JP6266437B2 - Superconducting coil device - Google Patents

Description

  The present invention relates to a superconducting coil device having a superconducting coil formed by winding a tape-shaped superconducting wire.

  As the superconducting coil device, one that is used as a deflecting electromagnet for an accelerator for an accelerator that accelerates charged particles is known. This deflecting electromagnet for an accelerator is one that bends and controls charged particles by a magnetic field, and generally comprises a coil, an iron core (yoke), and a magnetic pole (see, for example, Patent Document 1).

  In order to accurately guide charged particles, a high degree of magnetic field uniformity is required for the deflection electromagnet. This uniform magnetic field distribution is realized by the shape of the magnetic pole provided in the vicinity of the beam trajectory region where charged particles flow. However, if the magnetic pole is saturated, the magnetic field distribution changes depending on the excitation current, so the generated magnetic field is limited to about 1.7 T at the maximum, and a copper wire is used for the coil that generates this magnetic field. .

  On the other hand, when the deflection electromagnet is required to be small and light, superconductivity is applied to the coil (see, for example, Patent Documents 2, 3, and 4). By applying superconductivity, a high magnetic field can be generated, and the orbit radius of the charged particles can be reduced, so that the deflection electromagnet can be reduced in size and weight. However, if a high magnetic field is generated by applying superconductivity, the iron in the iron core and the magnetic pole is saturated, so that it is impossible to form a magnetic field with the magnetic pole.

  For this reason, when superconducting is used, as shown in FIG. 14, a superconducting coil device 100 that obtains a desired magnetic field distribution by combining a plurality of coils (superconducting coils 101 to 106) and devising their arrangement is provided. Used (see, for example, Patent Documents 5 and 6). In FIG. 14, reference numeral 107 denotes a winding axis, and reference numeral 108 denotes a magnetic field.

Japanese Patent Laid-Open No. 10-335100 JP 2011-91094 A JP 2010-118457 A JP-A-8-293410 Japanese Patent Laid-Open No. 4-97506 JP 2007-260222 A

  In the superconducting coil device 100, in order to effectively use the magnetic field, the superconducting coils 101 to 106 are generally bowl-shaped and have a long shape in the beam traveling direction, and are arranged around the beam duct through which charged particles flow. The At this time, since the beam trajectory draws a curve (circle) with a constant curvature, it is desirable that the superconducting coils 101 to 106 have a shape along the beam trajectory and are curved with respect to the longitudinal direction.

  However, when the superconducting wire forming the superconducting coils 101 to 106 is a tape-shaped superconducting wire such as an yttrium-based superconducting wire, it is difficult to bend the superconducting wire in the width direction. If the superconducting wire is forcibly bent in the width direction, a large strain in the width direction is generated in the superconducting wire and the superconducting characteristics of the superconducting coil device 100 are deteriorated.

  As described above, in the superconducting coil device 100 including the superconducting coils 101 to 106 that are curved with respect to the longitudinal direction among the saddle-shaped superconducting coils 101 to 106 formed from the tape-shaped superconducting wire, the superconducting characteristics are reduced. There is a risk that.

  The object of the present invention has been made in consideration of the above-mentioned circumstances, and suppresses the occurrence of distortion in the wire width direction in the superconducting wire that forms the superconducting coil by being wound, thereby providing suitable superconducting characteristics. The object is to provide a superconducting coil device that can be secured.

  A superconducting coil device according to the present invention is a superconducting coil device including a plurality of three-dimensional superconducting coils formed by winding a tape-shaped superconducting wire around the surface of a winding shaft, and the superconducting coils are opposed to each other. And the superconducting wire is positioned in a state where the superconducting wire is continuously opposed to both ends of the main body and the main body provided with the wire surface parallel to the axis of the superconducting coil, The superconducting wire is connected to a twisted portion in which the surface of the wire is twisted outward with respect to the axis of the superconducting coil, and the twisted portion facing on both sides of the main body portion, and extends in a curved shape. The superconducting wire has a connecting portion provided at the central portion in the extending direction with the wire surface inclined inward with respect to the axis of the superconducting coil. In the connecting portion, the twisting from the central portion in the extending direction is performed. To headed is characterized in that the inclination of the superconducting wire is configured continuously changed.

