TW202436906A - Beam detection device - Google Patents

Abstract

The present application relates to a beam detection device, comprising: an adjustment assembly, comprising a supporting unit fixed at a beam outlet, and further comprising at least one of a first adjustment unit and a second adjustment unit, at least one of the first adjustment unit and the second adjustment unit being connected to the supporting unit; a mounting assembly, detachably connected to the adjustment assembly; a detection element, fixed to the mounting assembly, the first adjustment unit and the second adjustment unit being used for adjusting the position of the detection element in different directions. According to the beam detection device of the present application, an operator can mount the detection element at a place far away from an irradiation system, and can quickly and conveniently adjust the position of the detection element in different directions by using the adjustment assembly at a position close to the beam outlet of the irradiation system, thereby improving the detection efficiency and effectively reducing the exposure dose of the operator at the beam outlet.

Description

Beam detection device

The present application relates to the field of beam detection technology, and in particular to a beam detection device.

With the development of atomic science, radiation therapy such as cobalt-60, linear accelerator, and electron beam has become one of the main means of cancer treatment. On the one hand, radiotherapy includes photon or electron therapy. Due to the limitations of the physical conditions of radiation itself, while killing tumor cells, it will also cause damage to a large number of normal tissues in the beam path; in addition, due to the different sensitivity of tumor cells to radiation, the treatment effect is often poor for malignant tumors that are more resistant to radiation (such as glioblastoma multiforme and melanoma). On the other hand, considering the above problems, the concept of targeted therapy in chemotherapy is applied to radiation therapy. Targeting tumor cells with high radiation resistance, radiation sources with high relative biological effectiveness (RBE) are currently being actively developed, such as proton therapy, heavy particle therapy, and neutron capture therapy.

Before actual radioactive irradiation, the beam parameters need to be tested by detection equipment to determine whether the beam parameters meet the requirements. The detection equipment needs to be installed and aligned with the beam outlet during the test. The conventional detection tool use process requires a lot of time to adjust the position of the detection equipment, especially when it is necessary to switch between different detection equipment many times, the work efficiency is low; at the same time, multiple adjustments and switches also increase the radiation exposure risk of workers.

Based on this, it is necessary to provide a beam detection device with high efficiency, accuracy and safety to address the above problems.

On one hand, the present application provides a beam detection device, comprising: an adjustment assembly, comprising a support unit fixed at a beam exit, and also comprising at least one of a first adjustment unit and a second adjustment unit, wherein at least one of the first adjustment unit and the second adjustment unit is connected to the support unit; a mounting assembly, detachably connected to the adjustment assembly; a detection element, fixed on the mounting assembly; the first adjustment unit and the second adjustment unit adjust the position of the detection element along different directions, specifically, the first adjustment unit adjusts the position of the detection element along a first direction, and the second adjustment unit is used to adjust the position of the detection element along a second direction, so that the detection element is located at a target position capable of beam detection; the first direction and the second direction are perpendicular.

In one embodiment, the first adjustment unit is connected to the mounting assembly, and the first adjustment unit is used to drive the mounting assembly to move relative to the support unit along a first direction. Furthermore, the first direction is a horizontal direction parallel to the plane where the beam outlet is located.

In one embodiment, the support unit is provided with a guide groove extending along a first direction, the first adjustment unit includes a first moving block matched with the guide groove and a first driving member for driving the first moving block to move along the guide groove, and the first moving block is connected to the mounting assembly. Furthermore, the first driving member moves under the action of an external force, driving the first moving block to move in the guide groove and further driving the mounting assembly to move along the first direction. The first moving block is directly or indirectly connected to the mounting assembly.

In one embodiment, the second adjusting unit is connected to the first moving block. Furthermore, the mounting assembly is indirectly connected to the first moving block via the second adjusting unit, and driven by the movement of the first moving block, the second adjusting unit and the mounting assembly as a whole move along the first direction.

In one embodiment, the mounting assembly is detachably connected to the second adjusting unit, and the second adjusting unit is connected to the first adjusting unit. Furthermore, the mounting assembly includes a first connecting member, and the first connecting member and the second adjusting unit are detachably connected. The second adjusting unit includes a second connecting member for connecting to the first connecting member, and the first connecting member and the second connecting member are connected by a snap-fitting manner.

