CN113597082A - Standing wave accelerating tube and radiation equipment - Google Patents

Abstract

The embodiment of the application discloses standing wave accelerating tube and radiation equipment, relates to the radiation field, and solves the problem that the vacuum state of the existing accelerating tube is easy to damage due to energy adjustment. The application provides a standing wave accelerating tube, including the casing, have the vacuum chamber in the casing, the casing corresponds the vacuum chamber and is equipped with a radio frequency power coupling mouth at least, is equipped with between radio frequency power coupling mouth and the vacuum chamber to be used for the sealed sealing member of vacuum chamber, and the sealing member can make radio frequency power pass, and radio frequency power coupling mouth is provided with the switch module for open or close radio frequency power coupling mouth. The standing wave acceleration tube of the present application is used to accelerate particles.

Description

Standing wave accelerating tube and radiation equipment

Technical Field

The embodiment of the application relates to but is not limited to the radiation field, especially relates to a standing wave accelerating tube and radiation equipment.

Background

The standing wave accelerating tube is a core component of an industrial flaw detection accelerator and a medical electron linear accelerator, electrons emitted by an electron gun are accelerated to required energy through the standing wave accelerating tube, and then the electrons are shot to a metal tungsten target to generate X-rays (X-ray), so that Radiographic Testing (RT) is performed on a workpiece or Radiotherapy (RT) is performed on a tumor patient. In the field of industrial flaw detection, tests need to be carried out on workpieces of different materials and thicknesses, in the field of radiotherapy, treatments need to be carried out on tumors of different types, different depths and different positions, and an accelerating tube capable of switching and outputting high-low multi-level energy of different megaelectron volts (MeV) and even kiloelectron volts (keV) is a key for solving the requirements.

At present, energy switches are mainly used in a method for switching output of high-low multi-level energy, and various acceleration structure schemes with the energy switches are proposed, wherein most of the schemes are based on a mode that a detuning short-circuit rod is inserted into a certain coupling cavity of an acceleration structure, so that the distribution of an acceleration electric field in a rear acceleration cavity is changed, and output energy is changed. Because the structure during operation need keep in vacuum state with higher speed, in order to realize the motion in vacuum of detuning shorting bar, need be connected detuning shorting bar and vacuum bellows, detuning shorting bar gets into the structure coupling chamber with higher speed when vacuum bellows is compressed, and detuning shorting bar withdraws from the coupling chamber when vacuum bellows is stretched.

Because the vacuum bellows needs to be compressed back and forth during energy switching, the service life of the bellows is shortened even the bellows is damaged after long-term use, and the vacuum state of the whole accelerating tube is damaged.

Disclosure of Invention

The embodiment of the application provides a standing wave accelerating tube and radiation equipment has good leakproofness when being convenient for energy control, and intraductal vacuum state is difficult to be destroyed.

In a first aspect, an embodiment of the present application provides a standing wave accelerating tube, which includes a housing, a vacuum chamber is formed in the housing, at least one rf power coupling port is formed in the housing corresponding to the vacuum chamber, a sealing member for sealing the vacuum chamber is disposed between the rf power coupling port and the vacuum chamber, the sealing member ensures a sealing state of the vacuum chamber and allows rf power to pass through, and the rf power coupling port is provided with a switch assembly for opening or closing the rf power coupling port.

The standing wave accelerating tube provided by the embodiment of the application provides a corresponding place for particle acceleration and provides an installation space for related components by arranging the shell, a radio frequency electromagnetic field is arranged in the shell and used for particle acceleration, the vacuum state of the vacuum chamber provides corresponding conditions for particle acceleration, the vacuum degree of the vacuum chamber is a key factor influencing the acceleration effect of the device, the radio frequency power coupling port can partially transmit the radio frequency power in the vacuum chamber, so that the energy of the particles finally output by the standing wave accelerating tube is adjusted, the sealing member is arranged to separate the vacuum chamber from the outside, the sealing performance of the vacuum chamber is ensured while the radio frequency power can pass through, the switch assembly is arranged outside the shell, the related operation can not influence the sealing of the vacuum chamber, compared with the scheme of using a corrugated pipe in the related technology, the sealing member seals the radio frequency power coupling port, and the switch assembly is externally arranged, so that the influence on the vacuum chamber is avoided, the sealing performance of the vacuum chamber is effectively improved, and the vacuum state in the accelerating tube is powerfully guaranteed.