  According to the present invention, at the connecting portion of the superconducting coil, the superconducting wire inclines the wire surface inward with respect to the axis of the superconducting coil at the central portion in the extending direction extending in a curved shape, and from the central portion toward the twisted portion. Thus, the inclination of the superconducting wire is continuously changed. For this reason, in the superconducting coil, the tensile force and the compressive force in the longitudinal direction of the wire do not act on the edge portions on both sides in the width direction of the superconducting wire in the connecting portion and the twisted portion. As a result, the lengths of the edge portions on both sides in the width direction of the superconducting wire become substantially equal, and the occurrence of strain in the width direction of the superconducting wire can be suppressed at the connecting portion and the twisted portion of the superconducting coil. Can be suitably secured.

(A) is a top view which shows 1st Embodiment of the superconducting coil apparatus which concerns on this invention, (B) is a surface view which shows the tape-shaped superconducting wire which forms the superconducting coil of FIG. 1 (A). Sectional drawing which follows the II-II line | wire of FIG. Sectional drawing which expands and shows FIG. 2 roughly. Sectional drawing which follows the IV-IV line of FIG. Sectional drawing which expands and shows FIG. 4 roughly. Sectional drawing which follows the VI-VI line of FIG. (A) to (D) are explanatory views for explaining changes in the inclination of the superconducting wire in the deflection part, twisting part and connecting part of the superconducting coil of FIG. The top view which shows 2nd Embodiment of the superconducting coil apparatus which concerns on this invention. Sectional drawing which follows the IX-IX line | wire of FIG. Sectional drawing which follows the XX line of FIG. Sectional drawing which shows the deflection | deviation part of the superconducting coil in 3rd Embodiment of the superconducting coil apparatus which concerns on this invention. Sectional drawing which shows the boundary site | part of the twist part and connection part of a superconducting coil in 3rd Embodiment of the superconducting coil apparatus which concerns on this invention. Sectional drawing which shows the extension direction center site | part of the connection part of the superconducting coil in 3rd Embodiment of the superconducting coil apparatus which concerns on this invention. The conventional superconducting coil apparatus is shown, (A) is a top view, (B) is a side view, (C) is sectional drawing which follows the XIV-XIV line | wire of FIG. 14 (A).

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[A] First embodiment (FIGS. 1 to 7)
1A is a plan view showing a first embodiment of a superconducting coil device according to the present invention, and FIG. 1B is a surface view showing a tape-shaped superconducting wire forming the superconducting coil of FIG. 1A. It is. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG. The superconducting coil device 10 shown in FIGS. 1, 2 and 4 is used as a deflecting electromagnet, for example, in an accelerator for accelerating charged particles, and is arranged outside an annular beam duct through which charged particles pass. Then, a magnetic field 1 (FIGS. 2 and 4) for forming a circular orbit on the charged particle is formed.

  The superconducting coil device 10 according to the first embodiment includes a superconducting coil body 13 in which a plurality of superconducting coils 10 having a three-dimensional shape (a saddle shape in this embodiment) are coaxially provided on the outer surface of a pipe-shaped winding shaft 11. The superconducting coil body 13 is disposed so as to face the axis Q of the winding shaft 11. Each superconducting coil 12 of each superconducting coil body 13 has a tape-shaped superconducting wire 14 on a ring-shaped winding frame 15 installed on the outer surface of the winding shaft 11 as shown in FIG. 3, FIG. 5 and FIG. It is a saddle type superconducting coil formed by being wound a plurality of times.

  This saddle-shaped superconducting coil 12 is a superconducting coil having a shape in which a corner portion (a connecting portion 18 described later) of the racetrack-shaped superconducting coil is curved upward and rises. The superconducting coil 12 includes two deflecting portions 16 as main body portions provided in parallel to face each other, four twisted portions 17 provided continuously at both ends of each deflecting portion 16, and the deflecting portion 16. And two connecting portions 18 that connect the two twisted portions 17 facing each other.

  Here, the superconducting wire 14 is a multi-layer structure in which a substrate, an intermediate layer, an RE-based oxide superconducting layer, and a protective metal layer are laminated, and is a tape-shaped thin film superconducting wire. In addition, the winding shaft 11 has a cylindrical (pipe) shape, and is configured by bending an axis Q along an annular beam duct of the accelerator. However, the winding shaft 11 is not limited to a cylindrical shape, and may be, for example, an elliptical shape or a rectangular tube shape with curved corners.

