JP2018206742A - Superconducting cyclotron and superconducting magnet - Google Patents

Abstract

To provide a superconducting cyclotron and a superconducting magnet, capable of widening a position adjustment range of a superconducting coil.SOLUTION: Up-and-down load support members 21, 22 include an attitude change part 102 in which their attitudes are changed following movement in the up-and-down direction of a coil support frame 9 by the up-and-down direction position adjustment part 78. Thus, when position adjustment of the coil support frame 9 is performed together with superconducting coils 7, 8 in the up-and-down direction, the attitudes of the up-and-down load support members 21, 22 are changed so as to follow the movement in the up-and-down direction of the coil support frame 9 in the attitude change part 102. Accordingly, position adjustment of the coil support frame 9 and the superconducting coils 7, 8 can be tolerated by the up-and-down load support members 21, 22 in a wide range.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a superconducting cyclotron and a superconducting electromagnet.

  Conventionally, for example, Patent Document 1 is known as a technique in such a field. The cyclotron described in Patent Document 1 includes a vacuum vessel, a superconducting coil disposed inside the vacuum vessel, and a coil support that supports the superconducting coil. The cyclotron includes a support that can adjust the position of the superconducting coil in the vertical and horizontal directions.

JP 2006-207454 A

  Here, in the above-described superconducting cyclotron, when the position of the superconducting coil is adjusted, the support is elastically deformed to allow the superconducting coil to move. However, in such a case, the position of the superconducting coil can be adjusted only within the range in which the support is elastically deformed. Therefore, there is a problem that the position adjustment range of the superconducting coil is narrow.

  An object of the present invention is to provide a superconducting cyclotron and a superconducting electromagnet capable of widening the position adjustment range of the superconducting coil.

  A superconducting cyclotron according to the present invention includes a superconducting coil wound around a winding center axis, a coil support that supports the superconducting coil, a vacuum container that houses the superconducting coil and the coil support, and a winding. A plurality of first direction support portions provided along the circumferential direction of the coil support for supporting the coil support relative to the vacuum vessel in a first direction in which the central axis extends, and a first direction in the first direction, respectively. A plurality of first direction position adjustment units that adjust the position of the coil support relative to the vacuum vessel via the direction support unit, wherein the first direction support unit is a first coil support body formed by the first direction position adjustment unit. It has a posture changing unit that changes its posture following the movement in the direction.

  The superconducting cyclotron according to the present invention includes a first direction support portion provided in a plurality along the circumferential direction of the coil support, which supports the coil support with respect to the vacuum vessel in the first direction, and a first direction. And a plurality of first direction position adjustment units that adjust the position of the coil support relative to the vacuum vessel via the respective first direction support units. Accordingly, the position of the coil support relative to the vacuum vessel can be adjusted by the first direction position adjustment unit. Here, the first direction support unit includes a posture change unit that changes the posture following the movement of the coil support in the first direction by the first direction position adjustment unit. As described above, when the position of the coil support body is adjusted in the first direction together with the superconducting coil, the first direction support section is configured to follow the movement of the coil support body in the first direction at the position change section. Change. Therefore, the 1st direction support part can accept | permit the position adjustment of a coil support body and a superconducting coil in a wide range. As described above, the position adjustment range of the superconducting coil can be widened.

  In the superconducting cyclotron, the coil support body has a first direction surface facing the superconducting coil in the first direction, and the first direction support portion includes a rod-shaped member connected to the vacuum vessel, and the posture change The portion is provided between the facing portion and the rod-shaped member, facing the first direction surface of the coil support and having a facing surface that is convex or curved or inclined toward the first direction surface. And a spherical bearing that rotatably supports the facing portion. When the first direction position adjustment unit is adjusted with respect to any one of the first direction support units, the coil support body is inclined with respect to the first direction together with the superconducting coil. Move to. With respect to the movement of the coil support portion, the posture changing portion has a facing surface that faces the first direction surface of the coil support body and is curved or inclined in a convex shape toward the first direction surface. It has a counter part. Thereby, it becomes the structure which the said opposing surface and 1st direction surface slide easily. In addition, the posture changing portion includes a spherical bearing that is provided between the facing portion and the rod-like member and supports the facing portion so as to be rotatable. Thereby, a counter part can be rotated with a spherical bearing according to the inclination of a coil support part. Therefore, the posture changing unit can appropriately change the posture following the movement of the coil support unit in the first direction.

  The superconducting cyclotron further includes a second direction position adjusting unit that adjusts the position of the coil support relative to the vacuum vessel in a second direction orthogonal to the first direction, and the coil support is spaced from the opposing portion in the second direction. When the coil support body moves in the second direction by adjusting the position of the second direction position adjustment portion, the first direction surface of the coil support body is the opposite surface of the facing portion. It may be configured to be slidable along. Thereby, when the position adjustment of the coil support body in the second direction is performed by the second direction position adjustment section, the coil support body is within the range of the size of the gap between the facing section and the second direction surface, It can move smoothly in the second direction.

  In the superconducting cyclotron, the first direction support portion includes a rod-like member that enters the vacuum vessel and is connected to the coil support portion, and the superconducting coil is arranged in the first direction at a midway position in the first direction of the rod-like member. And a posture changing portion that faces the first direction surface of the rod-like member and is curved or inclined in a convex shape toward the first direction surface. You may provide the opposing part which has a surface, and the spherical bearing which is provided between an opposing part and a rod-shaped member and supports an opposing part so that rotation is possible. When the first direction position adjustment unit is adjusted with respect to any one of the first direction support units, the coil support body is inclined with respect to the first direction together with the superconducting coil. Move to. With respect to the movement of the coil support portion, the posture changing portion faces the first direction surface of the rod-shaped member and has a facing surface that is curved or inclined in a convex shape toward the first direction surface. Department. Thereby, it becomes the structure which the said opposing surface and 1st direction surface slide easily. In addition, the posture changing portion includes a spherical bearing that is provided between the facing portion and the rod-like member and supports the facing portion so as to be rotatable. Thereby, a counter part can be rotated with a spherical bearing according to the inclination of the coil support part via a rod-shaped member. Therefore, the posture changing unit can appropriately change the posture following the movement of the coil support unit in the first direction.

  A superconducting electromagnet according to the present invention is a superconducting electromagnet that generates a magnetic field, a superconducting coil wound around a winding center axis, a coil support that supports the superconducting coil, a superconducting coil, and a coil support A plurality of first-direction support portions provided along the circumferential direction of the coil support that supports the coil support relative to the vacuum container in the first direction in which the winding central axis extends, and the vacuum container that houses the body therein And a plurality of first direction position adjusting parts for adjusting the position of the coil support relative to the vacuum vessel via the respective first direction support parts in the first direction. A posture change unit that changes the posture following the movement of the coil support in the first direction by the direction position adjustment unit is provided.

  According to the superconducting electromagnet according to the present invention, the same operation and effect as the above-described superconducting cyclotron can be obtained.

  According to the present invention, it is possible to provide a superconducting cyclotron and a superconducting electromagnet capable of widening the position adjustment range of the superconducting coil.

It is sectional drawing which shows the cross section which cut the superconducting cyclotron of one Embodiment of this invention in the direction in alignment with the central axis of a superconducting coil. It is sectional drawing which shows the cross section which cut the cyclotron in the direction orthogonal to the central axis of a superconducting coil. It is a perspective view which shows a horizontal direction load support body. It is sectional drawing which shows a horizontal direction load support body. It is a side view which shows a horizontal direction load support body. It is an expanded sectional view which shows a connection structure. It is an expanded sectional view which shows operation | movement of a connection structure. It is an expanded sectional view which shows operation | movement of a connection structure. It is an expanded sectional view showing the connection structure concerning a modification.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the superconducting cyclotron 1 according to the present embodiment supplies charged particles from an ion source (not shown) into the acceleration space G and accelerates the charged particles in the acceleration space G to charge particles. It is a horizontal circular accelerator that outputs a beam. Examples of the charged particles include protons and heavy particles (heavy ions). The superconducting cyclotron 1 is used as an accelerator for charged particle beam therapy, for example.