In one embodiment, the second adjustment unit includes a second moving block and a second driving member for driving the second moving block to move relative to the support unit along a second direction, and the mounting assembly is detachably connected to the second moving block. Further, the second moving block is arranged at one end of the second driving member, and the second driving member moves along the second direction and drives the second moving block to move. Further, the second connecting member is arranged on the second moving block, and the mounting assembly is detachably connected to the second moving block through the second connecting member. Further, the second direction is a vertical direction parallel to the plane where the beam outlet is located.

In one embodiment, the second moving block is connected to the first adjusting unit. Furthermore, the second driving member is connected to the first moving block, and at least one of the second moving block or the second driving member can move in a second direction relative to the first moving block. Furthermore, the first moving block is provided with a guide hole, and the second driving member is inserted into the guide hole and can move relative to the first moving block.

In one embodiment, the mounting assembly includes a bracket connected to the adjustment assembly and a mounting seat disposed on the bracket, the bracket at least partially surrounds the beam outlet, and the mounting seat is used to mount the detection element. Furthermore, the area of the area enclosed by the bracket is larger than the area of the beam outlet.

In one embodiment, the bracket is provided with a first connector, and the first connector is detachably connected to the adjustment assembly. Furthermore, the bracket has at least a first frame connected to one of the first adjustment unit and the second adjustment unit, and the bracket has at least a second frame provided with a mounting seat. Furthermore, the first frame is provided with a first connector, and the first connector is connected to the first adjustment unit or the second adjustment unit.

In one embodiment, the mounting seat includes at least one mounting portion, and the mounting portion is used to mount the detection element. Furthermore, the mounting portion includes a mounting hole provided on the mounting seat, and the mounting hole is used to connect the mounting needle or the detection element.

In one embodiment, the detection device further includes a locking member, which locks the mounting assembly and the adjusting assembly. Furthermore, the locking member is provided on the second adjusting unit, and is used to lock the position of the mounting assembly relative to the second adjusting assembly. Furthermore, the locking member is connected to the second moving block or the second connecting member, and is used to lock the position of the first connecting member relative to the second moving block or the second connecting member.

The above-mentioned beam detection device detachably mounts the detection element to the adjustment assembly through the mounting assembly, and uses the adjustment assembly to adjust the overall position of the mounting assembly and the detection element. The operator can install the detection element far away from the irradiation system, and use the adjustment assembly to quickly and conveniently adjust the position of the detection element in different directions near the beam exit of the irradiation system, thereby improving the efficiency of the detection installation and effectively reducing the exposure dose of the operator at the beam exit.

In order to make the above-mentioned purposes, features and advantages of the present application more clearly understandable, the specific implementation of the present application is described in detail below in conjunction with the attached drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and a person with ordinary knowledge in the field can make similar improvements without violating the connotation of the present application, so the present application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the attached drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection between two components or an interaction relationship between two components, unless otherwise clearly limited. For those with ordinary knowledge in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Referring to FIG. 3 , FIG. 3 shows a schematic diagram of the structure of a beam detection device in an embodiment of the present application. The beam detection device 10 of the present embodiment includes an adjustment assembly 100, a mounting assembly 200, and a detection element 300. The mounting assembly 200 is used to mount the detection element to the adjustment assembly 100, and the mounting assembly 200 is detachably connected to the adjustment assembly 100. The adjustment assembly 100 is used to adjust the position of the detection element 300 and/or the mounting assembly 200 relative to the beam outlet 37, as shown in FIG. 1 , so that the detection element 300 is located at a target position capable of completing the required beam detection.

As a preferred embodiment of the present invention, the irradiation system 1 is a boron neutron capture therapy (BNCT) system. The composition and principle of the irradiation system 1 are explained below using the BNCT system as an example.

The main principle of BNCT is that after the irradiated body M takes or injects a boron (B-10) drug, the boron (B-10) drug selectively accumulates in tumor cells. Then, the boron (B-10) drug has a high capture cross section for thermal neutrons, and generates two heavily charged particles, ⁴ He and ⁷ Li, through ¹⁰ B(n,α) ⁷ Li neutron capture and nuclear fission reaction. The average energy of the two heavily charged particles is about 2.33 MeV, and they have high linear energy transfer (LET) and short range characteristics. The total range of the two particles is about the size of a cell. Therefore, the radiation damage caused to the organism can be limited to the cellular level, and the purpose of locally killing tumor cells can be achieved without causing too much damage to normal tissues. By specifically accumulating boron-containing drugs in tumor cells, combined with precise neutron beam control, it provides a better cancer treatment option than traditional radiation.

