Beam measurement tool and beam measurement assembly

Abstract

The utility model belongs to the technical field of high-end medical instruments, and discloses a beam measurement tool and a beam measurement assembly. The beam measurement tool comprises a scanning magnet support and a first support assembly. The scanning magnet support is configured to be fixedly installed on the accelerator, and one of the scanning magnet and the Faraday cup can be selectively installed on the scanning magnet support; the first support assembly comprises two oppositely arranged first supports, each first support comprises a connecting part and an ionization chamber mounting part connected with one end of the connecting part, the other end of the connecting part can be fixedly connected to the scanning magnet support, and an ionization chamber can be mounted on the ionization chamber mounting part. The beam measurement tool provided by the utility model can be installed at the front end of the medical particle accelerator and rotates along with the medical particle accelerator so as to accurately measure the beam emitted by the medical particle accelerator.

Description

Technical Field

[0001] The utility model relates to the technical field of high-end medical equipment, in particular to a beam measurement tool and a beam measurement component. Background Art

[0002] A medical particle accelerator is a biomedical device used for radiotherapy of tumors. The beam quality of a medical particle accelerator directly impacts the therapeutic efficacy of a patient's tumor. A beam is a stream of charged particles, formed by the directional motion of a large number of charged particles under the influence of an electromagnetic field. To ensure minimal interference with the beam's magnitude on its way to the patient, beam calibration and measurement are generally required to achieve optimal therapeutic results.

[0003] In existing technology, when measuring the beam emitted by a medical particle accelerator, the measurement tool is generally fixed on a platform independent of the particle accelerator. This makes it impossible for the measurement tool to rotate with the particle accelerator to measure the beam, which is not conducive to measurement. Therefore, it is necessary to improve the existing measurement tools. Utility Model Content

[0004] The purpose of the utility model is to provide a beam measurement tool and a beam measurement component, which can be installed at the front end of a particle accelerator and rotate with the particle accelerator to perform omnidirectional measurement of the beam emitted by the particle accelerator.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Beam measurement tooling, including:

[0007] A scanning magnet bracket, configured to be fixedly mounted on the particle accelerator, wherein the scanning magnet bracket can selectively be mounted with one of a scanning magnet and a Faraday cup, and the scanning magnet bracket is arranged to be located below the path along which the beam continues to travel after leaving the particle accelerator;

[0008] a first bracket assembly, the first bracket assembly being fixed to the scanning magnet bracket and comprising two first brackets arranged opposite to each other, the first bracket comprising a connecting portion and an ionization chamber mounting portion connected to one end of the connecting portion, the other end of the connecting portion being capable of being fixedly connected to the scanning magnet bracket, and the ionization chamber mounting portion being capable of mounting an ionization chamber; the first bracket assembly at least partially extending upwardly beyond the scanning magnet bracket in a height direction;

[0009] The second bracket assembly is detachably mounted on the ionization chamber mounting portion, and the second bracket assembly is used to mount a detector.

[0010] Optionally, the beam measurement tool further includes a connecting block and a connecting piece, the connecting block is arranged in a one-to-one correspondence with the first bracket, and the connecting piece passes through and fixes the scanning magnet bracket, the connecting block and the first bracket corresponding to the connecting block in sequence.

[0011] Optionally, the first bracket assembly further includes a wire harness fixing frame, the wire harness fixing frame is provided on the inner side of at least one of the first brackets, and the wire harness fixing frame is provided with a plurality of wire threading holes, and one end of each of the wire threading holes has an opening.

[0012] Optionally, the wiring harness fixing frame includes:

[0013] a fixing plate, detachably mounted on the inner side of the first bracket;

[0014] A lower plate is fixedly arranged at the lower end of the fixed plate, and a plurality of threading holes are opened on the lower plate along the extension direction of the lower plate;

[0015] The upper plate is fixedly arranged on the upper end of the fixed plate and is arranged opposite to the lower plate. Along the extension direction of the upper plate, a plurality of threading holes are opened on the upper plate, and the threading holes on the lower plate are arranged in a one-to-one correspondence with the threading holes on the upper plate.