  In this superconducting cyclotron 1, the charged particle beam that draws a circular orbit in the acceleration space G is continuously accelerated, so isochronism (the time required for one round is equal regardless of the size of the radius of the circular orbit). It is necessary to control the magnetic flux density to ensure it.

  The superconducting cyclotron 1 includes a superconducting electromagnet 5 in addition to the ion source. The superconducting electromagnet 5 includes poles 3 and 4, a yoke 6, superconducting coils 7 and 8, a coil support frame (coil support) 9, and a vacuum vessel 10.

The poles 3 and 4 are spaced apart from each other in the direction of the central axis of the superconducting coils 7 and 8 (the central axis of winding of the superconducting coils 7 and 8) C. In the superconducting cyclotron 1, the central axis C direction is arranged along the vertical direction. Therefore, in the present embodiment, the “first direction” in the claims may be referred to as the “center axis C direction” or the “vertical direction”. The “second direction orthogonal to the first direction” may be referred to as the “horizontal direction”. The pole 3 is an upper pole disposed above the acceleration space G, and the pole 4 is a lower pole disposed below the acceleration space G. In addition, an electrode (a de-electrode, not shown) is provided between the poles 3 and 4. By applying a high frequency to this electrode, an electric field is formed.

  The yoke 6 is a hollow disk-shaped block, and the poles 3 and 4 and the vacuum vessel 10 are disposed therein. The yoke 6 includes a cylindrical portion 6a, a top portion 6b formed so as to close one opening of the cylindrical portion 6a, and a bottom portion 6c formed so as to close the other opening of the cylindrical portion 6a. The yoke 6 is for preventing the magnetic field lines generated by the superconducting coils 7 and 8 and the poles 3 and 4 from leaking to the outside.

  As shown in FIG. 2, the poles 3 and 4 have four hills 11 provided in a spiral shape so as to draw a spiral from the vicinity of the central axis C toward the radially outer side. The hills 11 face up and down across the acceleration space G, and converge the charged particle beam in the acceleration space G in the vertical direction.

  The hills 11 are arranged at equal intervals in the circumferential direction of the central axis C, and valleys 12 that are gaps are formed between the hills 11 adjacent in the circumferential direction. That is, the hills 11 and the valleys 12 are alternately formed on the poles 3 and 4 in the circumferential direction. In the superconducting cyclotron 1, the magnetic flux density is increased in the hill 11 and the magnetic flux density is decreased in the valley 12, whereby the charged particle beam is converged in the vertical direction and the horizontal direction. Thus, a superconducting cyclotron that forms a magnetic flux density that is strong and weak in the circumferential direction is called an AVF [Azimuthally Varying Field] cyclotron.

  In the AVF cyclotron, the four hills 11 are formed such that the magnetic flux density increases toward the outer side in the radial direction. The hill 11 is formed in a spiral shape in order to increase the vertical focusing force of the charged particle beam. If the magnetic flux density becomes weaker toward the outer side in the radial direction, a diverging force in the vertical direction acts on the charged particle beam. The valley 12 is not limited to the air gap, and may be a metal having a thickness smaller than that of the hill 11.

  As shown in FIG. 1, the superconducting coils 7 and 8 are wound so as to cover the outer peripheries of the poles 3 and 4. Superconducting coil 7 and superconducting coil 8 are arranged side by side in the central axis C direction. The upper superconducting coil 7 is wound so as to cover the outer periphery of the pole 3, and the lower superconducting coil 8 is wound so as to cover the outer periphery of the pole 4. For example, the superconducting coils 7 and 8 are not provided with an inner frame (or inner winding frame) on the inner peripheral side, and the inner peripheral surface of the coil (wire and adhesive for fixing the wire) is bonded by another member.・ Air core coil is not fixed.

  The coil support frame 9 includes a side plate portion 9 a that covers the outer peripheral surface of the superconducting coil 7, an upper ring member 9 b that covers the upper surface of the superconducting coil 7, a side plate portion 9 c that covers the outer peripheral surface of the superconducting coil 8, and superconductivity. A lower ring member 9d that covers the lower surface of the coil 8 and an intermediate portion 9e that connects the upper and lower side plate portions 9a and 9c are provided. The coil support frame 9 is formed over the entire circumference in the circumferential direction of the superconducting coils 7 and 8.

  The upper ring member 9b is formed so as to protrude radially inward from the upper end portion of the side plate portion 9a. The upper ring member 9b has an annular plate shape, and the plate thickness direction of the upper ring member 9b is arranged along the direction of the central axis C.

  The lower ring member 9d is formed so as to protrude radially inward from the lower end portion of the side plate portion 9c. The lower ring member 9d has an annular plate shape, and the thickness direction of the lower ring member 9d is arranged along the central axis C direction.

  The intermediate portion 9e includes an intermediate ring portion 9f, an upper overhang portion 9g, and a lower overhang portion 9h. The radial width of the intermediate ring portion 9 f corresponds to the radial width of the superconducting coils 7 and 8. The cross section of the intermediate ring portion 9f has a rectangular shape, for example. The upper surface of the intermediate ring portion 9 f is in contact with the lower surface of the superconducting coil 7, and the lower surface of the intermediate ring portion 9 f is in contact with the upper surface of the superconducting coil 8. The upper projecting portion 9g and the lower projecting portion 9h project outward in the radial direction from the outer peripheral surface of the intermediate ring portion 9f. The upper projecting portion 9g and the lower projecting portion 9h are disposed apart from each other in the central axis C direction. The upper projecting portion 9g is joined to the side plate portion 9a, and the lower projecting portion 9h is joined to the side plate portion 9a. Specifically, the upper surface of the upper protruding portion 9g is in contact with the lower surface of the side plate portion 9a, and the lower surface of the lower protruding portion 9h is in contact with the upper surface of the side plate portion 9c. The upper projecting portion 9g and the side plate portion 9a may be joined by bolt joining or other joining methods such as welding. Similarly, the joining of the lower projecting portion 9h and the side plate portion 9c may be bolt joining or other joining methods such as welding.

  The vacuum vessel 10 accommodates the superconducting coils 7 and 8 and the coil support frame 9. The vacuum container includes a coil housing portion 10a that houses the superconducting coil and the coil support frame 9, a communication portion 10b that communicates with the coil housing portion 10a, extends in the vertical direction, and a communication portion 10c that extends in the horizontal direction. The coil housing portion 10 a includes an inner wall 10 d disposed on the radially inner side of the superconducting coils 7 and 8 and an outer wall 10 e disposed on the radially outer side of the superconducting coils 7 and 8. 10 d of inner walls are arrange | positioned so that the inner peripheral side of the superconducting coils 7 and 8 and the coil support frame 9 may be covered, and 10 e of outer walls are arrange | positioned so that the outer peripheral side of the superconducting coils 7 and 8 and the coil support frame 9 may be covered. ing. That is, the superconducting coils 7 and 8 and the coil support frame 9 are arranged in the accommodation space sandwiched between the inner wall 10d and the outer wall 10e.

  Moreover, the vacuum vessel 10 has an upper surface wall that closes the upper side of the accommodation space, and a lower surface wall that closes the lower side of the accommodation space. The upper surface wall is disposed to face the upper ring member 9b in the central axis C direction, and the lower surface wall is disposed to face the lower ring member 9d in the central axis C direction. An opening is provided in the upper surface wall, and a communication portion 10b is disposed corresponding to the opening. Similarly, an opening is provided in the lower wall, and a communication portion 10b is disposed corresponding to the opening.