In one possible implementation manner of the present application, the switch assembly includes a blocking piece and a driving piece, and the driving piece is used for driving the blocking piece to move at the rf power coupling port so as to open and close the rf power coupling port.

In the standing wave accelerating tube provided by the embodiment of the application, the driving assembly can drive the baffle plate to move, when the driving assembly drives the baffle plate to move to cover the radio frequency power coupling port, the strength of the radio frequency electromagnetic field in the shell is not changed, and high-energy electron beams are finally generated.

In a possible implementation manner of the present application, the separation blade is provided with a notch, the separation blade cover is disposed at the rf power coupling port, and the driving member is configured to drive the separation blade to rotate around the center thereof, so as to align the notch with the rf power coupling port, or align the separation blade with the rf power coupling port.

In the standing wave accelerating tube provided by the embodiment of the application, the driving piece can drive the baffle to rotate, in the rotating process of the baffle, the notch on the baffle is periodically aligned with the radio frequency power coupling port, when the notch is aligned with the radio frequency power coupling port, part of radio frequency power of the radio frequency electromagnetic field in the shell is transmitted out through the radio frequency power coupling port, the radio frequency electromagnetic field in the rear section of the accelerating tube is weakened, the standing wave accelerating tube finally generates low-energy electron beams, otherwise, the baffle is aligned with the radio frequency power coupling port, the radio frequency power coupling port is shielded, the strength of the radio frequency electromagnetic field in the shell is not changed, and the standing wave accelerating tube finally generates high-energy electron beams.

In one possible implementation manner of the present application, the barrier is embedded with a penetration region, the penetration region is made of an insulating material, and the driving member is configured to drive the barrier to rotate around the center of the barrier, so as to align the penetration region with the rf power coupling port, or align the barrier with the rf power coupling port.

In the standing wave accelerating tube provided in the embodiment of the present application, the barrier is configured to block radio frequency power from being transmitted from the radio frequency power coupling port, the penetration region allows radio frequency power to pass through, when the driving member drives the barrier to rotate, the penetration region is periodically aligned with the radio frequency power coupling port, when the penetration region is aligned with the radio frequency power coupling port, a part of radio frequency power of the radio frequency electromagnetic field in the housing is transmitted through the radio frequency power coupling port, a radio frequency electromagnetic field in a rear section of the accelerating tube is weakened accordingly, the standing wave accelerating tube finally generates a low-energy electron beam, otherwise, when the barrier is aligned with the radio frequency power coupling port, the strength of the radio frequency electromagnetic field in the housing is not changed, the standing wave accelerating tube finally generates a high-energy electron beam, the center of gravity of the barrier is stable, and the rotation process is more stable.

In one possible implementation of the present application, the flap has at least one notch or penetration zone.

In the standing wave accelerating tube provided by the embodiment of the application, the baffle plate can be provided with a plurality of gaps or penetrating areas, and under the condition that the rotating speed of the driving piece is not changed, the radio frequency power coupling port can be opened and closed for many times in each movement period of the baffle plate through the plurality of gaps or the penetrating areas, so that the efficiency of switching high energy and low energy of the accelerating tube is improved.

In one possible implementation of the present application, the driving member is a motor, and an output shaft of the motor is connected to a central axis of the blocking piece.

At the standing wave accelerating tube that this application embodiment provided, the driving piece adopts the motor, compares in the motion time of bellows second level, and the motor can reach higher motion frequency for the standing wave accelerating tube can accomplish fast and the periodic switching high-low grade energy, thereby has further promoted the accelerating tube and has switched the efficiency of high-low energy.

In a possible implementation manner of the application, the switch assembly further comprises a support, the support provides support for each part of the switch assembly, one end of the support is fixed at the radio frequency power coupling port of the shell, and the other end of the support is bent to form a motor mounting plate for mounting a motor.

The standing wave accelerating tube that provides in this application embodiment forms a semi-enclosed structure through bending the support setting, installs the motor in the inboard, for the motor provides certain protection, promotes this application switch module's anti-risk ability.