  Each of the deflecting portions 16 of the superconducting coil 12 extends in a long shape facing each other in a state of being curved with a constant curvature R along the winding axis 11 because the axis Q of the winding axis 11 is curved. Be present. In the deflecting unit 16, as shown in FIGS. 1, 3, and 7 (A), the superconducting wire 14 is arranged with the wire surface 20 parallel to the axis O (y direction) of the superconducting coil 12. As a result, even when the deflecting portion 16 is curved with a constant curvature R, the superconducting wire 14 in the deflecting portion 16 only bends in the thickness direction. Therefore, in the superconducting wire 14 in the deflecting portion 16, the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 are substantially equal.

  As shown in FIG. 1, the two twisted portions 17 positioned facing each other in the superconducting coil 12 extend linearly from one end of the deflecting portion 16, and two other twisted portions 17 positioned facing each other in the superconducting coil 12. The two twisted portions 17 extend linearly from the other end opposite to one end of the deflecting portion 16. In each of the twisted portions 17 in the superconducting coil 12, the superconducting wire 14 is in a state where the wire surface 20 is parallel to the axis O of the superconducting coil 12 at the boundary portion 22 with the deflecting portion 16 (see FIG. 7A). The wire 20 is twisted to the outside of the superconducting coil 12 at a constant pace, and the wire surface 20 is inclined outward with respect to the axis O of the superconducting coil 12 and continues to the connecting portion 18. At the boundary portion 23 between the twisted portion 17 and the connecting portion 18, the superconducting wire 14 has a wire surface 20 in a straight line parallel to the axis O of the superconducting coil 12 as shown in FIGS. 4, 5, and 7 (B). In contrast, the superconducting coil 12 is inclined to the outside by an inclination angle α and faces the substantially radial direction of the winding shaft 11.

  As shown in FIG. 1, a connecting portion 18 that connects two twisted portions 17 facing each other on both sides of the deflecting portion 16 in the superconducting coil 12 exists in a curved shape between the two twisted portions 17. The superconducting wire 14 of the connecting portion 18 is a straight portion parallel to the axis O of the superconducting coil 12 at the central portion 24 in the extending direction of the connecting portion 18 as shown in FIGS. 6 and 7D. On the other hand, the superconducting coil 12 is disposed so as to be inclined at an inclination angle φ. Further, in this connecting portion 18, the superconducting wire 14 is arranged such that the inclination from the central portion 24 in the extending direction of the connecting portion 18 toward the twisted portion 17 continuously changes from the inside to the outside of the superconducting coil 12. Is done. For example, as shown in FIG. 7C, the superconducting wire 14 includes a superconducting coil at an intermediate portion 25 between the central portion 24 in the extending direction of the connecting portion 18 and the boundary portion 23 between the connecting portion 18 and the twisted portion 17. The inclination angle β of the wire surface 20 with respect to a straight line parallel to the 12 axis O is set to be smaller than the inclination angle α at the boundary portion 23 with the twisted portion 17.

  As described above, in the connecting portion 18 of the superconducting coil 12, the superconducting wire 14 has the wire surface 20 inclined at an inclination angle φ inside the superconducting coil 12 at the central portion 24 in the extending direction of the connecting portion 18, and this extension. The inclination angle continuously changes from the inner side to the outer side of the superconducting coil 12 from the direction central portion 24 toward the boundary portion 23 between the connecting portion 18 and the twisted portion 17, and at the boundary portion 23 between the connecting portion 18 and the twisted portion 17. Inclined to the outside of the superconducting coil 12 at an inclination angle α. Further, in the twisted portion 17 of the superconducting coil 12, the superconducting wire 14 is twisted to the outside of the superconducting coil 12, and the wire surface 20 is aligned with the axis O of the superconducting coil 12 at the boundary portion 22 between the twisted portion 17 and the deflecting portion 16. The inclination angle changes continuously from the parallel state to the inclination angle α at the boundary portion 23 between the twisted portion 17 and the connecting portion 18.

この長さＬ１、Ｌ２の差の比Ｌｃは、超電導線材１４に許容される歪をε％としたときにε以下（Ｌｃ＜ε）であることが望ましい。 In the twisted portion 17 and the connecting portion 18 of the superconducting coil 12, the inclination angle of the wire surface 20 of the superconducting wire 14 moves from the outer side to the inner side of the superconducting coil 12 from the twisted portion 17 toward the central portion 24 in the extending direction of the connecting portion 18. By continuously changing, in the superconducting wire 14 in the twisted portion 17 and the connecting portion 18, the tensile force and compressive force in the longitudinal direction of the superconducting wire 14 are applied to the edge portions 21 on both sides in the width direction W of the superconducting wire 14. For this reason, the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 are substantially equal. At this time, the ratio Lc of the difference between the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 is given by the following equation.