[0016] Optionally, a reinforcing transverse plate is connected between the two first brackets.

[0017] Optionally, a sub-mounting frame is detachably mounted on the ionization chamber mounting portion, and the sub-mounting frame is used to mount the ionization chamber.

[0018] Optionally, the ionization chamber mounting portion is provided with weight-reducing holes and / or weight-reducing grooves.

[0019] Optionally, the second bracket assembly includes a detector mounting bracket and two oppositely arranged second brackets, one end of the second bracket is detachably mounted on the ionization chamber mounting portion, and the detector mounting bracket is detachably connected to the two second brackets.

[0020] Optionally, the detector mounting bracket includes:

[0021] The detector mounting frame plate is detachably connected to the two second brackets;

[0022] Two vertical plates are arranged on the detector mounting frame plate body with relative spacing, and the vertical plates are provided with card slots for card connection with the detector.

[0023] The beam measurement assembly includes the above-mentioned beam measurement fixture as well as a scanning magnet, a Faraday cup, an ionization chamber and a detector.

[0024] Beneficial effects of the utility model:

[0025] The beam current measurement tooling proposed in the utility model can rotate along with the particle accelerator to accurately measure the beam current emitted by the particle accelerator, thereby ensuring the accuracy of the measurement result.

[0026] When the beam current measurement tool is in use, the scanning magnet bracket can be fixedly installed on the particle accelerator, and then the connecting part of the first bracket assembly is fixedly connected to the scanning magnet bracket, the ionization chamber used to measure the beam current is installed on the first bracket assembly, and the scanning magnet is installed on the scanning magnet bracket. At this time, the beam current is measured by the ionization chamber. When the particle accelerator rotates, the particle accelerator can drive the scanning magnet bracket to rotate, and the scanning magnet bracket drives the first bracket assembly to rotate, thereby realizing accurate measurement of the beam current by the ionization chamber.

[0027] Alternatively, the scanning magnet is not installed on the scanning magnet bracket, but a Faraday cup is installed on the scanning magnet bracket. In this case, there is no need to install an ionization chamber on the first bracket assembly. The Faraday cup rotates with the scanning magnet bracket and accurately measures the beam current.

[0028] When the detector is needed, the second bracket assembly is mounted on the ionization chamber mounting portion, and then the detector is mounted on the second bracket assembly. The ionization chamber is mounted on the ionization chamber mounting portion. The scanning magnet, ionization chamber, and detector work together to measure the beam current. Alternatively, the detector can be used alone to measure the beam current.

[0029] The beam current measurement assembly proposed in the present invention includes the above-mentioned beam current measurement tool. The beam current measurement assembly can rotate with the particle accelerator to accurately measure the beam current emitted by the particle accelerator, thereby ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0031] Figure 1 This is a structural diagram of the beam current measurement tool provided by an embodiment of the present utility model when it is in the first working mode;

[0032] Figure 2 yes Figure 1 The schematic diagram after the scanning magnet bracket and scanning magnet are hidden in the middle;

[0033] Figure 3 yes Figure 2 The schematic diagram after the connecting block and a first bracket are hidden;

[0034] Figure 4 This is a schematic structural diagram of a first bracket provided by an embodiment of the present utility model;

[0035] Figure 5 This is a schematic structural diagram of a wire harness fixing frame provided by an embodiment of the present utility model;

[0036] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0037] Figure 7 This is a structural diagram of the beam current measurement tool provided by an embodiment of the present utility model when no measurement tool is installed;

[0038] Figure 8 It is a structural schematic diagram of the second bracket assembly provided by an embodiment of the present utility model;

[0039] Figure 9 This is a schematic diagram of the beam current measurement tool provided by an embodiment of the present utility model in the second working mode;

[0040] Figure 10 This is a schematic diagram of the beam current measurement tool provided by an embodiment of the present utility model in the third working mode;

[0041] Figure 11 This is a schematic diagram of the beam current measurement tool provided by an embodiment of the present utility model in a fourth working mode;

[0042] Figure 12 This is a schematic diagram of the beam measurement tool provided by an embodiment of the present utility model when it is in the fifth working mode.