The support includes the separation blade mounting panel fixed with the casing, and the separation blade mounting panel is parallel with the motor mounting panel, corresponds the radio frequency power coupling mouth on the separation blade mounting panel and is equipped with the through-hole, and the separation blade is used for opening and closes the through-hole.

At the standing wave accelerating tube that this application embodiment provided, separation blade mounting panel and motor mounting panel parallel arrangement, the output shaft and the separation blade mounting panel of the motor of being convenient for are perpendicular, make separation blade and separation blade mounting panel keep parallel, reduce the interference that the support caused the separation blade motion, and the separation blade mounting panel can cover the radio frequency power coupling mouth after installing in the casing, consequently sets up the through-hole and makes radio frequency power can be spread smoothly.

In one possible implementation manner of the present application, the separation blade mounting plate is provided with a plurality of conductive protrusions, the separation blade is made of a conductive material, and the separation blade is electrically connected with the separation blade mounting plate through the plurality of conductive protrusions.

In the standing wave accelerating tube provided by the embodiment of the application, the conductive protrusion is arranged, when the blocking piece closes the radio frequency power coupling port, the blocking piece is electrically connected with the edge of the through hole through the conductive protrusion, and therefore the radio frequency power in the shell is prevented from being transmitted out.

In a possible implementation manner of the present application, a radio frequency power absorption load is disposed outside the radio frequency power coupling port of the housing, and when the radio frequency power coupling port is opened by the switch assembly, a radio frequency power flow channel is formed between the radio frequency power absorption load and the vacuum chamber.

The standing wave accelerating tube provided by the embodiment of the application absorbs the radio frequency power in the vacuum chamber through the radio frequency power absorption load, and effectively avoids leakage of the radio frequency power.

In one possible implementation of the present application, the radial dimension of the rf power absorbing load decreases gradually in a direction away from the rf power coupling port.

In the standing wave accelerating tube provided by the embodiment of the application, the outline of the radio frequency power absorption load is gradually contracted, so that the arrangement of the driving piece is convenient, the whole device is more compact and smaller, and meanwhile, raw materials are also saved.

In a second aspect, embodiments of the present application provide a radiation apparatus, including a particle generator, a converter, and a standing wave acceleration tube, where the standing wave acceleration tube accelerates an electron beam emitted by the particle generator and converts the electron beam into radiation through the converter.

The radiation equipment provided by the embodiment of the application has the same technical effect that the sealing state of the vacuum chamber is not influenced by the external switch assembly due to the standing wave accelerating tube in any one of the first aspects, and meanwhile, the energy of the electron beam can be rapidly and periodically changed, so that radiation with different energy can be output.

Drawings

Fig. 1 is a schematic structural diagram of a standing wave accelerating tube and a radiation apparatus according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of an internal structure of a standing wave accelerating tube and a radiation apparatus according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a switch assembly of a standing wave accelerating tube and a radiation device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a support of a standing wave accelerating tube and a radiation apparatus according to an embodiment of the present disclosure;

fig. 5 is a schematic view of a baffle structure of a standing wave accelerating tube and a radiation apparatus according to an embodiment of the present disclosure.

Reference numerals:

1-a shell; 11-a vacuum chamber; 12-a radio frequency power coupling port; 13-a seal; 2-a switching assembly; 21-a baffle plate; 211-notch; 212-penetration zone; 22-a drive member; 23-a scaffold; 231-a motor mounting plate; 232-baffle mounting plate; 233-through holes; 234-conductive bumps; 3-radio frequency power absorbing load; 4-a particle generator; 5-a converter; 6-rotating shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.

In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.

In addition, in the embodiments of the present application, directional terms such as "upper", "lower", "left", and "right" are defined with respect to the schematically-placed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for descriptive and clarifying purposes, and may be changed accordingly according to changes in the orientation in which the components are placed in the drawings.

In the embodiments of the present application, unless otherwise explicitly specified or limited, the term "connected" is to be understood broadly, for example, "connected" may be a fixed connection, a detachable connection, or an integral body; may be directly connected or indirectly connected through an intermediate.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The embodiment of the application provides a radiation device, which is a type of radiation device with a particle acceleration function and capable of generating corresponding radioactive rays, and the radiation device can be a radiation device such as a ray detector, a foreign matter detector and a gamma knife.

