A detector evaluation device and method

Abstract

The present application provides a detector evaluation device and method, relating to the technical field of radiation detector evaluation, including: a shielding housing with an inner cavity, a base platform located in the inner cavity, and a radiation source. A evaluation station for placing a detector to be tested is arranged on the base platform, and the radiation source corresponds to the evaluation station. The detector to be tested is electrically connected to the pads of the base platform. An electrometer and an energy spectrum collector that are respectively electrically connected to the pads are arranged outside the shielding housing, and the electrometer and the energy spectrum collector are connected in parallel. The electrometer is used to collect the leakage parameters of the detector to be tested, and the energy spectrum collector is used to collect the energy spectrum signal of the detector to be tested. Therefore, the present application can evaluate multiple indicators of the detector to be tested, such as leakage, radiation detection accuracy, and radiation detection sensitivity, realize multi-dimensional evaluation of the detector to be tested, and effectively improve the comprehensiveness and accuracy of the evaluation of the detector to be tested.

Description

Technical Field

[0001] This application relates to the technical field of radiation detector evaluation, and more specifically, to a detector evaluation device and method. Background Art

[0002] Cadmium zinc telluride is regarded as the most potential material for manufacturing room-temperature radiation detectors. The growth and processing of cadmium zinc telluride crystals are high-tech and difficult processes, and the process of using detectors to manufacture detection instruments and devices is also very complex and some processes are irreversible. Therefore, it is particularly important to screen out qualified cadmium zinc telluride detectors with excellent performance after the crystals are prepared into detectors.

[0003] When existing radiation detectors leave the factory, due to the relatively single test indicators, it is difficult to comprehensively evaluate the quality of radiation detectors, resulting in uneven quality of radiation detectors when they leave the factory. Summary of the Invention

[0004] The purpose of this application is to provide a detector evaluation device and method, which can comprehensively and accurately evaluate the quality of detectors, aiming at the deficiencies in the above-mentioned existing technologies.

[0005] To achieve the above purpose, the technical solutions adopted in the embodiments of this application are as follows:

[0006] On the one hand, an embodiment of this application provides a detector evaluation device, including: a shielding shell with an inner cavity, a base and a radiation source located in the inner cavity. A evaluation station for placing the detector to be tested is arranged on the base, the radiation source corresponds to the evaluation station, the detector to be tested is electrically connected to the pads of the base, and an electrometer and an energy spectrum collector respectively electrically connected to the pads are arranged outside the shielding shell, and the electrometer and the energy spectrum collector are connected in parallel. The electrometer is used to collect the leakage parameters of the detector to be tested, and the energy spectrum collector is used to collect the energy spectrum signal of the detector to be tested.

[0007] Optionally, the pads include an anode pad and a cathode pad, and clamping components corresponding to the anode pad and the cathode pad are further arranged on the base. The clamping components are used to provide forces to the anode and cathode of the detector to be tested respectively, so that the anode of the detector to be tested is pressed and conducted with the anode pad, and the cathode of the detector to be tested is pressed and conducted with the cathode pad.

[0008] Optionally, the clamping component includes a first elastic member and a first rotating member. The first rotating member is rotatably arranged on the base, and the first elastic member is connected to the first rotating member and used to provide a force to the first rotating member so that the pressing end of the first rotating member has a tendency to abut against the anode pad and the cathode pad.

[0009] Optionally, the base has a sidewall structure, the anode pad and the cathode pad are located on the same side of the sidewall structure, and the first rotating member is rotatably arranged on the side of the sidewall structure close to the anode pad.

[0010] Optionally, the base includes a pillar, a top plate and a bottom plate with an evaluation station. One end of the pillar is fixedly arranged on the bottom plate, and the other end of the pillar extends in a direction away from the plate surface of the bottom plate. The top plate is arranged opposite to the bottom plate, and the top plate is slidably arranged on the pillar along the axis direction of the pillar. The anode pad and the cathode pad are respectively located on the bottom plate and the top plate. The clamping assembly is arranged on the top plate, and the top plate can be clamped with the bottom plate through the clamping assembly so that the anode pad and the cathode pad are respectively pressed against and electrically connected to the anode and the cathode of the detector to be tested.