  The communication part 10b has, for example, a cylindrical shape and extends in the direction of the central axis C. The communicating part 10b accommodates vertical load supports 21 and 22 described later. The communication part 10c has, for example, a cylindrical shape and extends in an orthogonal direction orthogonal to the central axis C. The communication part 10c accommodates horizontal load supports 31 and 32 described later. The vacuum vessel 10 is connected to a refrigerator (cooling unit) 13 for cooling the superconducting coils 7 and 8. The refrigerator 13 is a GM refrigerator, for example, and can cool the superconducting coils 7 and 8 to 4K, for example. The refrigerator is not limited to a GM refrigerator (Gifford-McMahon cooler), and may be, for example, a Stirling refrigerator or other refrigerators.

  Here, the superconducting cyclotron 1 and the superconducting electromagnet 5 support the coil support frame 9 and adjust the position of the coil support frame 9 in the direction of the central axis C, a vertical load support (first direction support) 21, 22 and horizontal load supports (second direction support portions) 31 and 32 that support the coil support frame 9 and adjust the radial position of the coil support frame 9. The radial direction is an orthogonal direction orthogonal to the central axis C.

  The vertical load supports 21 and 22 are connected to the yoke 6 and the vacuum vessel 10 and support the coil support frame 9 with respect to the yoke 6 and the vacuum vessel 10 in the vertical direction. The vertical load supports 21 and 22 are arranged so as to sandwich the coil support frame 9 as a pair of upper and lower sides, and support the coil support frame 9 by pulling the coil support frame 9 in opposite directions. A plurality of the vertical load supports 21 and 22 are arranged in the circumferential direction of the coil support frame 9. The plurality of vertical load supports 21 and 22 are arranged at equal intervals in the circumferential direction of the coil support frame 9.

  The lower end portion of the vertical load support 21 is connected to the upper ring member 9b. The lower end portion of the vertical load support 21 is connected to the coil support frame 9 via the connection structure 100 in the vertical direction. A detailed description of the connection structure 100 will be described later. The vertical load support 21 extends upward from the upper ring member 9 b, penetrates the wall of the vacuum vessel 10, and projects to the outside of the yoke 6. A vertical position adjustment unit (first direction position adjustment unit) 78 that positions the vertical load support 21 with respect to the yoke 6 and the vacuum vessel 10 is provided at the upper end of the vertical load support 21. The vertical position adjustment unit 78 is a part that adjusts the position of the coil support frame 9 with respect to the yoke 6 and the vacuum vessel 10 via the vertical load support 21. The vertical load support 21 can be displaced in the direction of the central axis C by the vertical position adjustment unit 78. Examples of the vertical position adjustment unit 78 include position adjustment using screws. By rotating the nut attached to the screw, the screw is moved in the direction of the central axis C, and the vertical load support 21 is displaced. The attachment portion of the vertical load support 21 to the yoke 6 and the vertical position adjustment portion 78 can have the same configuration as the horizontal load support 31 described later.

  The upper end portion of the vertical load support 22 is connected to the lower ring member 9d. The upper end portion of the vertical load support 22 is connected to the coil support frame 9 via the connection structure 100 in the vertical direction. A detailed description of the connection structure 100 will be described later. The vertical load support 22 extends downward from the lower ring member 9 d, penetrates the wall of the vacuum vessel 10, and extends to the outside of the yoke 6. A vertical position adjusting unit 78 that positions the vertical load support 22 with respect to the yoke 6 and the vacuum vessel 10 is provided at the lower end of the vertical load support 22. The vertical position adjustment unit 78 is a part that adjusts the position of the coil support frame 9 with respect to the yoke 6 and the vacuum vessel 10 via the vertical load support 22. The vertical load support 22 can be displaced in the direction of the central axis C by the vertical position adjuster 78. Examples of the vertical position adjustment unit 78 include position adjustment using screws. By rotating the nut attached to the screw, the screw is moved in the direction of the central axis C, and the vertical load support 22 is displaced. The attachment portion of the vertical load support 22 to the yoke 6 and the vertical position adjustment portion 78 can have the same configuration as the horizontal load support 31 described later.

  The position of the superconducting coils 7 and 8 relative to the poles 3 and 4 can be changed by appropriately adjusting the position using the plurality of vertical load supports 21 and 22. Specifically, the superconducting coils 7 and 8 are displaced upward, the superconducting coils 7 and 8 are displaced downward, or the central axis C of the superconducting coils 7 and 8 is inclined with respect to the vertical direction. As described above, the superconducting coils 7 and 8 can be displaced.

The horizontal load supports 31 and 32 are connected to the yoke 6 and the vacuum vessel 10 and support the coil support frame 9 with respect to the yoke 6 and the vacuum vessel 10 in the horizontal direction from the outside in the radial direction. The horizontal load supports 31 and 32 partially enter the vacuum vessel 10 and are connected to the coil support frame 9. Further, the horizontal load supports 31 and 32 can adjust the position of the coil support frame 9. A plurality of (for example, four) horizontal load supports 31 and 32 are provided. Here, the vertical direction is the Z axis, and the axes that are orthogonal to the Z axis and orthogonal to each other are the X axis (first direction) and the Y axis (second direction) (see FIGS. 3 to 5). When the central axis C of the superconducting coils 7 and 8 is arranged along the Z axis, the X axis and the Y axis are orthogonal to the central axis C. As shown in FIG. 1, the pair of horizontal load supports 31 are disposed opposite to each other with the coil support frame 9 interposed therebetween, and the pair of horizontal load supports 32 are opposed to each other with the coil support frame 9 interposed therebetween. Are arranged. The direction X ₁ in which a pair of horizontal load bearing body 31 extends with _(X axis direction), the direction X ₂ in which a pair of horizontal load bearing body 32 extends _(X axis direction), are perpendicular Or may intersect at a predetermined angle.

  The pair of horizontal load supports 31 support the coil support frame 9 by pulling the coil support frame 9 in opposite directions. Similarly, the pair of horizontal load supports 32 support the coil support frame 9 by pulling the coil support frame 9 in opposite directions.

  FIG. 3 is a perspective view showing the horizontal load supports 31 and 32. FIG. 4 is a cross-sectional view showing the horizontal load supports 31 and 32. FIG. 5 is a side view showing the horizontal load supports 31 and 32. As shown in FIGS. 3 to 5, the horizontal load supports 31 and 32 include a coil support frame attachment portion 33, an inner link portion 34, an intermediate connection portion 35, an outer link portion 36, and a yoke attachment portion. 37. Hereinafter, the horizontal load support 31 will be described. The horizontal load support 32 is different only in the direction in which the horizontal load support 32 is arranged, and has the same configuration as the horizontal load support 31. Therefore, the description of the horizontal load support 32 is omitted.

  The coil support frame attaching part 33 is a part attached to the coil support frame 9. The coil support frame attachment portion 33 includes a flange portion 41 fixed to the coil support frame 9 and an extending portion 42 extending from the flange portion 41. The flange portion 41 has a disk shape, and one surface is connected to the coil support frame 9. The flange portion 41 is connected to the intermediate portion 9e of the coil support frame 9 by bolt joining. The flange portion 41 may be connected to other portions other than the intermediate portion 9e of the coil support frame 9. The coil support frame attaching portion 33 and the inner link portion 34 are made of, for example, titanium. The coil support frame attaching portion 33 and the inner link portion 34 may be formed of a material other than titanium, such as stainless steel.

  The extending portion 42 extends from the other surface of the flange portion 41 to the outside in the X-axis direction (the radially outer side of the superconducting coils 7 and 8). A connecting block portion 43 is provided at the outer end portion of the extending portion 42 in the X-axis direction. A through hole 43 a that penetrates in the Y-axis direction is formed in the connection block portion 43. Moreover, the side surface which opposes the Y-axis direction of the connection block part 43 is a flat surface.