Referring to fig. 1, in the present embodiment, the irradiation apparatus includes a shield (not shown), a particle generator 4, an accelerator, and a converter 5.

A shield for preventing radiation generated by the apparatus from leaking out, such as a shield case; the particle generator 4 is used for generating a particle beam with certain energy, certain beam current and certain speed, such as an electron gun and the like; the converter 5 is for converting the electron beam into a ray, such as an X-ray conversion target or the like; the accelerator is used to converge and accelerate a particle beam, and generally, the accelerator is classified into a linear accelerator, a cyclotron, and the like according to a motion trajectory of a particle to be accelerated.

In this embodiment, use linear accelerator as an example, the accelerator includes accelerating tube, and accelerating tube includes casing 1, has vacuum chamber 11 in the casing 1, and vacuum chamber 11 is formed by connecting gradually a plurality of bunch chambeies and a plurality of chamber of accelerating, and the bunch chamber is used for carrying out vertical bunch to the electron beam, and the chamber of accelerating is used for accelerating the electron beam, and wherein the bunch chamber coupling that is close to the chamber of accelerating has the waveguide, and the waveguide is used for feeding in the radio frequency power of accelerating the electron beam.

Referring to fig. 1 and 2, the housing 1 is provided with at least one rf power coupling port 12 corresponding to the vacuum chamber 11, when the rf power coupling port 12 is opened, a part of rf power of the rf electromagnetic field in the housing 1 is transmitted out through the rf power coupling port 12, the rf electromagnetic field in the rear section of the accelerating tube is weakened, the standing wave accelerating tube finally generates low-energy electron beams, and conversely, when the rf power coupling port 12 is closed, the strength of the rf electromagnetic field in the housing 1 is not changed, and the standing wave accelerating tube finally generates high-energy electron beams.

Fig. 2 shows only one rf power coupling port 12, which should not be considered as a special limitation to the present application, and when a plurality of rf power coupling ports 12 are provided, each rf power coupling port 12 may be opened and closed at the same time or at different times, so that the present device can generate multiple energy rays.

Referring to fig. 2, a sealing member 13 for sealing the vacuum chamber 11 is disposed between the rf power coupling port 12 and the vacuum chamber 11, the sealing member 13 ensures the sealing state of the vacuum chamber 11 and allows the rf power to pass through, and preferably, the sealing member 13 is made of a ceramic material, which has an advantage of not affecting the transmission of the rf power.

Referring to fig. 1, the rf power coupling port 12 is provided with a switch assembly 2 for opening or closing the rf power coupling port 12, and since the switch assembly 2 is installed outside the housing 1, it operates in the atmosphere and does not affect the vacuum state of the vacuum chamber 11.

It should be noted that, when the vacuum chamber 11 is provided with a plurality of rf power coupling ports 12, and thus a plurality of switch assemblies 2 are correspondingly provided, the operating frequencies of the driving members 22 in the switch assemblies 2 may be the same or different, and the combination of the plurality of switch assemblies 2 may form a plurality of energy rays for being alternately output.

Fig. 1 only shows the case where the acceleration tube includes two switch assemblies 2, and the two switch assemblies 2 are distributed on two sides of the acceleration tube, which is not to be considered as a specific limitation to the present application, and in the present application, the switch assemblies 2 may be disposed on the same side of the acceleration tube, or disposed on two sides of the acceleration tube, and may be symmetrically distributed, or may be alternately distributed.

The switch assembly 2 has a plurality of implementation manners, such as a plunger type and a barrier type, referring to fig. 3, in this embodiment, taking the barrier type as an example, the switch assembly 2 includes a barrier 21 and a driving member 22, the barrier 21 is used for blocking the rf power coupling port 12, the barrier 21 is made of a conductive material, so that when the barrier 21 blocks the rf power coupling port 12, the edge of the rf power coupling port 12 is electrically connected, thereby preventing the rf power in the housing 1 from being transmitted from the rf power coupling port 12, the driving member 22 is used for driving the barrier 21 to move in the rf power coupling port 12, so as to open and close the rf power coupling port 12, and the driving member 22 can drive the barrier 21 to move in the rf power coupling port 12 periodically, thereby opening or closing the rf power coupling port 12 periodically.