[0011] Optionally, the clamping assembly includes a second rotating member rotatably arranged on the top plate and a second elastic member connected to the second rotating member. The second rotating member has a hook for cooperating with the bottom plate for clamping, and the second elastic member is used to provide a force to the second rotating member so that the hook has a tendency to remain clamped with the bottom plate.

[0012] Optionally, the bottom plate has a support beryllium sheet at the evaluation station, and the radiation source and the detector to be tested are respectively located on opposite sides of the support beryllium sheet.

[0013] Optionally, conductive films are respectively arranged on the pressing surfaces of the anode pad and the cathode pad.

[0014] Optionally, the detector evaluation device further includes a preamplifier and a main amplifier respectively connected in parallel with the electrometer. The preamplifier and the main amplifier are sequentially connected in series between the pad and the energy spectrum collector.

[0015] Optionally, a shielding interface is arranged on the shielding housing, and the pads are respectively electrically connected to the electrometer and the energy spectrum collector through the shielding interface.

[0016] Optionally, the electrometer and the energy spectrum collector are respectively connected to the terminal by signals.

[0017] On the other hand, an embodiment of the present application provides a method for evaluating a detector, including using the detector evaluation device of any one of the above. The method includes: acquiring a leakage signal collected by the electrometer; determining a leakage parameter of the detector to be tested according to the leakage signal collected by the electrometer; acquiring an energy spectrum signal collected by the energy spectrum collector; determining a count rate parameter and a resolution parameter of the detector to be tested according to the energy spectrum signal collected by the energy spectrum collector; respectively comparing the leakage parameter, the count rate parameter and the resolution parameter with preset similar parameters to determine the evaluation information of the detector to be tested.

[0018] The beneficial effects of the present application include:

[0019] The present application provides a detector evaluation device and method, including: a shielding housing with an inner cavity, a base and a radiation source located in the inner cavity. An evaluation station for placing a detector to be tested is provided on the base, and the radiation source corresponds to the evaluation station. The detector to be tested is electrically connected to the pads on the base. An electrometer and an energy spectrum collector are provided outside the shielding housing and are electrically connected to the pads respectively, and the electrometer and the energy spectrum collector are connected in parallel. The electrometer is used to collect the leakage parameters of the detector to be tested, and the energy spectrum collector is used to collect the energy spectrum signal of the detector to be tested. Therefore, the present application can evaluate multiple indicators of the detector to be tested, such as leakage, radiation detection accuracy, and radiation detection sensitivity, realize multi-dimensional evaluation of the detector to be tested, and effectively improve the comprehensiveness and accuracy of the evaluation of the detector to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 FIG. 9 is a schematic structural diagram of a detector to be tested provided by an embodiment of the present application;

[0022] Figure 2 FIG. 13 is a schematic structural diagram of a detector evaluation device provided by an embodiment of the present application;

[0023] Figure 3 FIG. 17 is a schematic structural diagram of a detector to be tested provided by an embodiment of the present application;

[0024] Figure 4 FIG. 21 is a schematic structural diagram of a detector evaluation device provided by an embodiment of the present application.

[0025] Reference numerals: 100 - detector to be tested; 111 - encapsulation housing; 112 - anode; 113 - cathode; 114 - cadmium zinc telluride crystal; 210 - shielding housing; 211 - radiation source; 212 - shielding interface; 220 - base; 221 - anode pad; 222 - cathode pad; 223 - support pillar; 224 - bottom plate; 225 - third elastic member; 226 - top plate; 227 - supporting beryllium sheet; 230 - clamping assembly; 231 - first rotating member; 232 - first elastic member; 233 - second rotating member; 234 - second elastic member; 235 - hook; 240 - preamplifier; 250 - main amplifier; 260 - energy spectrum collector; 270 - electrometer; 280 - terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application generally described and illustrated in the accompanying drawings here can be arranged and designed in a variety of different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. It should be noted that, without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the scope of protection of this application.

