KR102267142B1 - High power input coupler for accelerating tube - Google Patents

Abstract

The present invention is a high-output input coupler for an acceleration tube configured to include a first coupler module, a second coupler module, and a third coupler module, wherein the first coupler module has an acceleration tube connection part in which one end of the body is connected to the acceleration tube in a cylindrical shape. Wow; an antenna member positioned at the center of the accelerator tube connection portion to emit a high-energy RF signal to the accelerator tube; an antenna tip member formed in the center of the accelerator pipe connection part to couple the antenna member; an outer tube member formed in a cylindrical shape between the accelerator pipe connection part and the RF window member of the second coupler module to form a body of the first coupler module and having a hollow inside; Acceleration tube, characterized in that it comprises an inner tube member which is formed in the inner center of the outer tube member in the shape of a hollow rod and has a plurality of porous holes for discharging cooling gas therein along the circumference of the body. A high-power input coupler is provided.
The present invention as described above forms a plurality of perforated holes on the inner and outer sides of the antenna inner member of the input coupler for the acceleration tube to quickly discharge the high heat generated by the accelerated high-frequency beam to the outside, so that the antenna inner by the high-heat beam for a long time As it minimizes multi-factoring that is damaged by colliding with the inner wall of the member, it has the effect of maximizing the durability of the high-output input coupler.

Description

High-power input coupler for acceleration tube {HIGH POWER INPUT COUPLER FOR ACCELERATING TUBE}

The present invention relates to a high-power input coupler for an acceleration tube, and in particular, a high-output for an acceleration tube that rapidly discharges high heat generated by an accelerated high-frequency beam to the outside by forming a plurality of perforated holes on the inner and outer sides of the antenna inner member of the input coupler for the acceleration tube. It is about the input coupler.

In general, in a superconducting accelerator system, a charged particle beam is guided into an acceleration cavity, and a high-frequency electromagnetic wave is introduced through an input coupler. And the charged particles in the cavity are accelerated by the high-frequency electric field generated in the cavity. The input coupler also introduces into the cavity a high frequency generated by a high frequency generator (eg klystron) and propagated by the waveguide. In other words, the input coupler as described above, that is, the RF power coupler, is a type of transmitting high-frequency power of a very high output to some of the cavities arranged in a plurality of cavities in the beam propagation direction for charged particle acceleration. it is a waveguide Because RF power couplers transmit very high frequencies and powers, components in the RF signal path can rise to very high temperatures, require high insulation, and have excellent vacuum shielding performance due to the high degree of vacuum on the cavity side. Furthermore, there are two types of the input coupler, a coaxial coupler and a square waveguide coupler.

Then, when an example of the conventional input coupler as described above is described with reference to FIG. 1 , the input coupler usually includes a first coupler module 70 , a second coupler module 71 and a third coupler module 72 . do. At this time, the first coupler module 70 has a loop coupler 74 forming a loop connected to the cavity 73 and RF, and one end of the antenna member loop coupler 74 is connected to one side, and an antenna member ( It is formed so that the other end of the 74 is placed, and includes a first outer conductor 75 having an axially symmetrical shape with a hollow inside. And the second coupler module 71 includes a window 76 . In addition, the third coupler module 72 is connected to an RF power source.

On the other hand, schematically looking at the operation of the conventional input coupler as described above, the high-frequency charged particles are introduced through the third coupler module 72 and the first coupler module 70 via the second coupler module 71 . is entered into the cavity of Here, it is maintained in a vacuum state with the RF window 76 inside the cavity of the first coupler module 70 as a boundary. At this time, the charged particles introduced in the cavity are exposed to the alternating electric field at a very high speed in the high vacuum region, and then are emitted to the accelerator tube through the antenna member 74 .