  The inner link portion 34 includes a pair of connecting plates (first direction members) 44 and 45 that are disposed apart from each other in the Y-axis direction, and a pin member 46 that connects one ends of the pair of connecting plates 44 and 45. And a spherical axis 47 that connects the other ends of the pair of connecting plates 44 and 45.

  The connecting plates 44 and 45 have a predetermined length in the X-axis direction. The plate thickness direction of the connecting plates 44 and 45 is arranged along the Y-axis direction. Through holes 44a, 44b, 45a, 45b penetrating in the plate thickness direction are provided at both ends in the X-axis direction of the connecting plates 44, 45, respectively. Further, the pair of connecting plates 44 and 45 are disposed so as to sandwich the connecting block portion 43 in the Y-axis direction. The inner surfaces of the connecting plates 44 and 45 (surfaces facing the side surfaces of the connecting block portion 43) are formed as flat surfaces. The inner surfaces of the connection plates 44 and 45 are in contact with the side surfaces of the connection block portion 43.

  The pin member 46 has a cylindrical shape and is inserted through the through hole 41 a of the connection block portion 43. The outer peripheral surface of the pin member 46 is in contact with the inner peripheral surface of the through hole 41a. The pin member 46 is supported with respect to the connecting block portion 43 so as to be rotatable around the axis of the pin member 46. Further, both end portions of the pin member 46 project outward from the side surface of the connecting block portion 43 in the Y-axis direction.

  Both end portions of the pin member 46 in the X-axis direction are inserted into through holes 44a and 45a on one end side of the pair of connecting plates 44 and 45, respectively. At both ends of the pin member 46, the outer peripheral surface of the pin member 46 is in contact with the inner peripheral surface of the through hole 45 a on one end side of the pair of connecting plates 44 and 45. The pin member 46 is supported so as to be rotatable about the axis of the pin member 46 with respect to the pair of connecting plates 44 and 45. Thus, the pair of connecting plates 44 and 45 are supported so as to be rotatable about the Y axis with respect to the coil support frame mounting portion 33.

  The spherical shaft 47 has a cylindrical portion 47a provided at both ends in the Y-axis direction, and a spherical portion 47b disposed between the cylindrical portions 47a. The cylindrical portion 47a is inserted through the through holes 44b and 45b on the other end side of the pair of connecting plates 44 and 45, respectively. The outer peripheral surface of the columnar portion 47 a is in contact with the inner peripheral surfaces of the through holes 44 b and 45 b on the other end side of the pair of connecting plates 44 and 45.

  The spherical portion 47b has an outer diameter larger than the outer diameter of the cylindrical portion 47a. In addition, the width of the spherical portion 47b in the Y-axis direction is smaller than the outer diameter of the spherical portion 47b, for example, smaller than the width (thickness) of the connecting block portion 43 in the Y-axis direction. Further, the center of the spherical portion 47 b is disposed at the center between the pair of connecting plates 44 and 45.

  The intermediate connecting portion 35 is a portion that connects the inner link portion 34 and the outer link portion 36. The intermediate connecting portion 35 is provided on one end side and is provided with a bearing portion (spherical bearing portion) 48 that holds the spherical shaft 47 of the inner link portion 34 and the other end side and holds the spherical shaft 47 of the outer link portion 36. A bearing portion (spherical bearing portion) 49 and a strap portion 50 that couples both the bearing portions 48 and 49.

  The bearing portion 48 has a block body, and a spherical body receiving portion that receives the spherical portion 47b of the spherical shaft 47 is formed in the block body. The sphere receiving portion is an opening that holds the sphere portion 47b. The inner surface shape of the sphere receiving portion corresponds to the outer surface shape of the sphere portion 47b, and the inner surface 48a of the sphere receiving portion is a contact surface that contacts the outer surface of the sphere portion 47b. Further, the side surface of the bearing portion 48 facing the Y-axis direction is disposed to face the inner surfaces of the pair of connecting plates 44 and 45 in the Y-axis direction. A predetermined gap is formed between the side surface of the bearing portion 48 and the inner surfaces of the pair of connecting plates 44 and 45. The bearing portion 48 is slidable along the outer surface (spherical surface) of the spherical portion 47 b of the spherical shaft 47.

  Instead of the spherical shaft 47 and the bearing portion 48, a configuration including a pin member and a spherical sliding bearing may be used. In the case of this configuration, the pin member held by the spherical sliding bearing is inserted and held in the through holes 44b and 45b on the other end side of the pair of connecting plates 44 and 45.

  The bearing portion 49 has a block body, and a spherical body receiving portion for receiving a spherical portion 53b of a spherical shaft 53 (described later) of the outer link portion 36 is formed on the block body. The sphere receiving portion is an opening that holds the sphere portion 53b. The inner surface shape of the sphere receiving portion corresponds to the outer surface shape of the sphere portion 53b, and the inner surface 49a of the sphere receiving portion is a contact surface that contacts the outer surface of the sphere portion 53b. Further, the side surface of the bearing portion 49 facing the Y-axis direction is disposed to face the inner surfaces of the pair of connecting plates 51 and 52 in the Y-axis direction. A predetermined gap is formed between the side surface of the bearing portion 49 and the inner surfaces of the pair of connecting plates 51 and 52. The bearing portion 49 is slidable along the outer surface (spherical surface) of the spherical portion 53 b of the spherical shaft 53.

  Instead of the spherical shaft 53 and the bearing portion 49, a configuration including a pin member and a spherical sliding bearing may be used. In the case of this configuration, the pin member held by the spherical sliding bearing is inserted and held in through holes 51a and 52a on the other end side of a pair of connecting plates 51 and 52 described later of the outer link portion 36.

  As shown in FIG. 5, the strap portion 50 has a pair of belt-like portions 50 a and 50 b that are separated in the vertical direction and extend in the X-axis direction. The thickness direction of the strip-like portions 50a and 50b is arranged along the Z-axis direction. Moreover, the width direction of the strip | belt-shaped parts 50a and 50b respond | corresponds to the width | variety of the Y-axis direction of the bearing parts 48 and 49, for example. The strap portion 50 is formed of, for example, CFRP (carbon-fiber-reinforced plastic).

  One end sides of the strip portions 50 a and 50 b are connected to the bearing portion 48, and the other end portions of the strip portions 50 a and 50 b are connected to the bearing portion 49. The belt-like portions 50a and 50b may be fixed to the block bodies of the bearing portions 48 and 49 by fasteners for fixing the belt-like portions. For example, the belt-like portions 50a and 50b may be joined by bonding. It may be integrally formed with the above. Moreover, the strap part 50 may be formed in an endless shape by connecting ends of the pair of belt-like parts 50a and 50b.

  The strap portion 50 is supported to be swingable (rotatable) about the Y axis with respect to the inner link portion 34. The strap portion 50 is supported so as to be tiltable (rotatable) around the X axis with respect to the inner link portion 34. The strap portion 50 is supported to be swingable (rotatable) about the Z axis with respect to the inner link portion 34.

  Similarly, the strap portion 50 is supported so as to be swingable (rotatable) about the Y axis with respect to the outer link portion 36. The strap portion 50 is supported so as to be tiltable (rotatable) around the X axis with respect to the outer link portion 36. The strap portion 50 is supported to be swingable (rotatable) about the Z axis with respect to the outer link portion 36.

  Further, the intermediate connecting portion 35 may be provided with a plate-like member having a predetermined length instead of the strap portion 50, or may be provided with a rod-like member having a predetermined length. Moreover, the structure provided with the some strap part connected via the link mechanism may be sufficient as the intermediate | middle connection part 35. FIG.