[0028] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of this application are customarily placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "couple" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0032] On the one hand, an embodiment of this application provides a detector evaluation device, such as Figure 2 orFigure 4 As shown in the figure, it includes: a shielding housing 210, a base 220, a radiation source 211, an electrometer 270, and an energy spectrum collector 260. Among them, the shielding housing 210 has an inner cavity, and both the radiation source 211 and the base 220 are located in the inner cavity, while the electrometer 270 and the energy spectrum collector 260 are located outside the shielding housing 210. In this way, on the one hand, the electromagnetic shielding characteristics of the shielding housing 210 can be utilized to shield the electromagnetic signals in the external environment of the shielding housing 210 and prevent the interference of the electromagnetic signals in the environment to the evaluation. On the other hand, the electromagnetic shielding characteristics of the shielding housing 210 can still be utilized to shield electronic devices such as the electrometer 270 and the energy spectrum collector 260 that may emit electromagnetic signals in the detector evaluation device and prevent them from interfering with the evaluation. Thus, the electromagnetic signals inside and outside the detector evaluation device can be effectively shielded simultaneously.

[0033] As Figure 2 or Figure 4 shown in the figure, a base 220 is provided in the inner cavity, and an evaluation station is provided on the base 220. When evaluating the detector 100 to be tested, the detector 100 to be tested can be placed at the evaluation station. A pad is also provided on the base 220, and when the detector 100 to be tested is at the evaluation station, the electrodes of the detector 100 to be tested can be brought into contact conduction with the pad. By setting the evaluation station, the efficiency of placing the detector 100 to be tested at the evaluation station can be improved. It should be understood that the evaluation station can be in various forms such as a groove or a fence on the surface of the base 220, and auxiliary marks such as reference lines can be set on the evaluation station to help the operator quickly and accurately place the detector 100 to be tested.

[0034] As Figure 2 or Figure 4 shown in the figure, in order to evaluate the detector 100 to be tested placed at the evaluation station, a radiation source 211 can also be correspondingly provided in the inner cavity. In this way, during the evaluation, the radiation source 211 can emit radioactive substances, which are received by the detector 100 to be tested, so that the detector 100 to be tested can correspondingly output information for subsequent analysis to obtain evaluation information. It should be understood that the position of the radiation source 211 should correspond to the position of the evaluation station. This correspondence can be a direct correspondence or an inclined correspondence, etc., as long as the radioactive substances emitted by the radiation source 211 can be smoothly received by the detector 100 to be tested. For example Figure 2 or Figure 4 in the figure, the radiation source 211 and the test station correspond up and down. Of course, in different embodiments, the radiation source 211 and the test station can also correspond left and right, front and back, etc.

[0035] As Figure 2 or Figure 4As shown, the electrometer 270 and the energy spectrum collector 260 are located outside the shielding housing 210. Among them, the electrometer 270 is electrically connected to the pads on the base 220, and the energy spectrum collector 260 is also electrically connected to the pads on the base 220. Moreover, the electrometer 270 and the energy spectrum collector 260 are electrically connected to the pads in a parallel manner. In this way, two parallel detection branches can be formed. On the one hand, the electrometer 270 can detect the leakage current of the detector under test 100 and output the corresponding leakage parameters. According to the leakage parameters output by the electrometer 270, it can be determined whether the leakage index of the detector under test 100 is qualified. On the other hand, the energy spectrum collector 260 can detect the radiation detection data output by the detector under test 100 and output the corresponding energy spectrum signal. According to the energy spectrum signal output by the energy spectrum collector 260, it can be determined whether the radiation detection accuracy index, radiation detection sensitivity index, etc. of the detector under test 100 are qualified. Finally, the final evaluation information of the detector under test 100 is output by comprehensively considering various indicators.

[0036] In summary, the present application can evaluate multiple indicators of the detector under test 100, such as leakage, radiation detection accuracy, and radiation detection sensitivity, to achieve multi-dimensional evaluation of the detector under test 100, effectively improving the comprehensiveness and accuracy of the evaluation of the detector under test 100. At the same time, the multi-dimensional evaluation can also be integrated.

[0037] In some embodiments, the shielding housing 210 can be made of aluminum.

[0038] In some embodiments, the detector under test 100 in the present application can be a cadmium zinc telluride detector.

[0039] Optionally, as Figure 1 or Figure 3 shown, the detector under test 100 includes an anode 112 and a cathode 113. As Figure 2 or Figure 4 shown, the pads include an anode pad 221 and a cathode pad 222 located on the base 220. In this way, after the detector under test 100 is placed on the evaluation station, the anode 112 and the anode pad 221 can be brought into contact conduction, and the cathode 113 and the cathode pad 222 can be brought into contact conduction.