However, the conventional input coupler as described above corresponds to a feedthrough in which an RF window, one of the main components of the input coupler, shields a vacuum region and an atmospheric region to transmit an RF signal, and a high frequency signal uses an insulator. Because it penetrates, the heat is severe. In particular, the conventional input coupler may be easily damaged by discharge breakdown due to repeated discharge and collision of charged particles from the exposed surface of the vacuum side of the first coupler module 70 of the input coupler. This is sometimes referred to as multipacing, and since the power of the RF signal is very high, when multi-factoring occurs, the inner surface is frequently damaged by high energy discharge due to an avalanche effect or the like. This causes a problem that the RF signal is not transmitted normally, or that it may be difficult to maintain a vacuum degree of a beam line, for example, a cavity interior space of 10 torr or less, due to damage to the inner surface.

Further, the input coupler is connected to the waveguide at one end and to the acceleration cavity at the other end. The acceleration cavity is maintained in a vacuum during operation, and is cooled to, for example, about 4K, and a part of the input coupler connected to the acceleration cavity is also cryogenically cooled.

Since the acceleration cavity needs to be kept at a cryogenic temperature during operation as described above, in order to block the heat transferred from the input coupler to the acceleration cavity side, it is necessary to take measures against a thermal load on the input coupler.

When the RF window 76 is installed, cooling water flows inside the inner conductor of the input coupler, and heat generated in the first inner conductor surrounded by the first outer conductor 75 of the first coupler module 70 is cooled by water cooling. can be cooled However, since the RF window 76 is kept at a cryogenic temperature of about 80K by the cooling water, when the cooling water flowing inside the first inner conductor is water, the inside of the first inner conductor on the side of the acceleration cavity rather than the RF window 76 There is a risk of water coagulation. As a result, the heat generated in the first inner conductor is not cooled, and is transferred to the first outer conductor 75 side through the RF window 76, resulting in heat loss.

For this reason, although a cooling gas or the like is usually used as a heating medium for cooling the inner conductor 55, the cooling gas has a small heat capacity and low cooling performance.

In consideration of this, various structures have been attempted for an efficient cooling method using a cooling gas.

Accordingly, the present invention was invented to solve the problems of the prior art as described above, and by forming a plurality of perforated holes on the inside and outside of the antenna inner member of the input coupler for the acceleration tube, the high heat generated by the accelerated high-frequency beam is released to the outside. An object of the present invention is to provide a high-output input coupler for an acceleration tube that minimizes multi-factoring damage caused by the inner wall of an antenna inner member collided by a beam of high heat for a long time by discharging it quickly.

Another object of the present invention as described above is by forming a plurality of spiral-shaped grooves in the inner position of the outer tube member of the input coupler for the acceleration tube corresponding to the position corresponding to the porous perforation hole of the inner member of the antenna, thereby providing high output input. An object of the present invention is to provide a high-output input coupler for an accelerator tube that significantly improves the cooling efficiency of the coupler.

According to an aspect of the present invention for achieving the above object, as a high-output input coupler for an acceleration tube configured to include a first coupler module, a second coupler module and a third coupler module, the first coupler module has one end of the body cylindrical an acceleration pipe connection part connected to the acceleration pipe upwards; an antenna member positioned at the center of the accelerator tube connection portion to emit a high-energy RF signal to the accelerator tube; an antenna tip member formed in the center of the accelerator pipe connection part to couple the antenna member; an outer tube member formed in a cylindrical shape between the accelerator pipe connection part and the RF window member of the second coupler module to form a body of the first coupler module and having a hollow inside; Acceleration tube, characterized in that it comprises an inner tube member which is formed in the inner center of the outer tube member in the shape of a hollow rod and has a plurality of porous holes for discharging cooling gas therein along the circumference of the body. A high-power input coupler is provided.

In another embodiment, the porous hole having a certain diameter in the inner tube member may be more concentrated per unit area as it approaches the antenna member side.

In another embodiment, as the porous hole of the inner tube member approaches the antenna member, the diameter of the porous hole may be larger.

In another embodiment, the outer tube member may have a plurality of guide grooves of a predetermined size formed on the inner surface of the body.

In this case, the guide groove of the outer tube member may be formed in a spiral shape so that the inner surface has a predetermined inclination.

In another embodiment, a guide groove of the outer tube member may be formed at a position corresponding to the porous hole of the inner tube member.