The driving member 22 can be any device capable of providing power, and the power output provided by the driving member 22 can be in a reciprocating type, such as a telescopic rod including an electric telescopic rod, a pneumatic telescopic rod and the like, or a rotating type, such as a motor including a servo motor, a stepping motor and the like.

In some embodiments of the present application, the driving member 22 is a motor, on this basis, an output shaft of the motor is in transmission connection with the blocking sheet 21, an output end of the motor is connected to a central axis of the blocking sheet 21, the motor can drive the blocking sheet 21 to rotate around an axis of the output shaft, the blocking sheet 21 periodically blocks the rf power coupling port 12 during rotation, so as to open or close the rf power coupling port 12, the rf power coupling port 12 is open, the apparatus outputs a ray with lower energy, the rf power coupling port 12 is closed, and the apparatus outputs a ray with higher energy.

The motor is preferably a servo motor, and the rotating speed of the servo motor can be dozens of hundreds of revolutions per second, so that rapid and periodic energy switching can be realized, and the efficiency of switching high and low energy of the accelerating tube is improved; meanwhile, the servo motor has the advantages of stable operation and constant output torque.

The output shaft of the servo motor is in transmission connection with the baffle 21, and various realization modes can be provided as long as the transmission of the rotation torque can be realized. Illustratively, the servo motor is fixedly connected with the blocking piece 21 through a transmission shaft, it should be noted that the transmission shaft may be the transmission shaft of the motor, or may be the independent rotating shaft 6, or a shaft fixedly connected with the blocking piece, or the output shaft of the servo motor is connected with the blocking piece 21 through a transmission mechanism.

The output shaft of the servo motor is fixedly connected with the baffle 21, and the output shaft can be directly connected, such as welded, fastened and the like, or indirectly connected, such as connected through a coupling and the like; the servo motor is connected with the baffle 21 through a transmission mechanism, and the transmission mechanism can be a gear structure and the like, such as a speed reducer and the like.

In some embodiments of the present application, the driving member 22 may be a telescopic rod, and the telescopic rod drives the blocking sheet 21 to reciprocate, so that the blocking sheet 21 opens or closes the rf power coupling port 12, the rf power coupling port 12 opens, the apparatus outputs a ray with lower energy, the rf power coupling port 12 closes, and the apparatus outputs a ray with higher energy.

In some embodiments of the present application, the blocking plate 21 is circular, and it should be noted that the blocking plate 21 may be in a shape that can periodically cover the rf power coupling port 12 during other movements, such as square, diamond, etc.

In addition, it should be noted that, in some embodiments of the device, corresponding limiting grooves, limiting blocks, and the like may be arranged to limit the movement of the blocking sheet, so as to improve the movement accuracy of the blocking sheet.

Referring to fig. 3, in an embodiment of the present application, the baffle 21 has at least one notch 211, the baffle 21 is disposed in the rf power coupling port 12, the driving member 22 drives the baffle 21 to rotate around its center, when the notch 211 is aligned with the rf power coupling port 12, a part of the rf power of the rf electromagnetic field in the housing 1 is transmitted through the rf power coupling port 12, the rf electromagnetic field in the rear section of the accelerator is weakened, the standing wave accelerator finally generates a low-energy electron beam, and when the baffle 21 is aligned with the rf power coupling port 12, the strength of the rf electromagnetic field in the housing 1 is not changed, and the standing wave accelerator finally generates a high-energy electron beam.

In this embodiment, the notch 211 is shaped like a sector, it should be noted that the notch 211 may also be shaped like other shapes that do not affect the rf power transmission, such as a circle, an ellipse, etc., and the notch 211 may or may not be opened at the edge of the blocking plate 21.

Referring to fig. 5, in another embodiment of the present application, the baffle 21 is embedded with a penetrating region 212, the penetrating region 212 is made of an insulating material, the driving member 22 is configured to drive the baffle 21 to rotate around its center, when the penetrating region 212 is aligned with the rf power coupling port 12, a part of the rf power of the rf electromagnetic field in the housing 1 is transmitted through the rf power coupling port 12, the rf electromagnetic field in the rear section of the accelerator tube is weakened accordingly, and the standing wave accelerator tube finally generates a low-energy electron beam, whereas when the baffle 21 is aligned with the rf power coupling port 12, the strength of the rf electromagnetic field in the housing 1 is not changed, and the standing wave accelerator tube finally generates a high-energy electron beam.