[0040] Continue to refer to Figure 2 or Figure 4As shown in the figure, a clamping assembly 230 is further provided on the base 220. The clamping assembly 230 corresponds to the positions of the anode pad 221 and the cathode pad 222 respectively. In this way, after the detector 100 to be tested is placed at the evaluation station, the clamping assembly 230 can apply forces to the anode 112 and the cathode 113 of the detector 100 to be tested respectively, so that the anode 112 of the detector 100 to be tested is press-connected and conducted with the anode pad 221 under the action of the clamping assembly 230. Similarly, the cathode 113 of the detector 100 to be tested is also press-connected and conducted with the cathode pad 222 under the action of the clamping assembly 230. In this way, the contact conduction between the anode 112 and the anode pad 221, and between the cathode 113 and the cathode pad 222 can have a good and reliable electrical connection through the clamping assembly 230. It should be understood that, on the one hand, the clamping assembly 230 should be made of insulating material to avoid additional losses or interference. On the other hand, the clamping assembly 230 can be one or multiple. When the clamping assembly 230 is one, the press-contact conduction between the anode 112 and the anode pad 221, and between the cathode 113 and the cathode pad 222 are all realized by this one clamping assembly 230. When the clamping assembly 230 is two, three or more, they can be correspondingly divided into two groups with equal or unequal numbers. One group is responsible for the press-contact conduction between the anode 112 and the anode pad 221, and the other group is responsible for the press-contact conduction between the cathode 113 and the cathode pad 222. On the other hand, the anode pad 221 and the cathode pad 222 provided on the base 220 should be spaced apart and kept insulated from each other to avoid short-circuiting.

[0041] It should be understood that the cadmium telluride detector can include a cadmium telluride detector with a packaging structure, or can also include a bare cadmium telluride detector. For example Figure 1 As shown, a cadmium telluride detector with a packaging structure is covered with a packaging shell 111 around the bare cadmium telluride detector. Through the packaging shell 111, the internal bare cadmium telluride detector can be well protected. In order to realize the use of the cadmium telluride detector with a packaging structure, the two electrodes of the internal bare cadmium telluride detector can also be led out to the outside of the packaging shell 111 and used as the anode 112 and the cathode 113 respectively. For example Figure 2 As shown, a bare cadmium telluride detector is shown, which does not have a packaging shell 111. Therefore, it is relatively fragile. The bare cadmium telluride detector includes a cadmium telluride crystal 114 and an anode 112 and a cathode 113 covering the opposite sides of the cadmium telluride crystal 114. Since the states of different detectors 100 to be tested are different, the vulnerability degrees shown by them are also different. In order to provide a more comprehensive evaluation, the present application provides the following two methods for evaluating it:

[0042] Example 1: Please refer to Figure 2As shown, when the detector 100 to be measured is a cadmium zinc telluride detector with a packaging housing 111, the clamping assembly 230 includes a first elastic member 232 and a first rotating member 231. The first rotating member 231 is rotatably arranged on the base 220. The first elastic member 232 is connected to the first rotating member 231. The first elastic member 232 can apply a force to the first rotating member 231, so that the pressing end of the first rotating member 231 (the part on the first rotating member 231 that makes the anode 112 and the anode pad 221, and the cathode 113 and the cathode pad 222 in pressing conduction) has a tendency to approach the anode pad 221 and the cathode pad 222 on the base 220. That is, when there is no external force, the first elastic member 232 will drive the first rotating member 231 to rotate relative to the base 220, and this rotation can make the pressing end on the first rotating member 231 move towards the direction close to the anode pad 221 and the cathode pad 222 on the base 220, thereby reducing the distance between the pressing end and the anode pad 221 and the cathode pad 222.