  The outer link portion 36 includes a pair of connecting plates (first direction members) 51 and 52 that are spaced apart from each other in the Y-axis direction, and a spherical shaft 53 that connects one end portions of the pair of connecting plates 51 and 52. And a pin member 54 that couples the other ends of the pair of coupling plates 51 and 52.

  The connecting plates 51 and 52 have a predetermined length in the X-axis direction. The plate thickness direction of the connecting plates 51 and 52 is arranged along the Y-axis direction. At both ends of the connecting plates 51 and 52 in the X-axis direction, through-holes 51a, 51b, 52a and 52b penetrating in the plate thickness direction are provided, respectively. Further, the pair of connecting plates 51 and 52 are arranged so as to sandwich a connecting block portion 55 described later of the yoke mounting portion 37 in the Y-axis direction. The inner surfaces of the connecting plates 51 and 52 (surfaces facing the side surfaces of the connecting block portion 55) are formed as flat surfaces. The inner surfaces of the connecting plates 51 and 52 are in contact with the side surfaces of the connecting block portion 55.

  The spherical shaft 53 includes a cylindrical portion 53a provided at both ends in the axial direction, and a spherical portion 53b disposed between the cylindrical portions 53a. The cylindrical portion 53a is inserted through the through holes 51a and 52a on one end side of the pair of connecting plates 51 and 52, respectively. The outer peripheral surface of the cylindrical portion 53 a is in contact with the inner peripheral surfaces of the through holes 51 a and 51 b on one end side of the pair of connecting plates 51 and 52.

  The spherical portion 53b has an outer diameter larger than the outer diameter of the cylindrical portion 53a. Moreover, the width | variety in the Y-axis direction of a spherical part is smaller than the outer diameter of the spherical part 53b, for example, is smaller than the width | variety (thickness) in the Y-axis direction of the connection block part 55. FIG. Further, the center of the spherical portion 53 b is disposed at the center between the pair of connecting plates 51 and 52.

  The pin member 54 has a cylindrical shape and is inserted into the through hole 55 a of the connecting block portion 55 of the yoke mounting portion 37. The outer peripheral surface of the pin member 54 is in contact with the inner peripheral surface of the through hole 55 a of the connection block portion 55. The pin member 54 is supported so as to be rotatable about the axis of the pin member 54 with respect to the connecting block portion 55. In addition, both end portions of the pin member 54 protrude outward from the side surface of the connecting block portion 55 in the Y-axis direction.

  Both end portions in the longitudinal direction of the pin member 54 are inserted into the through holes 51b and 52b on the other end side of the pair of connecting plates 51 and 52, respectively. At both ends of the pin member 54, the outer peripheral surface of the pin member 54 is in contact with the inner peripheral surfaces of the through holes 51 b and 52 b on the other end side of the pair of connecting plates 51 and 52. The pin member 54 is supported so as to be rotatable about the axis of the pin member 54 with respect to the pair of connecting plates 51 and 52. Thus, the pair of connecting plates 51 and 52 are supported so as to be rotatable about the Y axis with respect to the yoke mounting portion 37.

  The yoke attaching portion 37 is a portion attached to the yoke 6. The yoke mounting portion 37 includes a connecting block portion 55, a bellows 56, a rod portion 57, and a horizontal direction position adjusting portion (second direction position adjusting portion) 58.

  A through hole 55 a through which the pin member 54 is inserted is formed in the connection block portion 55. The through hole 55a penetrates in the Y-axis direction. Moreover, the side surface which opposes the Y-axis direction of the connection block part 55 is a flat surface. The connecting block portion 55 is disposed so as to be sandwiched between the pair of connecting plates 51 and 52, and the pin member 54 inserted into the through hole 55 a is inserted into the through holes 51 b and 52 b of the pair of connecting plates 51 and 52. Yes. Further, the side surface of the connecting block portion 55 is in contact with the inner surfaces of the pair of connecting plates 51 and 52.

  The connecting block portion 55 is provided with an overhang portion 55b that protrudes outward from the outer end face in the X-axis direction. A rod portion 57 extending outward from the protruding portion 55b is provided. The rod portion 57 penetrates the vacuum vessel 10 and the yoke 6 and protrudes outward from the side surface of the yoke 6. A threaded portion 59 is formed on the outer peripheral surface of the outer end portion of the rod portion 57. A bellows 56 is connected to the rod portion 57.

  The horizontal position adjustment unit 58 is a positioning unit that is fixed to the yoke 6 and that is positioned with respect to the yoke 6. The horizontal position adjustment unit 58 is a part that adjusts the position of the coil support frame 9 with respect to the yoke 6 and the vacuum vessel 10 in the horizontal direction. The horizontal position adjusting portion 58 includes a load support fixing portion 60 projecting outward from the outer peripheral surface of the yoke 6, a screw portion 59 formed on the outer peripheral surface of the outer end portion of the rod portion 57, and the screw portion. And nuts 61 and 62 attached to 59.

  The load support body fixing portion 60 is a block body fixed to the yoke 6. The load support fixing part 0 is joined to the yoke 6 by welding or the like, for example. A through hole 60 a through which the rod portion 57 is inserted is formed in the load support body fixing portion 60. The rod portion 57 is inserted through the through hole 60 a and extends to the outside of the yoke 6. Moreover, the seat surface 60b which is a surface orthogonal to the X-axis of the load support body fixing | fixed part 60 is a flat surface. Further, a keyway is formed on the inner peripheral surface of the through hole 60a, and the rotation of the rod portion 57 around the axis is prevented.

  The screw portion 59 is formed on the outer peripheral surface of the outer end portion of the rod portion 57. The screw portion 59 is disposed outside the vacuum vessel 10 and the yoke 6. The screw portion 59 is formed from a portion disposed in the through hole 60a of the rod portion 57 to a portion disposed outside the through hole 60a. A washer 63 and nuts 61 and 62 are attached to the threaded portion 59 of the rod portion 57. The washer 63 is disposed between the seat surface 60 b of the load support fixing part 60 and the nut 61. By tightening the nut 61, the washer 63 is pressed against the seat surface 60 b of the load support fixing part 60. That is, the nut 61 is a member that is fitted into the threaded portion 59 of the rod portion 57 and moves the rod portion 57 forward and backward with respect to the vacuum vessel 10 by changing the amount of fitting. The nut 62 functions as a lock nut that restrains the movement of the nut 61 after the position adjustment.

  Then, by tightening the nut 61, the rod portion 57 moves to the outside in the X-axis direction (the right side in the figure), and a tensile force can be applied to the horizontal load support 31. When the tensile force is generated in the horizontal load support 31, the nut 61 and the washer 63 are pressed against the seat surface 60 b of the load support fixing part 60. Thereby, the rod part 57 is fixed to the load support body fixing part 60 via the nut 61 and the washer 63. That is, the yoke mounting portion 37 of the horizontal load support 31 is fixed to the yoke 6 and relatively fixed to the poles 3 and 4.

  As shown in FIG. 1, the vertical position adjustment portion 78 is formed on the outer peripheral surface of the load support fixing portion 60 having the same configuration as the horizontal position adjustment portion 58 and the outer end portion of the rod portion 57. And the nuts 61 and 62 attached to the threaded portion 59. The vertical position adjustment unit 78 has the same concept as the horizontal position adjustment unit 58 except that the coil support frame 9 is moved in the vertical direction via the vertical load supports 21 and 22.

  Next, a detailed structure of the connection structure 100 will be described with reference to FIG. 6 shows the connection structure 100 for the vertical load support 22, the connection structure 100 for the vertical load support 21 is the same as that shown in FIG. 6 except that the structure shown in FIG. Since the configuration has the same meaning as in FIG.