The ratio Lc of the difference between the lengths L1 and L2 is desirably ε or less (Lc <ε) when the strain allowed for the superconducting wire 14 is ε%.

  For example, the opening angle θ (FIGS. 3 and 5) of the superconducting coil 12 formed by winding the superconducting wire 14 around the winding frame 15 of the winding shaft 11 is set to 64 degrees, and the winding shaft at the connecting portion 18 of the superconducting coil 12 is used. 11 is a dimension P1 along the axis Q (FIG. 1 (A) is 100 mm, the diameter D (FIG. 3) of the winding shaft 11 is 140 mm, and superconductivity at the central portion 24 in the extending direction of the connecting portion 18 of the superconducting coil 12. When the inclination angle φ (FIGS. 6 and 7B) of the wire surface 20 of the wire 14 is 45 degrees and the dimension Wu (FIG. 1B) in the width direction W of the superconducting wire 14 is 2 mm, the superconducting coil The ratio Lc of the difference between the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 in the twelve connecting portions 18 is 0.09% at the maximum.

Here, the strain ε% allowed for the superconducting wire 10 varies depending on the shape and characteristics of the superconducting wire 14, but is generally 0.1% to 0.5%. Accordingly, at this time, the ratio Lc between the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 in the connecting portion 18 of the superconducting coil 12 is the strain ε (0. 1% to 0.5%) or less. The dimension P2 (FIG. 1A) along the axis Q of the winding shaft 11 in the twisted portion 17 of the superconducting coil 12 is given by the following equation with the unit of the opening angle θ being radians.

Two manufacturing procedures for manufacturing the superconducting coil 12 having the above-described configuration will be described below.
In the first manufacturing procedure, first, a superconducting wire 14 is wound around a racetrack-shaped or ring-shaped winding frame to produce a two-dimensional superconducting coil, and then an external force is applied to the two-dimensional superconducting coil. Thus, a three-dimensional saddle-shaped superconducting coil 12 is manufactured. In the second manufacturing procedure, a three-dimensional saddle-shaped winding frame 15 is used, and a superconducting wire 14 is wound around the winding frame 15 to directly manufacture a three-dimensional saddle-shaped superconducting wire coil 12. In both the first and second manufacturing procedures, the superconducting coil 12 has high winding accuracy by bonding the winding frame and the superconducting wire 14 and the superconducting wires 14 to be wound together with an adhesive. Retained.

With the configuration as described above, the following effects (1) to (3) are achieved according to the first embodiment.
(1) The connecting portion 18 of the superconducting coil 12 in the superconducting coil device 10 has a central portion 24 extending in a curvilinear direction and the superconducting coil 14 extends the wire surface 20 to a straight line parallel to the axis O of the superconducting coil 12. The superconducting wire 14 is inclined from the inner side of the superconducting coil 12 to the outer side continuously from the central portion 24 in the extending direction toward the twisted portion 17. Therefore, in the superconducting coil 12, the tensile force and the compressive force in the longitudinal direction of the superconducting wire 14 do not act on the edge portions 21 on both sides in the width direction W of the superconducting wire 14 in the connecting portion 18 and the twisted portion 17. As a result, the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 become substantially equal, and distortion in the width direction W of the superconducting wire 14 occurs in the connecting portion 18 and the twisted portion 17 of the superconducting coil 12. Therefore, the superconducting characteristics of the superconducting coil device 10 can be suitably secured.

  (2) In the deflection unit 16 of the superconducting coil 12 in the superconducting coil device 10, the superconducting wire 14 is provided with the wire surface 20 parallel to the axis O of the superconducting coil 12. Even when extending in a state of being curved to a constant curvature R along the axis Q, the bending is only in the thickness direction of the superconducting wire 14. As a result, in the deflection part 16 of the superconducting coil 12, the lengths L1 and L of the edge part 21 on both sides in the width direction W of the superconducting wire 14 are substantially equal, and the occurrence of distortion in the width direction W of the superconducting wire 14 can be suppressed. The superconducting characteristics of the superconducting coil device 10 can be suitably secured.

  (3) In particular, the ratio Lc between the lengths L1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 in the connecting portion 18 of the superconducting coil 12 of the superconducting coil device 10 is set to 0.1% or less. In this case, since the external force acting on the superconducting wire 14 can be reduced as much as possible in order to maintain the shape of the superconducting wire 14, high winding accuracy can be realized in the superconducting coil 12 of the superconducting coil device 10.