As shown in FIG2 , the neutron generating device 20 includes an accelerator 21, a beam transmission device 22 and a target T. The accelerator 21 accelerates charged particles (such as protons, deuterons, etc.) to generate charged particle beams P such as proton beams. The charged particle beams P irradiate the target T and interact with the target T to generate neutron beams (neutron beams) N. The target T is preferably a metal target. The appropriate nuclear reaction is selected based on the required neutron yield and energy, the energy and current of the accelerated charged particles that can be provided, and the physical and chemical properties of the metal target. The nuclear reactions that are often discussed are ⁷ Li(p,n) ⁷ Be and ⁹ Be(p,n) ⁹ B, both of which are endothermic reactions. The energy thresholds of the two nuclear reactions are 1.881MeV and 2.055MeV respectively. Since the ideal neutron source for BNC therapy is epithermal neutrons of keV energy level, theoretically, if protons with energy just slightly higher than the threshold are used to bombard lithium metal targets, relatively low-energy neutrons can be produced, which can be used clinically without much slow processing. However, the cross-sections of lithium metal (Li) and benium metal (Be) targets with protons of threshold energy are not high. In order to produce a sufficiently large neutron flux, protons with higher energy are usually selected to initiate nuclear reactions. The ideal target material should have high neutron yield, neutron energy distribution close to the epithermal neutron energy region, not too much strong penetrating radiation, safe, cheap, easy to operate and high temperature resistance. However, it is actually impossible to find a nuclear reaction that meets all the requirements. In this embodiment, a target material made of lithium metal is preferably used. However, as is well known to those skilled in the art, the material of the target T can also be made of metal materials other than lithium and curium, such as tantalum (Ta) or tungsten (W); the target T can be a disc, or other solid shapes, or a liquid (liquid metal). The accelerator 21 can be a linear accelerator, a cyclotron, a synchrotron, or a synchrocyclotron, and the neutron generating device 20 can also be a nuclear reactor instead of an accelerator and a target material.

Regardless of whether the neutron source of BNCT comes from a nuclear reactor or a nuclear reaction between charged particles in an accelerator and a target, what is actually produced is a mixed radiation field, that is, the beam contains neutrons and photons ranging from low energy to high energy. For BNCT of deep tumors, the more radiation content except epithermal neutrons, the greater the proportion of non-selective dose deposition in normal tissues. Therefore, the radiation content that will cause unnecessary dose deposition should be reduced as much as possible. The beam shaper 30 is used to adjust the beam quality of the neutron beam generated by the neutron generating device 20 and perform irradiation, reduce unnecessary dose deposition and converge the neutron beam, so that the neutron beam has a higher targeting during the treatment process.

Specifically, the end of the beam shaping body 30 close to the irradiated body M has a collimator 36 for converging the neutron beam. The neutron beam N generated by the neutron generating device 20 passes through the beam shaping body 30 and the beam outlet 37 in turn to irradiate the irradiated body M. The beam shaping body 30 can adjust the beam quality of the neutron beam N generated by the neutron generating device 20. Furthermore, the collimator 36 is arranged at the outlet of the beam shaping body 30, and the beam outlet 37 is the outlet of the collimator 36, which is used to converge the neutron beam N so that the neutron beam N has a higher targeting in the treatment process. It can be understood that the present embodiment may also not have a collimator, and the beam directly irradiates the irradiated body M after exiting the beam shaping body 30, and the beam outlet 37 is the outlet of the beam shaping body 30.