  The connection structure 100 is a structure that connects the vertical load support 22 and the coil support frame 9. The connection structure 100 includes a vertical load support 22 and a holding portion 103 formed on the coil support frame 9. Further, FIG. 6 will be described with the central axis CL set for the vertical load support 22.

  The holding portion 103 is formed on the lower surface 108 side of the lower ring member 9 d of the coil support frame 9. The holding part 103 has an L-shaped cross section and is provided around the central axis CL over the entire circumference. The holding portion 103 includes an extending portion 104 that extends downward from the lower surface 108 of the lower ring member 9d, and a protruding portion 106 that protrudes from the lower end portion of the extending portion 104 toward the central axis CL side. An inner peripheral surface 109 of the extending portion 104 is a surface (second direction surface) that faces a later-described facing portion 110 via a gap GP in the horizontal direction. Since the distal end portion 106 a of the protruding portion 106 is separated from the central axis CL toward the outer peripheral side, an opening 107 surrounded by the distal end portion 106 a of the protruding portion 106 is formed at the lower end portion of the holding portion 103. A space is formed between the protruding portion 106, the lower surface 108 of the lower ring member 9d, and the inner peripheral surface 109 of the extending portion 104 to accommodate an outer peripheral edge portion of a facing portion 110 described later. Here, the lower surface 108 of the lower ring member 9d is a surface (first direction surface) facing the superconducting coil 8 in the vertical direction. This lower surface functions as a receiving surface for sliding a facing portion 110 described later. Therefore, a member having a low friction coefficient may be provided on the surface of the lower surface 108 so that the facing portion 110 can be easily slipped, and a surface treatment for reducing the friction coefficient may be performed.

  The vertical load support 22 includes a rod-like member 101 extending in the vertical direction and a posture changing unit 102. The rod-shaped member 101 is a member that enters the vacuum vessel 10 and extends toward the coil support frame 9. The rod-shaped member 101 extends linearly in the communication portion 10b of the vacuum vessel 10 in the vertical direction and penetrates the vacuum vessel 10 on the lower end side. The posture changing portion 102 is provided at the upper end portion of the rod-like member 101 and is held by the holding portion 103 of the coil support frame 9. That is, the rod-like member 101 is connected to the holding portion 103 of the coil support frame 9 via the posture changing portion 102.

  The posture changing unit 102 is a portion that changes its posture following the movement of the coil support frame 9 in the vertical direction by the vertical position adjusting unit 78 (see FIG. 1). The posture changing unit 102 can change the posture following the movement of the coil support frame 9 in the horizontal direction by the horizontal position adjusting unit 58 (see FIG. 1). The posture changing unit 102 includes a facing unit 110 and a spherical bearing 120.

  The facing portion 110 is a substantially disk-shaped member that is accommodated in a space formed between the lower surface 108 of the holding portion 103 and the protruding portion 106. The outer diameter of the facing portion 110 is larger than the inner diameter of the tip end portion 106 a of the protruding portion 106. Therefore, the outer peripheral edge portion of the facing portion 110 is supported by the protruding portion 106. The facing portion 110 has a facing surface 110 a that faces the lower surface 108 of the coil support frame 9. The facing surface 110a may be curved in a convex shape toward the lower surface 108 of the coil support frame 9. In the present embodiment, the facing surface 110a is configured by a spherical surface that protrudes upward. Thereby, the opposing surface 110a makes point contact with the lower surface 108 of the coil support frame 9. The facing surface 110a is a spherical surface with the central axis CL as the central axis. Accordingly, the facing surface 110a makes point contact with the lower surface 108 of the coil support frame 9 at the position of the central axis CL. Note that the curvature of the spherical surface of the facing surface 110a may be gentler than that shown in FIG. Further, the shape of the facing surface 110a is not particularly limited as long as the facing surface 110a has a shape that makes point contact or substantially point contact with the lower surface 108 of the coil support frame 9; It may be a tapered surface. A slight gap is provided between the lower surface 110 b of the facing portion 110 and the upper surface of the protruding portion 106.

  The spherical bearing 120 is a member that is provided between the facing portion 110 and the rod-like member 101 and supports the facing portion 110 so as to be rotatable. The spherical bearing 120 includes a movable portion 121 that moves following the movement of the coil support frame 9 together with the facing portion 110, and a fixed portion 122 that is fixed to the rod-shaped member 101 and supports the movable portion 121.

  The movable portion 121 includes a sphere portion 123 disposed below the facing portion 110 and a connecting portion 124 that connects the sphere portion 123 and the facing portion 110. The sphere part 123 is a member constituted by a sphere whose center is arranged on the central axis CL. The center of the sphere part 123 is disposed at least below the protruding part 106 of the holding part 103 of the coil support frame 9. A flat surface 123 a may be formed on the lower end side of the spherical body portion 123. The connecting portion 124 is a columnar member that extends upward from the upper end portion side of the spherical body portion 123. The outer diameter of the connecting part 124 is smaller than the inner diameter of the opening 107 of the holding part 103. The connecting portion 124 is fixed to the sphere portion 123 and the facing portion 110. That is, the facing part 110 is fixed to the sphere part 123 through the connecting part 124.

  The fixed part 122 is a cylindrical member that surrounds the spherical part 123 and supports the movable part 121 in a rotatable manner. The fixed part 122 is arranged so that its central axis coincides with the central axis CL. The inner peripheral surface of the fixing portion 122 is configured as a receiving surface 122a that receives the spherical portion 123 so as to be slidable. The receiving surface 122a has a shape that curves radially outward along the spherical surface of the sphere 123. The lower end portion 122 b of the fixed portion 122 is configured in a planar shape and is fixed to the upper end portion of the rod-shaped member 101. In addition, a space for preventing interference with the spherical body portion 123 (see FIG. 8) of the rotating movable portion 121 is formed inside the rod-shaped member 101. The upper end portion 122 c of the fixing portion 122 is disposed at a position spaced downward from the lower end portion 106 b of the protruding portion 106 of the holding portion 103. As a result, a gap is formed between the fixing portion 122 and the holding portion 103, and interference between the fixing portion 122 and the protruding portion 106 can be suppressed when the coil support frame 9 moves through the gap (FIG. 8). reference).

  Next, operations and effects of the superconducting cyclotron 1 and the superconducting electromagnet 5 according to the present embodiment will be described.

  In this superconducting cyclotron 1, the superconducting coils 7 and 8 of the superconducting electromagnet 5 are energized, and magnetic flux is generated around the superconducting coils 7 and 8. This magnetic flux passes through the yoke 6 and the poles 3 and 4 to form a magnetic circuit around the superconducting coils 7 and 8, and a magnetic field is formed in the acceleration space G between the pair of opposed poles 3 and 4. The charged particles supplied to the acceleration space G are accelerated by a magnetic field and an electric field and emitted as a charged particle beam.

  In the superconducting cyclotron 1, the vertical position of the coil support frame 9 can be adjusted using the vertical load supports 21 and 22. Further, the position adjustment can be performed so as to change the inclination of the coil support frame 9 by the position adjustment by the plurality of vertical load supports 21 and 22. Thereby, the position and inclination of the superconducting coils 7 and 8 can be adjusted, and the charged particle beam can be adjusted by adjusting the magnetic field in the acceleration space G.

  In the superconducting cyclotron 1, since the coil support frame 9 is supported by the horizontal load supports 31, 32, the coil support frame 9 is used in the direction orthogonal to the central axis C direction using the horizontal load supports 31, 32. 9 can be moved to adjust the position.