[0043] In the picture:

[0044] 10. Scanning magnet; 20. Faraday cup; 30. Ionization chamber; 40. Detector;

[0045] 201, Faraday cup support; 2011, flat plate; 2012, bottom plate;

[0046] 1. Scanning magnet bracket;

[0047] 2. First bracket assembly; 21. First bracket; 211. Connecting portion; 212. Ionization chamber mounting portion; 2121. Weight reduction hole; 22. Wire harness fixing bracket; 221. Threading hole; 222. Lower plate; 223. Fixing plate; 224. Upper plate; 23. Reinforced horizontal plate; 24. Sub-mounting bracket;

[0048] 3. Second bracket assembly; 31. Second bracket; 32. Detector mounting bracket; 321. Detector mounting bracket plate; 322. Vertical plate; 3221. Card slot; 33. Reinforcement beam;

[0049] 4. Connect the blocks. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0051] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0052] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0054] See also Figure 1-Figure 3 This embodiment provides a beam measurement tool that can be installed at the front end of a medical particle accelerator and rotate with the medical particle accelerator to accurately measure the beam emitted by the particle accelerator. The particle accelerator can be a proton accelerator or a heavy ion accelerator, and the beam can be a proton or heavy ion beam.

[0055] Specifically, in this embodiment, the beam measurement tooling includes a scanning magnet bracket 1 , a first bracket assembly 2 and a second bracket assembly 3 .

[0056] See also Figure 1 and Figure 9 The scanning magnet bracket 1 is used to be fixedly mounted on the particle accelerator. One of the scanning magnet 10 and the Faraday cup 20 can be selectively mounted on the scanning magnet bracket 1. The scanning magnet bracket 1 is arranged to be located below the path where the beam continues to move after leaving the particle accelerator.

[0057] Specifically, the scanning magnet bracket 1 can directly adopt the scanning magnet bracket of the accelerator. In this configuration, there is no need to additionally design and produce the scanning magnet bracket 1, thereby saving costs. That is, in this embodiment, the scanning magnet bracket 1 itself is part of the accelerator.

[0058] See also Figure 2-Figure 4 The first bracket assembly 2 is fixed to the scanning magnet bracket 1 and includes two opposing first brackets 21. The first bracket 21 includes a connecting portion 211 and an ionization chamber mounting portion 212 connected to one end of the connecting portion 211. The other end of the connecting portion 211 can be fixedly connected to the scanning magnet bracket 1. The ionization chamber mounting portion 212 can be mounted on the ionization chamber 30. The first bracket assembly 2 at least partially extends upwardly beyond the scanning magnet bracket 1 in the height direction.

[0059] The second bracket assembly 3 is detachably mounted on the ionization chamber mounting portion 212 , and the second bracket assembly 3 is used to mount the detector 40 .

[0060] The arrangement of the first bracket assembly 2 and the second bracket assembly 3 enables the beam measurement tool to have more working modes.

[0061] In the beam current measurement tooling provided in this embodiment, the scanning magnet bracket 1 can be fixedly mounted on the accelerator, and then the connecting portion 211 of the first bracket assembly 2 is fixedly connected to the scanning magnet bracket 1. The ionization chamber 30 for measuring the beam current is mounted on the first bracket assembly 2, and the scanning magnet 10 is mounted on the scanning magnet bracket 1. At this time, the beam current is measured by the ionization chamber 30. When the accelerator rotates, the accelerator can drive the scanning magnet bracket 1 to rotate, and the scanning magnet bracket 1 drives the first bracket assembly 2 to rotate, thereby achieving accurate measurement of the beam current by the ionization chamber 30.

[0062] Alternatively, the scanning magnet 10 is not installed on the scanning magnet support 1, and the Faraday cup 20 is installed on the scanning magnet support 1. In this case, there is no need to install the ionization chamber 30 on the first support assembly 2. The Faraday cup 20 rotates with the scanning magnet support 1 and accurately measures the beam.