[0043] In actual use, as Figure 2 shown, the first rotating member 231 can be driven by an external force to rotate forward from the initial position, so that the distance between the pressing end of the first rotating member 231 and the anode pad 221 and the cathode pad 222 increases. During this process, the first elastic member 232 stores energy. Then, the detector 100 to be measured is placed at the evaluation station, and the anode 112 and the cathode 113 of the detector 100 to be measured correspond to the anode pad 221 and the cathode pad 222 respectively. After removing the external force, the first elastic member 232 releases energy and drives the first rotating member 231 to rotate reversely, so that the distance between the pressing end on the first rotating member 231 and the anode pad 221 and the cathode pad 222 decreases. Since the anode 112 is located between the pressing end and the anode pad 221, and the cathode 113 is located between the pressing end and the cathode pad 222, therefore, due to the blockage of the thickness of the anode 112 and the cathode 113 themselves, the pressing end cannot return to the initial position, and under the action of the first elastic member 232, the anode 112 and the anode pad 221, and the cathode 113 and the cathode pad 222 are pressed and conducted.

[0044] In some embodiments, the two ends of the elastic member can be respectively connected to the rotating member and the base 220.

[0045] In some embodiments, the base 220 can be a circuit board.

[0046] In some embodiments, as Figure 2As shown, the base 220 may have a side wall structure, that is, a side wall structure is formed in a protruding manner on one side surface of the base 220 where the evaluation station, the anode pad 221, and the cathode pad 222 are provided. The anode pad 221 and the cathode pad 222 may be located on the same side of the side wall structure. The first rotating member 231 may be rotatably arranged on one side of the side wall structure close to the anode pad 221 and the cathode pad 222. In this way, the pressing end of the first rotating member 231 can be located above the anode pad 221 and the cathode pad 222. At the same time, since the first rotating member 231 is arranged on the side wall of the side wall structure, it is convenient for the operator to apply an external force to the first rotating member 231.

[0047] Example 2: Please refer to Figure 4 As shown, when the detector 100 to be tested is a bare cadmium zinc telluride detector, the risk of damage to the detector 100 to be tested during the evaluation process can be reduced by the following method. The base 220 includes a support column 223, a top plate 226, and a bottom plate 224 with an evaluation station. One end of the support column 223 is fixedly arranged on the bottom plate 224 and extends to be fixed to the bottom of the shielding housing 210. The other end of the support column 223 extends in a direction away from the plate surface of the bottom plate 224. The number of support columns 223 can be one, two, three, four, or more, and the present application does not limit it.

[0048] The top plate 226 is arranged opposite to the bottom plate 224. The evaluation station is located on the plate surface of the bottom plate 224 facing the top plate 226, and the cathode pad 222 is located in the evaluation station. The anode pad 221 is located on the plate surface of the top plate 226 facing the bottom plate 224, and the top plate 226 is slidably arranged on the support column 223 along the axial direction of the support column 223. A third elastic member 225 may be arranged on the support column 223 between the top plate 226 and the bottom plate 224. The top plate 226 can be supported by the third elastic member 225, and the third elastic member 225 can provide a force to the top plate 226, so that the top plate 226 has a tendency to slide in a direction away from the bottom plate 224. That is, the bottom plate 224 and the top plate 226 form a clamping structure.

[0049] Meanwhile, a clamping assembly 230 is provided on the top plate 226. Under the action of an external force, after the top plate 226 moves a certain distance in the direction towards the bottom plate 224 (during this process, the third elastic member 225 stores energy), the clamping assembly 230 on the top plate 226 can be engaged with the bottom plate 224, so that the top plate 226 is engaged with the bottom plate 224, and the third elastic member 225 remains in the energy storage state. At this time, the anode pad 221 and the cathode pad 222 are respectively pressed against and electrically connected to the anode 112 and the cathode 113 of the detector 100 to be tested. Then, by applying an external force to the clamping assembly 230, the clamping assembly 230 is disengaged from the bottom plate 224, and the third elastic member 225 releases energy, so that the top plate 226 slides in the direction away from the bottom plate 224. At this time, the anode pad 221 is separated from the anode 112 of the detector 100 to be tested.