[B] Second Embodiment (FIGS. 8 to 10)
FIG. 8 is a plan view showing a second embodiment of the superconducting coil device according to the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is simplified or omitted.

  The superconducting coil device 30 of the second embodiment is different from that of the first embodiment in that the portion corresponding to the twisted portion 17 and the connecting portion 18 of the superconducting coil 12 in the winding shaft 31 has a pipe shape as in the first embodiment. 9 is that the portion corresponding to the deflecting portion 16 of the superconducting coil 12 in the winding shaft 31 is composed of a plurality of flat plates 33 as shown in FIG. .

  A portion of the winding shaft 31 corresponding to the deflecting portion 16 of the superconducting coil 12 is arranged between a plurality of flat plates 33 arranged at a predetermined interval in the diameter direction of the cylindrical body 32 and supports these flat plates 33. And a stay (not shown). On the surface of each flat plate 33, a winding frame 35 having a shape curved to a constant curvature R is installed. A winding frame 34 that is continuous with the winding frame 35 is installed on the surface of the cylindrical body 32. The superconducting wire 14 is wound around the winding frame 35 and the winding frame 34 to form the superconducting coil 12. The deflection portion 16 of the superconducting coil 12 is a portion formed by winding the superconducting wire 14 around a winding frame 35 installed on a flat plate 33. The twisting portion 17 and the connecting portion 18 are formed by the superconducting wire 14 being a cylindrical body. This is a portion formed by being wound around a winding frame 34 installed at 32.

  With the configuration as described above, according to the second embodiment, in addition to the same effects as the effects (1) to (3) of the first embodiment, the following effect (4) is obtained.

  (4) A portion of the winding shaft 31 corresponding to the deflection portion 16 of the superconducting coil 12 is constituted by a plurality of flat plates 33, and the superconducting wire 14 is wound around a winding frame 35 installed on the flat plate 33. Since the deflection portion 16 of the superconducting coil 12 is formed, the superconducting wire 14 can be easily wound around the winding frame 35. Therefore, the winding error of the superconducting wire 14 in the deflection unit 16 of the superconducting coil 12 can be suppressed, and the disturbance of the magnetic field 1 due to the winding error can be avoided. As a result, high magnetic field accuracy can be realized in the superconducting coil device 30.

[C] Third Embodiment (FIGS. 11 to 13)
FIG. 11 is a cross-sectional view showing a deflection portion of a superconducting coil in the third embodiment of the superconducting coil device according to the present invention. FIG. 12 is a cross-sectional view showing a boundary portion between the twisted portion and the connecting portion of the superconducting coil in the third embodiment, and FIG. 13 is an extending direction of the connecting portion of the superconducting coil in the third embodiment. It is sectional drawing which shows a center site | part. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is simplified or omitted.

  The superconducting coil device 40 of the third embodiment differs from the first embodiment in that the superconducting wire 14 is twisted between the turns of the superconducting wire 14 wound at the twisted portion 17 and the connecting portion 18 of the superconducting coil 41. Spaces 42 as adjustment members having different thicknesses are arranged along the width direction W, and spaces 43 as adjustment members are arranged between the turns of the superconducting wire 14 to be wound in the deflection unit 16 of the superconducting coil 41. This is the point.

  That is, as shown in FIGS. 12 and 13, in the twisted portion 17 and the connecting portion 18 of the superconducting coil 41, the superconducting wire 14 wound around the winding frame 15 to form the twisted portion 17 and the connecting portion 18. A long space 42 is interposed between the turns (between all turns or a part of turns). The spacer 42 has a wedge shape or a dog bone shape in which the thickness T of the vertical cross-sectional shape with respect to the longitudinal direction of the spacer 42 is thicker on the winding shaft 11 side and gradually becomes thinner from the winding shaft 11 in the radial direction. The spacer 42 may have a wedge shape or a dog bone shape in which the vertical cross-sectional shape with respect to the longitudinal direction of the spacer 42 is thin on the winding shaft 11 side and gradually increases as the distance from the winding shaft 11 increases in the radial direction.

  Further, as shown in FIG. 11, in the deflecting portion 16 of the superconducting coil 41, between each turn of the superconducting wire 14 wound around the winding frame 15 to form the deflecting portion 16 (between all turns or partly). A long spacer 43 is interposed between the two turns. The spacer 43 has a rectangular shape with a uniform thickness S and a wedge shape or a dog bone shape similar to the spacer 42. The spacer 43 may not be interposed between the superconducting wires 14, and only the spacer 42 may be interposed between the superconducting wires 14 in the twisted portion 17 and the connecting portion 18 of the superconducting coil 41.