It should be noted that the conductive material in the embodiments of the present application includes any material that can be used for carrying and conducting electric current, such as metal, conductive rubber, etc.; the insulating material is a material that is not electrically conductive at the operating voltage, rather than an absolute electrically non-conductive material.

It should be noted that the blocking sheet 21 may have one notch 211 or penetrating region 212, or may have a plurality of notches 211 or penetrating regions 212, the plurality of notches 211 or penetrating regions 212 may be distributed symmetrically or asymmetrically, and when the blocking sheet 21 has a plurality of notches 211 or penetrating regions 212, the blocking sheet 21 may open and close the rf power coupling port 12 for a plurality of times in each movement cycle, thereby improving the efficiency of switching high and low energies of the accelerator.

Referring to fig. 3 and 4, in an embodiment of the present application, the switch assembly 2 further includes a bracket 23, the bracket 23 provides a support for each component of the switch assembly 2, one end of the bracket 23 is fixed at the rf power coupling port 12 of the housing 1, and the other end of the bracket 23 is bent to form a motor mounting plate 231 for mounting a motor, and the bracket 23 is bent to form a half-enclosed structure, so as to mount the motor on the inner side, provide a certain protection for the motor, and improve the risk resistance of the switch assembly 2 of the present application.

The connection of motor and motor mounting panel 231 can have multiple forms as long as can be fixed in support 23 with the motor can, and the motor can adopt horizontal installation, also can adopt vertical installation, and exemplarily, the motor can pass through bolted connection in support 23, perhaps sets up the draw-in groove on motor mounting panel 231, with motor joint in support 23 etc..

It should be noted that the bracket 23 is any structure that facilitates the installation of the switch assembly 2 and its components, such as a support rod, a support plate, etc., and in some embodiments, the bracket 23 may be in the form of a housing having a receiving space, so that the driving member 22 is disposed in the receiving space of the housing, and has a certain dustproof function.

Referring to fig. 3 and 4, the bracket 23 includes a baffle mounting plate 232 fixed to the housing 1, the baffle mounting plate 232 facilitates to fixedly connect the bracket 23 to the housing 1, and the baffle mounting plate 232 is parallel to the motor mounting plate 231, so that the motor is vertically mounted to the motor mounting plate 231, and thus the baffle 21 is kept parallel to the baffle mounting plate 232, and interference of the bracket 23 to movement of the baffle 21 is reduced.

The fixed connection between the baffle plate mounting plate 232 and the housing 1 may be direct connection, such as welding, gluing, or detachable connection such as bolt connection.

Referring to fig. 3 and 4, the baffle mounting plate 232 is provided with a through hole 233 corresponding to the rf power coupling port 12, the baffle 21 is used for opening and closing the through hole 233, and further opening or closing the rf power coupling port 12, and the through hole 233 is provided so that the rf power can be smoothly transmitted without being blocked by the baffle mounting plate 232.

It should be noted that the through hole 233 may have various shapes, and any shape that does not affect the transmission of the rf power from the through hole 233 may be adopted, such as an elliptical hole, a kidney-shaped hole, and the like, and preferably, the through hole 233 should have the same shape as the rf power coupling port 12, and the size should be greater than or equal to the size of the rf power coupling port 12.

Referring to fig. 4, in an embodiment of the present application, the baffle mounting plate 232 is provided with a plurality of conductive protrusions 234, the conductive protrusions 234 are disposed around the through hole 233, the baffle 21 is electrically connected to the baffle mounting plate 232 through the plurality of conductive protrusions 234, and the conductive protrusions 234 are electrically connected to the vacuum chamber 11, when the baffle 21 closes the rf power coupling port 12, the baffle 21 electrically connects the edge of the through hole 233 through the conductive protrusions 234, thereby preventing the rf power in the housing 1 from being transmitted out.