In another embodiment, the porous hole of the inner tube member may be selectively formed on only one of 1/3, 1/2, and 2/3 surfaces of the cylindrical body of the inner tube member.

According to the present invention as described above, by forming a plurality of perforated holes on the inside and outside of the antenna inner member of the input coupler for the acceleration tube, the high heat generated by the accelerated high-frequency beam is rapidly discharged to the outside, so that the Since multi-factoring that is damaged by collision with the inner wall of the antenna inner member is minimized, the durability of the high-output input coupler is maximized accordingly.

In addition, the present invention as described above is by forming a plurality of spiral-shaped grooves in the inner position of the outer tube member of the input coupler for the acceleration tube corresponding to the position corresponding to the porous perforation hole of the inner antenna member, the porosity of the inner member of the antenna Since the high heat discharged from the drilling hole is rapidly dissipated to the outside of the body along the spiral-shaped machining groove, there is also an effect of significantly improving the cooling efficiency of the high-output input coupler.

1 is an explanatory view for explaining an example of a conventional input coupler.
2 is a schematic perspective view of an example of a high-output input coupler for an acceleration tube according to the present invention.
3 is a schematic exploded perspective view in which a part of a high-output input coupler for an acceleration tube according to the present invention is disassembled.
4 is a schematic cross-sectional view of a high-output input coupler for an acceleration tube according to the present invention.
5 is an explanatory diagram schematically illustrating a high-output input coupler for an acceleration tube according to the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the related drawings.

2 is a schematic perspective view of an example of a high-output input coupler for an acceleration tube according to the present invention, FIG. 3 is a schematic exploded perspective view in which a part of the high-output input coupler for an acceleration tube according to the present invention is disassembled, and FIG. 4 is according to the present invention It is a schematic cross-sectional view of a high-output input coupler for an acceleration tube, and FIG. 5 is an explanatory view for schematically explaining the high-output input coupler for an acceleration tube according to the present invention.

As shown in FIG. 2 , the input coupler 1 according to the present invention is configured to include a first coupler module 2 , a second coupler module 3 and a third coupler module 4 . At this time, as shown in FIGS. 3 to 4, the first coupler module 2 has one end of the body in a cylindrical shape and is connected to an acceleration pipe (a cavity member that is an acceleration cavity; not shown). And, the antenna member 6 located in the center of the accelerator tube connecting portion 5 and emitting a high-energy RF signal to the accelerator tube, and the accelerator tube connecting portion 5 so as to couple the antenna member 6 An antenna tip member 7 formed in the center; It is formed in a cylindrical shape between the accelerator pipe connection part 5 and the RF window member 8 to form the body of the first coupler module 2, and a plurality of guide grooves 9A-N of a certain size are formed on the inner surface thereof. an outer tube member 10 formed and having a hollow inside; The inner tube member 12 is formed in the inner center of the outer tube member 10 in the shape of a hollow rod and has a plurality of porous holes 11A-N for discharging the cooling gas therein along the circumference of the body. is comprised of

The outer tube member 10 is made of, for example, stainless steel, and a surface thereof may be plated with copper. Moreover, copper plating is possible for stainless steel, and SUS316L and SUS304 are mentioned as an example. The inner tube member 12 may be formed of oxygen-free copper. The cooling gas may be nitrogen gas as an inert gas, and the cooling gas may be supplied from a refrigerant insertion port (not shown) connected to the inner conductor 25 of the third coupler module 4 , and the cooling gas may be supplied from the inside It may be supplied to the inside of the inner tube member 12 through the conductor 25 and the inner conductor of the second coupler module (3). In addition, the RF source may apply a high-frequency RF signal to the input coupler through a transmission line connection part (not shown) connected to the third coupler module 4 .