The beam shaper 30 further includes a reflector 31, a retarder 32, a thermal neutron absorber 33, a radiation shield 34 and a beam channel 35. Since the neutrons generated by the neutron generator 20 have a wide energy spectrum, in addition to epithermal neutrons that meet the treatment needs, it is necessary to reduce the content of other types of neutrons and photons as much as possible to avoid causing harm to the operator or the irradiated object. Therefore, the neutrons from the target T need to pass through the retarder 32 to adjust the fast neutron energy (>40keV) to the epithermal neutron energy region (0.5eV-40keV) and reduce the thermal neutrons (<0.5eV) as much as possible. The retarder 32 is made of a material with a large cross section for fast neutrons and a small cross section for epithermal neutrons. As a preferred embodiment, the retarder 32 is made of _D2O , _AlF3 , Fluental ^TM , CaF ₂ , Li ₂ CO ₃ , MgF ₂ and Al ₂ O ₃ ; the reflector 31 surrounds the retarder 32 and reflects the neutrons that diffuse around through the retarder 32 back to the neutron beam N to improve the utilization rate of the neutrons. The reflector 31 is made of a material with a strong neutron reflection ability. As a preferred embodiment, the reflector 31 is made of at least one of Pb or Ni; a thermal neutron absorber 33 is provided at the rear of the retarder 32. The thermal neutron absorber 33 is made of a material with a large cross-section for interacting with thermal neutrons. As a preferred embodiment, the thermal neutron absorber 33 is made of Li-6. The thermal neutron absorber 33 is used to absorb the thermal neutrons that pass through the retarder 32. The neutrons are used to reduce the content of thermal neutrons in the neutron beam N to avoid excessive dose caused by the interaction with shallow normal tissues during treatment. It can be understood that the thermal neutron absorber 33 can also be integrated with the retarder, and the material of the retarder contains Li-6; the radiation shielding body 34 is used to shield the neutrons and photons leaked from the outside of the beam channel 35. The material of the radiation shielding body 34 includes at least one of a photon shielding material and a neutron shielding material. As a preferred embodiment, the material of the radiation shielding body 34 includes a photon shielding material lead (Pb) and a neutron shielding material polyethylene (PE). The beam outlet 37 is disposed at the rear of the beam channel 35. The epithermal neutron beam exiting the beam outlet 37 irradiates the irradiated body M, and is slowly converted into thermal neutrons after passing through the shallow normal tissue and reaching the tumor cells of the irradiated body M.

The beam detection device 10 is disposed at the beam outlet 37 of the irradiation system 1. The irradiation system 1 generates a radioactive beam and emits the beam from the beam outlet 37. The beam detection device 10 detects parameters of the beam.

As shown in FIGS. 3 and 4 , the adjustment assembly 100 includes a first adjustment unit 110, a second adjustment unit 120, and a support unit 130. The support unit 130 is fixed at the beam outlet 37. Furthermore, the support unit 130 is fixedly connected to the beam shaping body 30 by fasteners such as screws. At least one of the first adjustment unit 110 and the second adjustment unit 120 is connected to the support unit 130. The first adjustment unit 110 is used to adjust the position of the detection element 300 along the first direction A, and the second adjustment unit 120 is used to adjust the position of the detection element 300 along the second direction B, so that the detection element 300 is finally located at the target position, and the first direction A and the second direction B are different. Furthermore, the first direction A and the second direction B are perpendicular. Furthermore, the first direction A and the second direction B are in a plane parallel to the plane where the beam outlet 37 is located, the first direction A is a horizontal direction parallel to the plane where the beam outlet 37 is located, and the second direction B is a vertical direction parallel to the plane where the beam outlet 37 is located. In this embodiment, the first adjustment unit 110 drives the mounting assembly 200 mounted with the detection element 300 to move relative to the support unit 130 along the first direction A, and the second adjustment unit 120 drives the mounting assembly 200 mounted with the detection element 300 to move relative to the support unit 130 along the second direction B.

The support unit 130 includes a guide groove 131 and a support member 132. The support unit 130 is directly or indirectly connected to the beam shaping body 30. Specifically, the support unit 130 is connected to the beam shaping body 30 through the support member 132. The support unit 130 is formed with a guide groove 131 extending substantially along the first direction A, and the guide groove 131 is formed by an inward depression of one side of the support unit 130. The first adjustment unit 110 is connected to the guide groove 131, and part of the structure moves along the first direction A under the guidance of the guide groove 131. In other embodiments, the guide groove 131 can also be replaced by a protruding track or other structure that can limit the movement trajectory of the first adjustment unit 110, which is not limited here.

The first adjustment unit 110 includes a first moving block 111 connected to the guide groove 131 and a first driving member 112 driving the first moving block 111 to move along the track defined by the guide groove 131. Specifically, the first moving block 111 moves along a first direction A relative to the guide groove 131 under the driving action of the first driving member 112. The first driving member 112 can provide power for the movement of the first moving block 111, and can also transmit power to drive the first moving block 111. Further, the first driving member 112 can move along the first direction A. One end of the first driving member 112 is connected to the first moving block 111, and the other end provides power for movement.