  The superconducting coil 41 of the third embodiment is a superconducting coil having a larger number of turns (number of turns) of the superconducting wire 14 than the superconducting coil 12 of the first embodiment. Thus, when the number of turns of the superconducting wire 14 increases, the edges on both sides in the width direction W of the superconducting wire 14 in the deflecting portion 16, the twisting portion 17 and the connecting portion 18 (particularly the twisting portion 17 and the connecting portion 18) of the superconducting coil 41. The inclination angle of the wire surface 20 for making the lengths L1 and L2 of the portion 21 substantially equal to the inclination angle determined by the winding frame 15 changes. Therefore, a spacer 42 is interposed between the turns of the superconducting wire 14 in the twisted portion 17 and the connecting portion 18 of the superconducting coil 41, and a spacer 43 is appropriately interposed between the turns of the superconducting wire 14 in the deflecting portion 16 of the superconducting coil 41. By doing so, the lengths 1 and L2 of the edge portions 21 on both sides in the width direction W of the superconducting wire 14 forming the superconducting coil 41 can be made substantially equal.

  With the configuration as described above, according to the third embodiment, in addition to the same effects as the effects (1) to (3) of the first embodiment, the following effect (5) is obtained.

  (5) Since the twisted portion 17 and the connecting portion 18 of the superconducting coil 41 are provided with spacers 42 having different thicknesses T along the width direction W of the superconducting wire 14 between the turns of the superconducting wire 14. The lengths L1 and L2 of the edge portions 21 on both sides in the width direction W in the superconducting wire 14 forming the twisted portion 17 and the connecting portion 18 can be set substantially equal when the number of turns of the superconducting wire 14 is increased. As a result, since the occurrence of distortion in the width direction W of the superconducting wire 14 can be suppressed in the twisted portion 17 and the connecting portion 18 of the superconducting coil 41, the superconducting characteristics of the superconducting coil device 40 can be suitably secured.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. Is included in the scope and gist of the invention, and is included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 Superconducting coil apparatus 11 Winding shaft 12 Superconducting coil 14 Superconducting wire 16 Deflection part (main part)
17 twisted portion 18 connecting portion 20 wire surface 21 edge portion 24 extending direction central portion 30 superconducting coil device 31 winding shaft 33 flat plate 40 superconducting coil device 41 superconducting coil 42 spacer (adjusting member)
L1, L2 Length O Axis Q Axis center R Curvature S, T Thickness W Width direction α, β, φ Inclination angle

Claims (5)

A superconducting coil device comprising a plurality of three-dimensional superconducting coils formed by winding a tape-shaped superconducting wire around the surface of a winding shaft,
The superconducting coil extends in a long and opposite manner, and the superconducting wire is provided with a main body provided with a wire surface parallel to the axis of the superconducting coil,
The superconducting wire is positioned continuously opposite to both ends of the main body, and the twisted portion is twisted by inclining the wire surface outward with respect to the axis of the superconducting coil.
The superconducting wire is provided with the wire surface inclined inward with respect to the axis of the superconducting coil at a central portion in the extending direction that connects the twisted portions facing each other on both sides of the main body and extends in a curved shape. A connecting portion,
The superconducting coil device is characterized in that the connecting portion is configured such that the inclination of the superconducting wire continuously changes from the central portion in the extending direction toward the twisted portion.   2. The superconducting coil according to claim 1, wherein the main body of the superconducting coil is extended in a long shape so as to face each other in a state of being curved with a constant curvature by bending the axis of the winding shaft. apparatus.   3. The superconducting coil device according to claim 1, wherein a ratio of a difference in length of edge portions on both sides in the width direction of the superconducting wire is set to 0.5% or less at the connecting portion of the superconducting coil. .   The winding shaft is configured by including a plurality of flat plates in which a portion corresponding to the main body portion of the superconducting coil is arranged at a predetermined interval, and the main body portion is configured by winding a superconducting wire on the surface of the flat plate. The superconducting coil device according to any one of claims 1 to 3, wherein the superconducting coil device is provided.   5. The adjustment member having a different thickness along the width direction of the superconducting wire is disposed between the turns of the superconducting wire at the connecting portion and the twisted portion of the superconducting coil. The superconducting coil device according to claim 1.

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