Here, in the inner tube member 12, porous holes 11A-N having a certain diameter are formed to be more concentrated per unit area as the closer to the antenna member 6 is, the higher the heat around the antenna member 6 is rapidly discharged to the outside, so that the high heat generated inside the inner tube member 12 prevents the RF frequency from affecting the function of being emitted to the accelerator tube through the antenna member 6 as much as possible. The reason for allowing more cooling gas to flow toward the antenna member 6 is that it is combined with an acceleration tube operated in 2-4K superconductivity, unlike a normal normal-conducting accelerator coupler, so it is necessary to reduce the thermal load due to room temperature and power. have. Specifically, the closer to the cavity member, which is an acceleration tube connected to the first coupler module 2, the higher the discharge and collision of the charged particles, the higher the temperature inside the first coupler module 2, so the porous hole 11A-N is used as an antenna member. By disposing more densely toward the (6) side, the entire interior of the first coupler module 2 can be cooled to a uniform temperature, and cooling efficiency can be maximized.

In addition, as the porous hole 11A-N of the inner tube member 12 approaches the antenna member 6, the diameter of the porous hole 11A-N per unit area becomes larger so that heat is discharged more quickly. have. Adopting a structure that further widens the diameter of the porous hole 11A-N can cool the entire interior of the first coupler module 2 to a uniform temperature, as well as the above-mentioned reason, to maximize cooling efficiency it is for

3 to 5 illustrates a structure in which the porous holes 11A-N are formed entirely along the circumference of the inner tube member 12, but cooling is concentrated in the first coupler module 2 Depending on the necessary parts and design matters, the porous holes 11A-N of the inner tube member 12 may be formed only on 1/3, 1/2, and 2/3 sides of the circumference of the cylindrical body of the inner tube member 12. may be Even in this way, since the cooling gas has excellent fluidity, it is possible to satisfy the processing convenience of the porous holes 11A-N and cool the inside of the first coupler module 2 to a uniform low temperature.

Furthermore, the guide grooves 9A-N of the outer tube member 10 may be formed in a spiral shape so that the inner surface thereof has a predetermined inclination. According to this, the cooling gas flowing out from the porous holes 11A-N can flow between the outer tube member 10 and the inner tube member 12 with a certain direction without forming turbulence, so that the first Not only contributes to uniformly cooling the entire inside of the coupler module 2, but also discharge to the second coupler module 3 side can be realized smoothly.

Furthermore, guide grooves 9A-N of the outer tube member 10 may be formed at positions corresponding to the porous holes 11A-N of the inner tube member 12 . Specifically, the outlet portion of the porous hole (11A-N) and the concave portion of the guide groove (9A-N) may be arranged to correspond. Accordingly, the cooling gas flowing out from the porous hole 11A-N may be injected into the concave portion of the guide groove 9A-N to have a smooth fluid flow direction, thereby achieving cooling efficiency and external discharge.

On the other hand, the front end of the outer tube member (10) is provided with a superconducting acceleration pipe connecting flange (13), while the other side is provided with an outer wall connecting flange (14).

In addition, the outer tube member 10 has an iris area of the loop through which magnetic flux linking the loop passes, so that the degree of matching between the RF signal transmitted to the cavity and the RF electromagnetic field within the cavity can be adjusted. A connecting mechanism may be provided.

And the second coupler module (3) is provided with an RF window member (8) is formed to cool the central axis and the outer peripheral surface of the RF window member (8). In addition, the second coupler module 3 is made of an electrical insulator, and the RF window member 8 coaxial with the outer circumferential surface of the second coupler module 3 is formed in an annular shape. In addition, the third coupler module 4 is formed by assembling two semicircular electrical insulators and is provided with an annular support disk 15 and an RF power source including a second through hole 16 coaxial with the outer circumferential surface. . Here, the third coupler module 4 includes a transmission line connection flange 17 formed to fix the support disk 15 and includes an RF input flange 18 to which an RF power source is connected. In addition, the RF window member 8 is made of a ceramic material.