The first moving block 111 includes a moving portion 1111 and a positioning portion 1112. The moving portion 1111 moves in the guide groove 131, and the shape of the moving portion 1111 matches the shape of the guide groove 131. One end of the first driving member 112 is connected to the first moving block 111 through the positioning portion 1112, and one end of the positioning portion 1112 is protruded above the opening edge of the guide groove 131 to further limit the movement path of the positioning portion 1112, the first driving member 112 and the first moving block 111. The connection between the positioning portion 1112 and the first driving member 112 can be set outside the guide groove 131, so that the positioning portion 1112 can follow the first moving block 111 to move along the opening edge of the guide groove 131.

Furthermore, the support unit 130 is also provided with a first positioning member 133 for guiding and limiting. The first driving member 112 is movably connected to the first positioning member 133 so that the first driving member 112 moves relative to the first positioning member 133. The first positioning member 133 can assist the guide groove 131 to limit the movement path of the first driving member 112. As a preferred embodiment, a through hole is provided on the first positioning member 133, and the surface of the through hole can be provided with an internal thread. The outer surface of the first driving member 112 can be provided with an external thread corresponding to the internal thread on the surface of the through hole. Through the thread connection, the first driving member 112 is guided and limited. In other embodiments, the first driving member 112 and the first positioning member 133 can also be slidably connected.

The first moving block 111 is directly or indirectly connected to the mounting assembly 200. In this embodiment, the first moving block 111 is connected to the mounting assembly 200 through the second adjusting unit 120. Driven by the movement of the first moving block 111, the second adjusting unit 120 and the mounting assembly 200 move in the first direction A as a whole.

The second adjustment unit 120 includes a second moving block 121 and a second driving member 122. At least one of the second moving block 121 or the second driving member 122 can move along the second direction B relative to the first moving block 111. The second driving member 122 drives the second moving block 121 to move along the second direction B relative to the support unit 130. The second driving member 122 can provide power for the movement of the second moving block 121, and can also transmit the power to drive the second moving block 121. One end of the second driving member 122 is connected to the second moving block 121, and the other end provides power for movement. The middle part of the second driving member 122 is connected to the first moving block 111. Further, the second driving member 122 can move along the second direction B.

Furthermore, the first moving block 111 includes a second positioning member 1113 for guiding and limiting. The second driving member 122 is movably connected to the second positioning member 1113 so that the second driving member 122 moves relative to the second positioning member 1113. The second positioning member 1113 can provide a movement path for the first driving member 112 and limit the movement state of the first driving member 112. The second positioning member 1113 can be a through hole directly opened on the first moving block 111, and the second driving member 122 passes through the through hole to be connected to the first moving block 111; in another embodiment, the second positioning member 1113 can also be a guide tube or other guide member embedded in the first moving block 111, and the second driving member 122 is connected to the first moving block 111 through the guide tube or other guide member. As a preferred implementation, the inner surface of the second positioning member 1113 can be provided with an internal thread, and the outer surface of the second driving member 122 can be provided with an external thread corresponding to the internal thread of the second positioning member 1113. Through the threaded connection, the second driving member 122 can be provided with a movement path and a limit.

Furthermore, the second adjustment unit 120 also includes a third guide rod 123, which is symmetrically arranged on both sides of the second drive member 122. One end of the third guide rod 123 is movably connected to the first moving block 111, and the other end is connected to the second moving block 121. The third guide rod 123 moves relative to the first moving block 111 following the drive of the second drive member 122. Furthermore, the third guide rod 123 is movably connected to the first moving block 111 through a third positioning member 1114 arranged on the first moving block 111. The third positioning member 1114 plays a guiding role in assisting the second positioning member 1113. In this embodiment, the third positioning member 1114 is a through hole arranged on the first moving block 111.

The mounting assembly 200 is detachably connected to the adjusting assembly 100. In this embodiment, the mounting assembly 200 is detachably connected to the second adjusting unit 120, and specifically, the mounting assembly 200 is detachably connected to the second moving block 121. In the actual detection process, in order to ensure that the irradiation system 1 poses minimal harm to the operator of the beam detection device 10, it is necessary to first assemble the mounting assembly 200 and the detection element 300 in a room far away from the beam outlet 37 (generally a preparation room), and then directly install the mounting assembly 200 to the adjustment assembly 100, and adjust the positions of the mounting assembly 200 and the detection element 300 as a whole in the irradiation room where the beam outlet 37 is located. The adjustment speed is fast and the time is short, which reduces the exposure dose of the operator at the beam outlet and can minimize the radiation impact on the operator.