  In addition, since the horizontal load supports 31 and 32 include the horizontal position adjustment unit 58, the rod unit 57 is rotated with respect to the load support fixing unit 60 by rotating the nut 61 in the X-axis direction. Can be moved to. By appropriately moving the positions of the plurality of horizontal load supports 31 and 32, the coil support frame 9 can be moved and adjusted in a direction orthogonal to the central axis C. Thereby, the superconducting coils 7 and 8 are moved in the direction orthogonal to the central axis C, the magnetic field by the superconducting coils 7 and 8 is adjusted, and the charged particle beam can be adjusted.

  Further, since the horizontal position adjustment unit 58 can displace the rod portion 57 by rotating the nut 61, the displacement amount of the rod portion 57 with respect to one rotation of the nut 61 can be made constant. Therefore, management of position adjustment can be facilitated. Similar actions and effects can be obtained for the vertical position adjustment unit 78.

  The superconducting cyclotron 1 includes a plurality of vertical load supports 21 and 22 provided in the circumferential direction of the coil support frame 9 that support the coil support frame 9 with respect to the vacuum vessel 10 in the vertical direction. In the vertical direction, a plurality of vertical position adjustment units 78 that adjust the position of the coil support frame 9 with respect to the vacuum vessel 10 via the vertical load supports 21 and 22 are provided. Therefore, the position of the coil support frame 9 with respect to the vacuum vessel 10 can be adjusted by the vertical position adjustment unit 78. Here, the vertical load supports 21 and 22 include a posture change unit 102 that changes the posture following the movement of the coil support frame 9 in the vertical direction by the vertical position adjustment unit 78. Thus, when the position of the coil support frame 9 along with the superconducting coils 7 and 8 is adjusted in the vertical direction, the vertical load supports 21 and 22 are moved in the vertical direction of the coil support frame 9 by the posture changing unit 102. The posture changes to follow the movement. Therefore, the vertical load supports 21 and 22 can allow the position adjustment of the coil support frame 9 and the superconducting coils 7 and 8 in a wide range. As described above, the position adjustment range of the superconducting coils 7 and 8 can be widened.

  In the superconducting cyclotron 1, the coil support frame 9 has a lower surface 108 facing the superconducting coils 7 and 8 in the vertical direction, and the vertical load supports 21 and 22 are rod-shaped connected to the vacuum vessel 10. The posture change unit 102 includes a member 101 and is opposed to the lower surface 108 of the coil support frame 9 and has a facing portion 110a having a facing surface 110a that is convex toward the lower surface 108 and is curved. A spherical bearing 120 provided between the member 101 and rotatably supporting the facing portion 110 may be provided. When the vertical position adjustment unit 78 is adjusted with respect to any one of the vertical load supports 21, 22 among the plurality of vertical load supports 21, 22, the coil support frame 9 has the superconducting coils 7, 8. At the same time, it moves so as to tilt with respect to the vertical direction. With respect to the movement of the coil support frame 9, the posture changing unit 102 faces the lower surface 108 of the coil support frame 9 and has a facing surface 110 a that curves toward the lower surface 108 and is curved. 110 is provided. Accordingly, the facing surface 110a and the lower surface 108 are easily slidable. In addition, the posture changing unit 102 includes a spherical bearing 120 that is provided between the facing part 110 and the rod-like member 101 and supports the facing part 110 so as to be rotatable. Thereby, the opposing part 110 can be rotated by the spherical bearing 120 according to the inclination of the coil support frame 9. Therefore, the posture changing unit 102 can appropriately change the posture following the movement of the coil support frame 9 in the vertical direction.

  Here, the attitude | position change aspect of the attitude | position change part 102 accompanying the position adjustment of the superconducting coils 7 and 8 to an up-down direction is demonstrated. As described above, a plurality of the vertical load supports 21 and 22 are arranged in the circumferential direction of the coil support frame 9. A plurality of vertical position adjusting sections 78 are also arranged in the circumferential direction of the coil support frame 9 in correspondence with the vertical load supports 21 and 22. When the vertical position adjustment of the superconducting coils 7 and 8 is performed, the plurality of vertical position adjustment units 78 are adjusted one by one. That is, when one vertical adjustment member 78 is adjusted to change the vertical position of one corresponding vertical load support 21, 22, another vertical load support 21 in the circumferential direction is changed. , 22 in the vertical direction does not change. Accordingly, the coil support frame 9 is applied with a force that moves in the vertical direction only on the portions corresponding to the vertical load supports 21 and 22 related to the position adjustment. Therefore, when the vertical position adjustment unit 78 performs vertical position adjustment, the coil support frame 9 does not move in the vertical direction while the angle with respect to the horizontal direction is kept constant, but the angle with respect to the horizontal direction changes. To move.

  For example, as shown in FIG. 6, the vertical load support 22 is slightly moved upward by adjustment of the vertical position adjustment unit 78 from a state where the lower surface 108 of the coil support frame 9 is horizontal. In this case, as shown in FIG. 8, the coil support frame 9 moves upward in such a manner that the lower surface 108 is slightly inclined with respect to the horizontal direction. At this time, the angle of the coil support frame 9 with respect to the vertical load support 22 changes slightly. The spherical bearing 120 of the posture changing unit 102 rotates the facing unit 110 that moves as the coil support frame 9 moves. The movable portion 121 connected to the facing portion 110 rotates in the rotation direction D1 with respect to the fixed portion 122 (see FIG. 8). As a result, the spherical bearing 120 of the posture changing unit 102 can allow the coil support frame 9 to move while maintaining the connected state between the vertical load support 22 and the coil support frame 9. Further, the facing surface 110 a of the facing portion 110 is a spherical surface that curves in a convex shape toward the lower surface 108 of the coil support frame 9. Therefore, the lower surface 108 of the coil support frame 9 can slide smoothly with respect to the opposing surface 110a. The lower surface 108 of the coil support frame 9 can be slightly rotated with respect to the facing portion 110 along the curved shape of the facing surface 110a. In FIG. 8, the gap between the lower surface 110b and the upper surface of the protrusion 106 is maintained on both the positive and negative sides in the X-axis direction on the paper surface. The coil support frame 9 may slide with respect to the facing surface 110a so that the gap on the side or the gap on the negative side is narrowed. Further, the lower surface 108 of the coil support frame 9 can be slid in the lateral direction with respect to the facing portion 110 while being guided by the facing surface 110a. Accordingly, the posture changing unit 102 can allow the coil support frame 9 to move while maintaining the connection state between the vertical load support 22 and the coil support frame 9.

  The superconducting cyclotron 1 further includes a horizontal position adjusting unit 58 that adjusts the position of the coil support frame 9 with respect to the vacuum vessel 10 in the horizontal direction. When the coil support frame 9 moves in the horizontal direction by adjusting the position of the horizontal position adjustment unit 58, the lower surface 108 of the coil support frame 9 is opposed to each other. The part 110 may be configured to be slidable along the facing surface 110a. Accordingly, when the position of the coil support frame 9 is adjusted in the horizontal direction by the horizontal position adjustment unit 58, the coil support frame 9 has a dimension range of the gap GP between the facing part 110 and the inner peripheral surface 109. It can move smoothly in the horizontal direction. For example, as shown in FIG. 7, when the coil support frame 9 moves in the horizontal direction (indicated by D2 in the figure) toward the outer peripheral side, the lower surface 108 is guided by the facing surface 11a as shown by the phantom line. Thus, the coil support frame 9 slides in the horizontal direction.

  The superconducting electromagnet 5 according to the present embodiment is a superconducting electromagnet 5 that generates a magnetic field, and the superconducting coils 7 and 8 wound around the central axis C and the coil support that supports the superconducting coils 7 and 8. A plurality of frames 9 are provided along the circumferential direction of the coil support frame 9 that supports the coil support frame 9 in the vertical direction, and a vacuum vessel 10 that accommodates the superconducting coils 7 and 8 and the coil support frame 9 therein. Vertical load supports 21 and 22 and a plurality of vertical position adjusters 78 for adjusting the position of the coil support frame 9 via the vertical load supports 21 and 22, respectively. The bodies 21 and 22 have a posture changing unit 102 that changes its posture following the movement of the coil support frame 9 in the vertical direction by the vertical position adjusting unit 78.