On the other hand, the inner conductor and the outer conductor of the second coupler module 20 correspond to a feed-through through which a high-frequency (eg 352 MHz), high-voltage (eg, 250 kW) RF signal is transmitted. supported in a true state. The inner conductor may be coupled to the inner tube member 12 , and the outer conductor may be connected to the outer tube member 10 through a fastening method such as screw coupling with the outer wall connection flange 14 . In particular, since the RF window member 8 is in a high vacuum state with one side of 10 torr or less, and is exposed to an alternating electric field at a very high speed in a high vacuum region, discharge destruction may occur. This phenomenon is sometimes explained as multi-factoring, and the RF signal becomes unstable or the localized heat rise in the generated area is caused. At this time, as a representative solution to prevent multi-factoring as described above, thinly coating titanium nitride (TiN) to a thickness of several nanometers or less, or securing the purity of alumina powder to 99% or more, and reducing the reaction by high frequency There are a sintering method that maximally excludes harmful magnesium (Mg) component and a method of maximally removing internal voids in the ceramic by additionally performing an isotropic hot pressing (HIP) treatment after sintering.

And the titanium nitride coating significantly lowers the secondary electron emission characteristic (SEY) of the surface to lower the probability of multi-factoring, but to minimize the reflection of the RF signal transmitted through the RF window member 8 It is so preferable that the thickness is thin. In addition, the first coupler module 2 , the second coupler module 3 , and the third coupler module 4 may be connected by welding or screw coupling. At this time, in order to secure the transmission efficiency of the RF signal transmitted through the RF window member 8 of the second coupler module 3 and the RF signal quality, it is preferable to actively suppress the heat generation of the RF window member 8 .

At this time, when the temperature of the RF window member 8 is excessively increased by the isotropic heating and compression process, the internal pores are substantially exposed by thermal expansion and exposed to the RF signal. In particular, when a high-power RF signal is transmitted so as to have high beam energy through acceleration of charged particles, it is impossible to transmit sufficiently large RF energy to the cavity member, which is the acceleration cavity, unless such heat generation is suppressed.

Therefore, by metalizing the area of both sides adjacent to the outer circumferential surface of the RF window member 8, the bondability with the metal is improved, and the ring-shaped and KOVAR material is formed so that it can be assembled in the corresponding area, The outer ring 19 is coupled to both sides by brazing.

Here, one side of the RF window member 8 disposed toward the vacuum side is coated with titanium nitride (TiN). At least one side surface coded with titanium nitride is electrically connected to the second outer conductor 20 by an outer ring 19 made of cobar material.

The KOBA material is a representative material for absorbing thermal expansion between a ceramic material and a metal material having a large thermal expansion coefficient, and is used for bonding between these dissimilar materials due to the nonlinearity of the thermal expansion coefficient to secure sealing properties.

On the other hand, between the RF window member 8 and the outer wall connection flange 14, a vacuum measuring device connection port 24 for measuring the degree of vacuum between the first coupler module 2 and the RF window member 8, the first coupler An electronic measuring device connection port and an arc discharge measuring device connection port for measuring electronic-related characteristics excited by an RF signal in the module 2 may be additionally installed.

Next, the operation and effect of the device of the present invention having the above structure will be described in detail.

In order to couple the input coupler 1 of the present invention, first, after coupling the second front end connecting flange 21 of the second coupler module 3 to the outer wall connecting flange 14 of the first coupler module 2, screw They are connected by means of fastening or welding. And after coupling the third front end connecting flange 23 of the third coupler module 4 to the second rear end connecting flange 22 of the second coupler module 3 coupled as described above, screw fastening or welding, etc. combine with And a vacuum measuring device (not shown) is coupled to the vacuum measuring device connection port 24 provided at one end of the second coupler module 3 . In addition, a transmission line is connected to the transmission line connection flange 17 of the third coupler module 4 .