The mounting assembly 200 includes a bracket 210 and a mounting seat 220 disposed on the bracket 210. A first connector 211 is disposed on the bracket 210, and the second adjustment unit 120 further includes a second connector 124 for connecting the first connector 211, and the first connector 211 and the second connector 124 are detachably connected. As an optional embodiment, the first connector 211 and the second connector 124 can be connected by snapping. The second moving block 121 is connected or formed with the second connector 124, and the mounting assembly 200 is detachably connected to the second moving block 121 through the second connector 124. Furthermore, the second connector 124 is symmetrically disposed at both ends of the second moving block 121, and the first connector 211 is connected to the corresponding position of the second connector 124.

The second adjustment unit 120 further includes a locking member 125, and the locking member 125 locks the mounting assembly 200 and the adjustment assembly 100. The locking member 125 locks the position of the mounting assembly 200 relative to the second adjustment assembly 100. Further, the locking member 125 is connected to the second moving block 121 or the second connecting member 124, and the locking member 125 locks the mounting assembly 200 by locking the position of the first connecting member 211 relative to the second moving block 121 or the second connecting member 124. As a preferred implementation, the second connecting member 124 is provided with threads on its surface, the locking member 125 is a threaded nut, and the inner threads of the locking member 125 match the threads on the surface of the second connecting member 124.

The support 210 is at least partially arranged around the beam outlet 37. In the preparation room, the detection element 300 can be installed in the middle part of the support 210. The middle part can be defined as the center of the support 210 (which can be the center of mass) and the surrounding area that occupies 10%-40% of the volume of the area surrounded by the support 210. The support 210 itself can be symmetrical in shape so that the operator can easily confirm the center of the support 210, and the detection element 300 is installed at a position close to the center. When the mounting assembly 200 is installed to the adjustment assembly 100, the detection element 300 is already roughly located at the target position that can be detected (which can be the center of the beam outlet 37), which can effectively reduce the number of times and time for adjusting the position of the detection element 300.

The bracket 210 at least includes a first frame 212 connected to one of the first adjustment unit 110 and the second adjustment unit 120 and a second frame 213 provided with a mounting seat 220. Furthermore, a first connecting member 211 is provided on the first frame 212. The first frame 212 can be the same as or different from the second frame 213. In this embodiment, the first frame 212 and the second frame 213 are symmetrically arranged, and the first frame 212 and the second frame 213 are both provided with a mounting seat 220, and two first connecting members 211 are provided and are respectively arranged on both sides of the first frame 212.

The mounting seat 220 is used to mount the detection element 300. The mounting seat 220 directly or indirectly mounts the detection element 300 in the middle part of the bracket 210. The mounting seat 220 includes at least one mounting portion 221, and the mounting portion 221 is used to mount the detection element 300. Furthermore, in this embodiment, the mounting portion 221 includes a plurality of mounting holes provided on the mounting seat 220. Different mounting holes may have different sizes and shapes, and are used to connect different mounting needles 222 or detection elements 300. The mounting needle 222 realizes an indirect connection between the detection element 300 and the mounting seat 220. The detection element 300 is a Bonnet ball or a foil (not shown in the figure) as shown in Figures 3 and 4, and needs to be connected to the mounting seat 220 through the mounting needle 222. In other embodiments, the mounting seat 220 may be detachably connected to the bracket 210 , and the mounting seat 220 may include a plurality of seats of different shapes to adapt to different detection elements 300 .

FIG6 shows another embodiment of the beam detection device 10 of the present application. The same components as the previous embodiment are labeled with the same reference numerals and are not described in detail here. The detection element 300' is an ionization chamber and can be directly connected to the corresponding mounting portion 221' on the bracket 210.

In other embodiments, the adjustment assembly 100 may include only one of the first adjustment unit 110 or the second adjustment unit 120. In this case, the adjustment assembly 100 can only provide position adjustment in one direction, and the adjustment of the detection element 300 in other directions can be completed when it is mounted on the mounting assembly 200. The mounting assembly 200 may include a preliminary calibration structure, and the target position is corresponded to the calibration structure by calculation. When the mounting assembly 200 is connected to the adjustment assembly 100, it is only necessary to adjust the relative position between the calibration structure or the mounting assembly 200 and the target position.