[0063] When the detector 40 is needed, the second bracket assembly 3 is mounted on the ionization chamber mounting portion 212, and then the detector 40 is mounted on the second bracket assembly 3. The ionization chamber 30 is mounted on the ionization chamber mounting portion 212. The scanning magnet 10, ionization chamber 30, and detector 40 work together to measure the beam current. Alternatively, the detector 40 can be used alone to measure the beam current.

[0064] That is, the beam measurement tool provided in this embodiment can rotate with the accelerator to accurately measure the beam emitted by the accelerator, thereby ensuring the accuracy of the measurement results.

[0065] Specifically, see Figure 2 and Figure 3 A reinforcing transverse plate 23 is connected between the two first brackets 21. The arrangement of the reinforcing transverse plate 23 can ensure the overall strength of the first bracket assembly 2.

[0066] Furthermore, there are two reinforcing transverse plates 23 , and the two reinforcing transverse plates 23 are respectively located at two ends of the first bracket 21 .

[0067] Furthermore, a sub-mounting frame 24 is detachably mounted on the ionization chamber mounting portion 212 , and the sub-mounting frame 24 is used to mount the ionization chamber 30 .

[0068] Optionally, the sub-mounting frame 24 is detachably mounted on the ionization chamber mounting portion 212 by bolts.

[0069] Further, see Figure 4 In order to achieve a lightweight design of the product, the ionization chamber mounting portion 212 is provided with weight-reducing holes 2121 and / or weight-reducing grooves.

[0070] Specifically, see Figure 1 and Figure 2 The beam current measurement tool also includes a connecting block 4, which is provided in a one-to-one correspondence with the first bracket 21. The beam current measurement tool also has a connecting member that sequentially passes through and fixes the scanning magnet bracket 1, the connecting block 4, and the first bracket 21 corresponding to the connecting block 4. Specifically, the connecting member can be a bolt and nut assembly.

[0071] That is, the connecting member passes through the scanning magnet bracket 1, the connecting block 4 and the first bracket 21 corresponding to the connecting block 4 in sequence, and then fixes the scanning magnet bracket 1, the connecting block 4 and the first bracket 21 corresponding to the connecting block 4 together.

[0072] The provision of the connecting block 4 can increase the connection strength between the first bracket 21 and the scanning magnet bracket 1 .

[0073] See also Figure 3 、 Figure 5 and Figure 6The first bracket assembly 2 also includes a wire harness fixing frame 22. A wire harness fixing frame 22 is provided on the inner side of at least one first bracket 21. The wire harness fixing frame 22 is provided with a plurality of threading holes 221. One end of each threading hole 221 has an opening.

[0074] Since multiple wire harnesses are connected to the ionization chamber 30 when the ionization chamber 30 is mounted on the first bracket assembly 2, in order to guide and fix the multiple wire harnesses of the ionization chamber 30 and avoid the wire harnesses being messy, a plurality of wire threading holes 221 are provided on the wire harness fixing frame 22. One end of each wire threading hole 221 has an opening, which facilitates squeezing the side of a wire harness into the wire threading hole 221 from the opening of the wire threading hole 221.

[0075] Furthermore, in this embodiment, a wire harness fixing frame 22 is provided on the inner side of each first bracket 21 .

[0076] Specifically, see Figure 6 In this embodiment, the wire harness fixing frame 22 includes a fixing plate 223 , a lower plate 222 and an upper plate 224 .

[0077] The fixing plate 223 is detachably mounted on the inner side of the first bracket 21 .

[0078] The lower plate 222 is fixedly disposed on the lower end of the fixing plate 223 . A plurality of threading holes 221 are formed on the lower plate 222 along an extending direction of the lower plate 222 .

[0079] The upper plate 224 is fixedly arranged on the upper end of the fixed plate 223 and is arranged opposite to the lower plate 222. A plurality of threading holes 221 are opened on the upper plate 224 along the extension direction of the upper plate 224. The threading holes 221 on the lower plate 222 are arranged one-to-one with the threading holes 221 on the upper plate 224.

[0080] The threading holes 221 on the lower plate 222 are arranged in a one-to-one correspondence with the threading holes 221 on the upper plate 224. A wire harness needs to pass through the two threading holes 221 correspondingly arranged above and below, which fully fixes and organizes the wire harness and avoids the wire harness being messy.