On the other hand, the high-power input coupler (1) for the accelerator tube of the present invention is a device coupled to the particle accelerator. Here, the particle accelerator, especially the linear accelerator, is briefly described. The linear accelerator is a device that generates electrons by an electron gun at the starting point and accelerates the electrons to the speed of light by using a high-power high-frequency generator through an acceleration tube. Electrons reaching the speed of light at the tip of the linear accelerator are incident on a storage ring (not shown) through a transmission tube (BTL: beam transfer line: not shown) and an injection system (not shown). At this time, the electrons incident on the storage ring are continuously rotated in the vacuum pipe of the storage ring (corresponding to the input coupler of the present invention) to generate radiation by the mechanism described above. Here, the storage ring makes the orbit of electrons circular (responsible for lateral acceleration) and controls the orbit, a vacuum device that provides an ultra-high vacuum environment, and a high-frequency resonance that supplements the energy lost by the radiation of radiation. It consists of an RF cavity and various control devices. For example, a high-frequency acceleration joint device such as the input coupler 1 of the present invention is installed in a straight section in the storage ring to compensate for the energy lost due to radiation and various losses when the electron beam passes, so that the electron beam is maintained for a long time. While rotating the storage ring, it generates radiation. And the high-frequency power transmitted through the coaxial line 25 of the input coupler 1 as described above is the first coupler module 2 with an empty inside through the RF window member 8 made of ceramic for maintaining a vacuum state. is entered into At this time, the incident high frequency excites a voltage of several hundred kilovolts between the electrodes at both ends of the acceleration cavity, and electrons passing between the electrodes with the correct phase are accelerated. For example, the energy received from the electric field that has a frequency of 500 MHz and changes to a sinusoidal waveform in the acceleration process varies depending on the phase of the electron beam passing between the electrodes. If it is contained in the energy range of electrons that can rotate while forming a closed orbit by the optical system of the storage ring, it can reach the acceleration cavity again without losing it during rotational motion. If this energy range is expressed as the relationship between the energy of the electron beam when it enters the accelerating cavity and the high-frequency phase applied to the cavity at that time, a closed curve is formed, which is called “RF bucket”. And the electrons having the energy and phase defined in the bucket are stored and continue to rotate, but if for some reason (collision or instability, etc.) is out of this range, the energy is lost and the storage current is gradually reduced. Therefore, even when the electron beam is incident from the input coupler 1 as described above, when the desired bucket passes to the incident point, the firing time of the electron gun or the operation time of the injection device is adjusted so that the electron beam can reach the bucket with energy defined by the bucket. Adjust.

That is, if the operation of the input coupler 1 of the present invention as described above is schematically more specifically described, first, when the high-frequency charged particles are supplied to the rear end of the third coupler module 4, the high-frequency charged particles are Like the particle accelerator, it is accelerated while moving by an electric field and a magnetic field, and the accelerated charged particles pass through the RF window member 8 of the second coupler module 3 and are in an ultra-vacuum state of the first coupler module (2). It is applied to the inside of the inner tube member (12). And as described above, the inner tube member 12 of the first coupler module 2 further accelerates the charged particles to the antenna member 6 via the antenna tip member 7 formed in the center of the acceleration pipe connection part 5. forward to Then, the antenna member 6 located at the center of the accelerator pipe connection part 5 emits a high-energy RF signal input via the antenna tip member 7 to the acceleration pipe.

At this time, as described above, an ultra-high vacuum state is maintained inside the first coupler module 2 to accelerate the electron beam, and the low temperature required to stabilize the internal vacuum state of the first coupler module 2 is always constant. It is filled with cooling gas to maintain it.

In this process, high heat is generated because charged particles charged with high heat are repeatedly collided and released on the internal vacuum exposed surface of the first coupler module 2 by multipacting, and the internal surface is caused by such high heat discharge. There is a risk of this being damaged. Therefore, in the input coupler 1 according to the present invention, in order to cool the high heat as described above, first, the inner tube member 12 located at the inner center of the outer tube member 10 of the first coupler module 2 is 1 The high-temperature cooling gas generated inside the vehicle is discharged to the outside. That is, since the inner tube member 12 has a plurality of porous holes 11A-N formed along the inner and outer circumferences of the body, the inner tube member 12 is heated through the porous holes 11A-N. The cooling gas is quickly discharged to the outside.

At this time, the porous hole 11A-N of the inner tube member 12 is another embodiment, and the closer to the antenna member 6 side, the larger the diameter of the porous hole 11A-N per unit area is formed. This may be expelled more quickly. In addition, since the porous holes 11A-N of the inner tube member 12 are formed only on 1/3, 1/2, and 2/3 sides of the circumference of the cylindrical body of the inner tube member 12 according to internal conditions, the porous holes Through (11A-N), the high-temperature cooling gas is quickly discharged to the outside.