The beam detection device of the above-mentioned embodiment can adjust the position of the detection element in multiple directions with fast adjustment speed, less adjustment times and short time; the adjustment component includes multiple positioning and guiding structures, which improves the accuracy and stability of the adjustment position of the adjustment element; by providing a detachable mounting component, the separation of the pre-adjustment of the mounting component and the secondary adjustment of the adjustment component can be achieved, which effectively reduces the number and time of position adjustment of the detection element, reduces the exposure dose of the operator at the beam outlet, and minimizes the radiation impact on the operator.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present application, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the invention patent. It should be pointed out that for those with ordinary knowledge in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be based on the scope of the attached application patent.

1: irradiation system 10: beam detection device 20: neutron generation device 21: accelerator 22: beam transmission device 30: beam shaping body 31: reflector 32: retarder 33: thermal neutron absorber 34: radiation shielding body 35: beam channel 36: collimator 37: beam exit 100: adjustment assembly 110: first adjustment unit 120: second adjustment unit 111: first moving block 112: first driving member 1111: moving part 1112: positioning part 1113: second positioning member 1114: third positioning member 121: second moving block 122: second driving member 123: Third guide rod 124: Second connecting member 125: Locking member 130: Support unit 131: Guide groove 132: Support member 133: First positioning member 200: Mounting assembly 210: Bracket 220: Mounting seat 211: First connecting member 212: First frame 213: Second frame 221,221': Mounting part 222: Mounting needle 300,300': Detection element A: First direction A-A: Plane B: Second direction M: Irradiated body N: Neutron beam P: Charged particle beam T: Target

FIG1 is a schematic diagram of a detection device installed at a beam outlet according to an embodiment;

FIG2 is a schematic diagram of an irradiation system according to an embodiment;

FIG3 is a schematic diagram of the structure of a detection device according to an embodiment;

FIG4 is a schematic diagram of FIG3 from another perspective;

Fig. 5 is a schematic cross-sectional view of the A-A plane of Fig. 4;

FIG. 6 is a schematic diagram of the installation of a detection element according to another embodiment.

10: Beam detection device

30: Beam shaping body

37: Beam exit

Claims (11)

A beam detection device is characterized in that it includes: an adjustment assembly, including a support unit fixed at a beam exit, and also includes a first adjustment unit and a second adjustment unit, at least one of the first adjustment unit and the second adjustment unit is connected to the support unit; a mounting assembly, detachably connected to the adjustment assembly; a detection element, fixed on the mounting assembly; the first adjustment unit and the second adjustment unit are used to adjust the position of the detection element along different directions. The beam detection device as described in claim 1 is characterized in that the first adjustment unit is connected to the mounting assembly, and the first adjustment unit is used to drive the mounting assembly to move along a first direction relative to the supporting unit. The beam detection device as described in claim 2 is characterized in that the support unit is provided with a guide groove extending along a first direction, the first adjustment unit includes a first moving block cooperating with the guide groove and a first driving member driving the first moving block to move along the guide groove, and the first moving block is connected to the mounting assembly. The beam detection device as described in claim 3 is characterized in that the second adjustment unit is connected to the first moving block. The beam detection device as described in claim 1 is characterized in that the mounting assembly is detachably connected to the second adjustment unit, and the second adjustment unit is connected to the first adjustment unit. The beam detection device as described in claim 5 is characterized in that the second adjustment unit includes a second moving block and a second driving member for driving the second moving block to move along a second direction relative to the supporting unit, and the mounting assembly is detachably connected to the second moving block. The beam detection device as described in claim 6 is characterized in that the second moving block is connected to the first adjusting unit. The beam detection device as described in claim 1 is characterized in that the mounting assembly includes a bracket connected to the adjustment assembly and a mounting seat arranged on the bracket, the bracket is at least partially arranged around the beam outlet, and the mounting seat is used to mount the detection element. The beam detection device as described in claim 8 is characterized in that the bracket is provided with a connecting piece, and the connecting piece is detachably connected to the adjustment assembly. The beam detection device as described in claim 8 is characterized in that the mounting base includes at least one mounting portion, and the at least one mounting portion is used to mount the detection element. The beam detection device as described in claim 1 is characterized in that the detection device also includes a locking piece, which is used to lock the mounting assembly and the adjustment assembly.