[0081] Specifically, see Figure 7 and Figure 8 The second bracket assembly 3 includes a detector mounting bracket 32 and two oppositely arranged second brackets 31. One end of the second bracket 31 can be detachably mounted on the ionization chamber mounting portion 212. The detector mounting bracket 32 and the two second brackets 31 can be detachably connected.

[0082] Furthermore, a reinforcing crossbeam 33 is connected between the two second brackets 31 to ensure the structural strength of the second bracket assembly 3 .

[0083] Furthermore, the detector mounting frame 32 includes a detector mounting frame plate body 321 and two vertical plates 322 .

[0084] The detector mounting frame plate 321 and the two second brackets 31 are both detachably connected.

[0085] The two vertical plates 322 are arranged on the detector mounting frame plate 321 at a relative interval. The vertical plates 322 are provided with a card slot 3221 for engaging with the detector 40 .

[0086] The provision of the card slot 3221 can achieve accurate positioning and installation of the detector 40, thereby ensuring the accuracy of the detection result.

[0087] Specifically, the scanning magnet bracket 1 is provided with a mounting hole for mounting the scanning magnet 10 .

[0088] See also Figure 9 When the Faraday cup 20 needs to be installed, first install the Faraday cup holder 201 for mounting the Faraday cup 20 on the scanning magnet holder 1. Specifically, the Faraday cup holder 201 includes a base plate 2012 and a flat plate 2011 vertically disposed on the base plate 2012. The base plate 2012 is bolted to the mounting holes of the scanning magnet holder 1, and the Faraday cup 20 is then mounted on the flat plate 2011.

[0089] Specifically, the beam measurement tool provided in this embodiment has five working modes.

[0090] For example, see Figure 1 In the first operating mode, scanning magnet 10 is mounted on scanning magnet support 1, ionization chamber 30 is mounted on first support assembly 2, and detector 40 is mounted on second support assembly 3 to measure beam current. This allows for measurement of the beam spot position and size, beam current, and dose.

[0091] For example, see Figure 9 In the second working mode, the beam current can be measured by installing the Faraday cup 20 on the scanning magnet support 1. At this time, the first support assembly 2 can be installed or not. At this time, the Faraday cup 20 can measure the beam current.

[0092] For example, see Figure 10 In the third operating mode, scanning magnet 10 is installed on scanning magnet support 1, and ionization chamber 30 is installed on first support assembly 2 to measure beam current. Second support assembly 3 can be installed or not. Specifically, scanning magnet 10 and ionization chamber 30 work together to perform dose function testing, such as determining the absolute dose of the beam current.

[0093] For example, see Figure 11In the fourth operating mode, scanning magnet 10 is mounted on scanning magnet support 1, ionization chamber 30 is not mounted on first support assembly 2, and detector 40 is mounted on second support assembly 3 to measure the beam current. In this mode, the beam deflection position can be measured at different accelerator angles.

[0094] For example, see Figure 12 In the fifth operating mode, neither the scanning magnet 10 nor the Faraday cup 20 is mounted on the scanning magnet support 1, and the ionization chamber 30 is not mounted on the first support assembly 2. The detector 40 is mounted on the second support assembly 3 to measure the beam current. In this mode, the detector 40 can measure the beam spot position and size at different angles.

[0095] The Faraday cup 20 , the ionization chamber 30 and the detector 40 are all measurement tools.

[0096] Optionally, in this embodiment, the scanning magnet bracket 1, the first bracket assembly 2 and the second bracket assembly 3 are made of alloy materials, such as aluminum alloy or stainless steel, to ensure that the beam measurement tooling can also be used in the presence of a magnetic field.

[0097] This embodiment further provides a beam measurement assembly, which includes the above-mentioned beam measurement tooling as well as a scanning magnet 10 , a Faraday cup 20 , an ionization chamber 30 and a detector 40 .

[0098] Specifically, in this embodiment, the beam measurement component also includes the five working modes mentioned above; when using the beam measurement component, the tester can select one of the first working mode, the second working mode, the third working mode, the fourth working mode and the fifth working mode to use the beam measurement component as needed.