  According to the superconducting electromagnet 5, the same actions and effects as those of the superconducting cyclotron 1 described above can be obtained.

  The present invention is not limited to the above-described embodiments, and various modifications as described below are possible without departing from the gist of the present invention.

  The superconducting coils 7 and 8 of the superconducting electromagnet 5 are not limited to having the two superconducting coils 7 and 8 and may include one or three or more superconducting coils.

  Further, the superconducting electromagnet according to the present invention is not limited to the cyclotron, but can be applied to a silicon single crystal pulling apparatus by the MCZ method. The superconducting electromagnet can be applied to any device as long as the device requires a high magnetic field.

  Moreover, in the said embodiment, although it is set as the structure provided with the four horizontal direction load support bodies 31 and 32, the structure provided with one horizontal direction load support body may be sufficient, and it is provided with two or more horizontal direction load support bodies. It may be configured.

  Moreover, in the said embodiment, although the central axis C of the superconducting coils 7 and 8 is arrange | positioned along an up-down direction, the superconducting coils 7 and 8 arrange | positioned so that the central axis C may follow a horizontal direction. Alternatively, the superconducting coils 7 and 8 may be arranged such that the central axis C is inclined with respect to the vertical direction.

  In the above-described embodiment, the connection structure 100 is provided between the coil support frame 9 and the vertical load supports 21 and 22. It replaces with this and the connection structure 100 may be provided in the vacuum vessel 10 side. For example, as shown in FIG. 9, the connection structure 200 may be provided at a midway position in the vertical load support 222. The vertical load support 222 includes a bar-like member 201 that enters the vacuum vessel 10 and is connected to the coil support frame 9. In addition, a holding portion 203 and a posture changing portion 102 are provided at a midway position in the vertical direction of the rod-shaped member 201. The upper part of the bar-shaped member 201 is referred to as an upper bar-shaped member 201A, and the lower part is referred to as a lower bar-shaped member 201B. The lower surface 208 is formed as a first direction surface that faces the superconducting coils 7 and 8 in the vertical direction, while the lower surface 208 of the holding portion 203 provided at the lower end of the upper bar-shaped member 201A. The upper end of the upper bar-shaped member 201A is fixed to the coil support frame 9. The posture changing unit 102 is provided between the holding unit 203 and the upper end of the lower bar-shaped member 201B. The posture changing unit 102 itself has the same configuration as the connection structure 100 described above.

  According to such a configuration, when the vertical position adjustment unit 78 is adjusted with respect to the plurality of vertical load supports 222, the coil support frame 9 is inclined with respect to the vertical direction together with the superconducting coils 7 and 8. To move. With respect to the movement of the coil support frame 9, the posture changing unit 102 is opposed to the lower surface 208 of the upper bar-shaped member 201 </ b> A and has an opposed surface 110 a that is curved toward the lower surface 108. 110 is provided. Accordingly, the facing surface 110a and the lower surface 208 are configured to easily slide. The posture changing unit 102 includes a spherical bearing 120 that is provided between the facing portion 110A and the lower bar-shaped member 201B and supports the facing portion 110 so as to be rotatable. Thereby, the opposing part 110 can be rotated by the spherical bearing 120 according to the inclination of the coil support frame 9. Accordingly, the posture changing unit 102 can appropriately change the posture following the movement of the coil support frame 9 and the upper bar-shaped member 201A in the vertical direction. The holding part 203 may be provided at the upper end of the lower bar-shaped member 201B, and the posture changing part 102 may be provided upside down at the lower end of the upper bar-shaped member 201A.

  Note that the support structure of the superconducting cyclotron is not limited to the above-described embodiment. For example, in the above-described embodiment, the up-down direction load support is provided on both the upper side and the lower side. Alternatively, the upper four vertical load supports 21 may be omitted, and only the lower four vertical load supports 22 may be supported. Alternatively, the upper four vertical load supports 21 may be supported so as to be suspended, and the lower four vertical load supports 22 may be omitted. Further, although the vertical position adjustment unit 78 is attached to the yoke 6, it may be arranged inside the yoke 6 and attached to the vacuum vessel 10.

  DESCRIPTION OF SYMBOLS 1 ... Superconducting cyclotron, 5 ... Superconducting electromagnet, 7, 8 ... Superconducting coil, 9 ... Coil support frame (coil support), 21, 22 ... Vertical load support (1st direction support part), 31, 32 ... Horizontal load support (second direction support), 58 ... Horizontal position adjustment (second direction position adjustment), 78 ... Vertical position adjustment (first direction position adjustment), 101, 201 DESCRIPTION OF SYMBOLS ... Rod-shaped member, 102 ... Posture change part, 108, 208 ... Lower surface (1st direction surface), 109 ... Inner peripheral surface (2nd direction surface), 110 ... Opposing part, 110a ... Opposing surface, 120 ... Spherical bearing.

Claims (5)

A superconducting cyclotron that accelerates charged particles and emits charged particle beams,
A superconducting coil wound around the winding central axis;
A coil support for supporting the superconducting coil;
A vacuum vessel that houses the superconducting coil and the coil support inside,
A plurality of first direction support portions provided along the circumferential direction of the coil support body, which supports the coil support body with respect to the vacuum vessel in a first direction in which the winding central axis extends;
A plurality of first direction position adjustment units that adjust the position of the coil support relative to the vacuum vessel via the first direction support units in the first direction,
The first direction support part is a superconducting cyclotron having an attitude change part that changes its attitude following the movement of the coil support in the first direction by the first direction position adjustment part. The coil support has a first direction surface facing the superconducting coil in the first direction;
The first direction support portion includes a rod-shaped member that enters the vacuum vessel and extends to the coil support side,
The posture changing unit is
A facing portion having a facing surface that faces the first direction surface of the coil support and is curved or inclined in a convex shape toward the first direction surface;
The superconducting cyclotron according to claim 1, further comprising a spherical bearing provided between the facing portion and the rod-like member and rotatably supporting the facing portion. A second direction position adjustment unit for adjusting the position of the coil support relative to the vacuum vessel in a second direction orthogonal to the first direction;
The coil support has a second direction surface facing the facing portion via a gap in the second direction,
When the coil support moves in the second direction by adjusting the position of the second direction position adjustment unit, the first direction surface of the coil support is slidable along the facing surface of the facing portion. The superconducting cyclotron according to claim 2 configured. The first direction support portion includes a rod-shaped member that enters the vacuum vessel and is connected to the coil support,
In the midway position in the first direction of the rod-shaped member, the first direction surface facing the superconducting coil in the first direction, and the posture changing portion,
The posture changing unit is
An opposing portion having an opposing surface that faces the first direction surface of the rod-shaped member and is curved or inclined in a convex shape toward the first direction surface;
The superconducting cyclotron according to claim 1, further comprising a spherical bearing provided between the facing portion and the rod-like member and rotatably supporting the facing portion. A superconducting electromagnet that generates a magnetic field,
A superconducting coil wound around the winding central axis;
A coil support for supporting the superconducting coil;
A vacuum vessel that houses the superconducting coil and the coil support inside,
A plurality of first direction support portions provided along the circumferential direction of the coil support body, which supports the coil support body with respect to the vacuum vessel in a first direction in which the winding central axis extends;
A plurality of first direction position adjustment units that adjust the position of the coil support relative to the vacuum vessel via the first direction support units in the first direction,
The first direction support part is a superconducting electromagnet having an attitude change part that changes its attitude following the movement of the coil support in the first direction by the first direction position adjustment part.

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