The conductive bump 234 may be electrically connected to the vacuum chamber 11 by penetrating the baffle mounting plate 232 and directly contacting the rf power coupling port 12, or by providing the baffle mounting plate 232 as a conductive material, or by indirectly connecting the baffle mounting plate 232 with a wire or the like.

Referring to fig. 1, in an embodiment of the present application, a radio frequency power absorption load 3 is disposed outside a radio frequency power coupling port 12 of a housing 1, when the radio frequency power coupling port 12 is opened by a switch assembly 2, a radio frequency power circulation channel is formed between the radio frequency power absorption load 3 and a vacuum chamber 11, the radio frequency power absorption load 3 is configured to absorb all transmitted radio frequency power without reflection, and the radio frequency power absorption load 3 absorbs radio frequency power in the vacuum chamber 11, so as to effectively avoid leakage of the radio frequency power.

The rf power absorbing load 3 in fig. 1 has a square structure, which is not to be considered as a specific limitation of the present application, and the rf power absorbing load 3 in the present application may have any shape with an opening and a cavity, such as a column shape, a sphere shape, etc.

Referring to fig. 1, in one embodiment of the present application, the radial dimension of the rf power absorbing load 3 is gradually reduced in a direction away from the rf power coupling port 12, so as to facilitate the arrangement of the driving member 22, thereby making the whole device more compact and saving raw materials.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (12)

1. A standing wave acceleration tube, comprising:

the shell is internally provided with a vacuum chamber, and at least one radio frequency power coupling port is arranged in the shell corresponding to the vacuum chamber;

a seal disposed between the rf power coupling port and the vacuum chamber for sealing the vacuum chamber and allowing rf power to pass therethrough;

and the switch component is arranged at the radio frequency power coupling port and used for opening or closing the radio frequency power coupling port.

2. The standing wave accelerator tube of claim 1, wherein the switch assembly comprises a shutter and a driving member, and the driving member is configured to drive the shutter to move at the rf power coupling port to open and close the rf power coupling port.

3. The standing wave accelerator tube of claim 2, wherein the blocking plate has a notch, the blocking plate cover is disposed at the rf power coupling port, and the driving member is configured to drive the blocking plate to rotate around a center thereof, so as to align the notch with the rf power coupling port or align the blocking plate with the rf power coupling port.

4. The standing wave accelerator tube of claim 2, wherein the baffle plate is embedded with a penetration region, the penetration region is made of an insulating material, and the driving member is configured to drive the baffle plate to rotate around the center thereof, so as to align the penetration region with the rf power coupling port or align the baffle plate with the rf power coupling port.

5. The standing wave acceleration tube of claim 3 or 4, characterized in that the baffle has at least one of the notches or the penetration areas.

6. The standing wave acceleration tube of claim 5, characterized in that the driving member is a motor, and an output shaft of the motor is connected to a central axis of the baffle.

7. The standing wave accelerator tube of claim 6, wherein the switch assembly further comprises a bracket, one end of the bracket is fixed at the rf power coupling port of the housing, and the other end of the bracket is bent to form a motor mounting plate for mounting the motor.

8. The standing wave acceleration tube of claim 7, wherein the bracket comprises a baffle mounting plate fixed to the housing, the baffle mounting plate being parallel to the motor mounting plate, the baffle mounting plate being provided with a through hole corresponding to the rf power coupling port, the baffle being configured to open and close the through hole.

9. The standing wave acceleration tube of claim 8, wherein the baffle mounting plate is provided with a plurality of conductive protrusions, the baffle being made of a conductive material, the baffle being electrically connected to the baffle mounting plate through the plurality of conductive protrusions.

10. The standing wave accelerator according to any one of claims 1 to 9, wherein an rf power absorption load is disposed outside the rf power coupling port of the housing, and when the rf power coupling port is opened by the switch assembly, an rf power flow channel is formed between the rf power absorption load and the vacuum chamber.

11. The standing wave accelerator tube of claim 10, wherein the radial dimension of the rf power absorbing load decreases in a direction away from the rf power coupling port.

12. An irradiation apparatus, comprising:

a particle generator;

a converter;

the standing wave accelerator of any one of claims 1 to 11, which accelerates the electron beam emitted from the particle generator and converts the electron beam into radiation by the converter.

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