[0099] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Beam measurement tooling, characterized in that: include: A scanning magnet support (1) is used for fixedly mounting on a particle accelerator, wherein one of a scanning magnet (10) and a Faraday cup (20) can be selectively mounted on the scanning magnet support (1), and the scanning magnet support (1) is arranged to be located below a path along which a beam continues to move after leaving the particle accelerator; a first bracket assembly (2), the first bracket assembly (2) being fixed to the scanning magnet bracket (1), comprising two first brackets (21) arranged opposite to each other, the first bracket (21) comprising a connecting portion (211) and an ionization chamber mounting portion (212) connected to one end of the connecting portion (211), the other end of the connecting portion (211) being capable of being fixedly connected to the scanning magnet bracket (1), and an ionization chamber (30) being capable of being mounted on the ionization chamber mounting portion (212); the first bracket assembly (2) at least partially extending upwardly beyond the scanning magnet bracket (1) in a height direction; A second bracket assembly (3), wherein the second bracket assembly (3) is detachably mounted on the ionization chamber mounting portion (212), and the second bracket assembly (3) is used for mounting a detector (40).

2. The beam current measurement tool according to claim 1, characterized in that: The beam current measurement tool further comprises a connecting block (4) and a connecting piece, wherein the connecting block (4) is arranged in a one-to-one correspondence with the first bracket (21), and the connecting piece sequentially passes through and fixes the scanning magnet bracket (1), the connecting block (4), and the first bracket (21) corresponding to the connecting block (4).

3. The beam current measurement tool according to claim 1, characterized in that: The first bracket assembly (2) further comprises a wire harness fixing frame (22), the wire harness fixing frame (22) being provided on the inner side of at least one of the first brackets (21), and a plurality of wire threading holes (221) being provided on the wire harness fixing frame (22), and one end of each wire threading hole (221) having an opening.

4. The beam current measurement tool according to claim 3, characterized in that: The wiring harness fixing frame (22) comprises: a fixing plate (223) detachably mounted on the inner side of the first bracket (21); A lower plate (222) is fixedly arranged at the lower end of the fixed plate (223), and a plurality of threading holes (221) are opened on the lower plate (222) along the extending direction of the lower plate (222); The upper plate (224) is fixedly arranged on the upper end of the fixed plate (223) and is arranged opposite to the lower plate (222). Along the extension direction of the upper plate (224), a plurality of threading holes (221) are opened on the upper plate (224), and the threading holes (221) on the lower plate (222) are arranged in a one-to-one correspondence with the threading holes (221) on the upper plate (224).

5. The beam current measurement tool according to claim 1, characterized in that: A reinforcing transverse plate (23) is connected between the two first brackets (21).

6. The beam current measurement tool according to claim 1, characterized in that: A sub-mounting frame (24) is detachably mounted on the ionization chamber mounting portion (212), and the sub-mounting frame (24) is used to mount the ionization chamber (30).

7. The beam current measurement tool according to claim 1, characterized in that: The ionization chamber mounting portion (212) is provided with a weight-reducing hole (2121) and / or a weight-reducing groove.

8. The beam measurement tool according to any one of claims 1 to 7, characterized in that: The second bracket assembly (3) comprises a detector mounting bracket (32) and two second brackets (31) arranged opposite to each other, one end of the second bracket (31) is detachably mounted on the ionization chamber mounting portion (212), and the detector mounting bracket (32) and the two second brackets (31) are detachably connected.

9. The beam current measurement tool according to claim 8, characterized in that: The detector mounting frame (32) comprises: A detector mounting frame plate (321) is detachably connected to the two second brackets (31); Two vertical plates (322) are arranged at intervals on the detector mounting frame plate (321), and the vertical plates (322) are provided with a card slot (3221) for card engagement with the detector (40).

10. Beam current measurement assembly, characterized in that, The invention comprises the beam measurement tooling according to any one of claims 1 to 9, as well as a scanning magnet (10), a Faraday cup (20), an ionization chamber (30) and a detector (40).

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