In other words, in the inner tube member 12, the porous holes 11A-N having a certain diameter are formed to be more concentrated per unit area as the closer to the antenna member 6 is, the more the periphery of the antenna member 6 is. Since the high heat is rapidly discharged to the outside, the high heat generated inside the inner tube member 12 blocks the RF frequency from affecting the function of being emitted to the accelerator tube through the antenna member 6 as much as possible.

On the other hand, when the inner tube member 12 discharges high heat through the porous holes 11A-N formed in the body as described above, the outer tube member 10 having the inner tube member 12 is also formed in the body. The high-heat cooling gas discharged through the inner tube member 12 through the guide grooves 9A-N is rapidly discharged to the outside. That is, the outer tube member 10 has a plurality of guide grooves 9A-N of a certain size in a spiral shape to have a certain inclination on the inner surface thereof. At this time, the porous hole of the inner tube member 12 Since the high-heat cooling gas discharged from 11A-N is completely discharged to the outside along the shape of the spiral-shaped guide groove 9A-N, the vacuum state of the first input coupler 1 is stabilized. In this process, since the guide grooves 9A-N of the outer tube member 10 are formed at the corresponding positions of the porous holes 11A-N of the inner tube member 12, the inner tube member 12 Since the cooling gas of high heat discharged from the porous hole 11A-N immediately moves along the guide groove 9A-N, the high heat can be discharged more quickly.

1: input coupler 2: first coupler module
3: second coupler module 4: third coupler module
5: Acceleration pipe connection part 6: Antenna member
7: antenna tip member 8: RF window member
9A-B: guide groove 10: outer tube member
11: Porous hole 12: Inner tube member
13: superconducting acceleration pipe connection flange 14: low temperature maintenance module outer wall connection flange
15: support disk 16: second through hole
17: transmission line connection flange 18: RF input flange
19: outer ring 20: second outer conductor
21: second front end connecting flange 22: second rear end connecting flange
23: third front end connection flange 24: vacuum measuring equipment connection port
25: coaxial line

Claims (7)

A high-output input coupler for an acceleration tube comprising a first coupler module, a second coupler module, and a third coupler module,
The first coupler module includes an acceleration pipe connection part having one end of the body connected to the acceleration pipe in a cylindrical shape; an antenna member positioned at the center of the accelerator tube connection portion to emit a high-energy RF signal to the accelerator tube; an antenna tip member formed in the center of the accelerator pipe connection part to couple the antenna member; an outer tube member formed in a cylindrical shape between the accelerator pipe connection part and the RF window member of the second coupler module to form a body of the first coupler module and having a hollow inside; It is formed in the inner center of the outer tube member in the shape of a hollow rod and is configured to include an inner tube member in which a plurality of porous holes for discharging cooling gas inside are formed along the circumference of the body,
The outer tube member is formed with a plurality of guide grooves of a predetermined size on the inner surface of the body,
The guide groove of the outer tube member is a high-output input coupler for an acceleration tube, characterized in that the inner surface is formed in a spiral shape to have a certain inclination. The method of claim 1,
A high-power input coupler for acceleration tube, characterized in that the inner tube member has a porous hole having a certain diameter, which is arranged more concentrated per unit area as it approaches the antenna member. The method of claim 1,
The porous hole of the inner tube member is a high-output input coupler for acceleration tube, characterized in that the larger the diameter of the porous hole as it approaches the antenna member. delete delete The method of claim 1,
A high-output input coupler for an acceleration tube, characterized in that a guide groove of the outer tube member is formed at a position corresponding to the porous hole of the inner tube member. The method of claim 1,
The porous hole of the inner tube member is a high-power input coupler for an acceleration tube, characterized in that only one of 1/3, 1/2, and 2/3 surfaces of the cylindrical body of the inner tube member are selectively formed.

Images