[0050] During actual use, as Figure 4 shown, the top plate 226 is disengaged from the bottom plate 224 through the clamping assembly 230. At this time, the top plate 226 is lifted by the third elastic member 225, and the detector 100 to be tested is placed in the evaluation station of the bottom plate 224, and the cathode 113 of the detector 100 to be tested is brought into contact with the cathode pad 222 on the bottom plate 224. The external force drives the top plate 226 to move downward from the initial position, and the third elastic member 225 stores energy. The anode pad 221 approaches the anode 112 on the top surface of the detector 100 to be tested. When the anode pad 221 is pressed against and electrically connected to the anode 112, the corresponding cathode pad 222 is also pressed against and electrically connected to the cathode 113. At this time, the clamping assembly 230 is engaged with the bottom plate 224, the top plate 226 is limited, and the anode 112 and the cathode 113 are respectively and reliably electrically connected to the anode pad 221 and the cathode pad 222. After the evaluation is completed, by driving the clamping assembly 230 to move with an external force, the clamping assembly 230 is disengaged from the bottom plate 224, the third elastic member 225 releases energy, so that the top plate 226 moves upward and returns to the initial position. At this time, the anode pad 221 leaves the anode 112, and the detector 100 to be tested can be taken out.

[0051] In some embodiments, as Figure 4 shown, the clamping assembly 230 includes a second rotating member 233 rotatably provided at the periphery of the top plate 226 and a second elastic member 234 connected to the second rotating member 233. One end of the second rotating member 233 has a hook 235 for engaging with the bottom plate 224. The second elastic member 234 can apply a force to the second rotating member 233, so that the hook 235 of the second rotating member 233 has a tendency to remain in the engaged position (relative to the second rotating member 233). That is, when there is no external force, the second elastic member 234 will drive the second rotating member 233 to rotate relative to the top plate 226, and this rotation can make the hook 235 on the second rotating member 233 located in the engaged position. Therefore, in Figure 4In [the above situation], when the top plate 226 moves downward and after the catch 235 passes over the bottom plate 224, the external force is removed. The catch 235 maintains the latched position under the action of the second elastic member 234. The top plate 226 has a tendency to move upward under the action of the third elastic member 225. However, since the catch 235 is latched with the plate surface of the bottom plate 224, the top plate 226 is limited in position.

[0052] In some embodiments, such as Figure 4 As shown, a guiding wall cooperating with the bottom plate 224 may be provided on one side of the catch 235 close to the bottom plate 224. In this way, during the process of the top plate 226 approaching the bottom plate 224, the guiding wall can contact the bottom plate 224 and push the second rotating member 233 to rotate, so that the catch 235 can squeeze the second elastic member 234 and give way. After the catch 235 passes over the bottom plate 224, it can be reset under the action of the second elastic member 234 to achieve the smooth latching of the catch 235 with the bottom plate 224.

[0053] In some embodiments, the first elastic member 232, the second elastic member 234, and the third elastic member 225 in the present application may all be various elastic components such as tension springs, compression springs, and elastic sheets.

[0054] In some embodiments, the bottom plate 224 may be a circuit board.

[0055] In some embodiments, the pressing surface of the anode pad 221 on the top plate 226 in contact with the anode 112 may be a flat surface, such as the end face of a large-head flat probe, so as to reduce the contact pressure between the anode pad 221 and the anode 112.

[0056] In some embodiments, in order to further protect the exposed cadmium telluride detector, conductive films may be respectively provided on the pressing surfaces of the anode pad 221 and the cathode pad 222. In other words, a conductive film is covered on the anode 112, and a conductive film is covered on the cathode 113, so that the anode pad 221 is in electrical contact with the anode 112 through the conductive film, and the cathode pad 222 is in electrical contact with the cathode 113 through the conductive film.

[0057] Optionally, as Figure 4 shown, the bottom plate 224 has a supporting beryllium sheet 227 at the evaluation station. The radiation source 211 and the detector under test 100 are respectively located on opposite sides of the supporting beryllium sheet 227. In this way, it is convenient for the detector under test 100 to smoothly receive the radioactive substance.

[0058] Optionally, as Figure 2 or Figure 4As shown, the detector evaluation device further includes a preamplifier 240 and a main amplifier 250 that are respectively connected in parallel with the electrometer 270. The pad is electrically connected to the energy spectrum collector 260 through the preamplifier 240 and the main amplifier 250 in sequence. In this way, after the information is output from the pad, the signal is amplified twice by the preamplifier 240 and the main amplifier 250, so that the energy spectrum collector 260 can accurately identify and collect the corresponding signal, and integrate time parameters, amplitude parameters, etc. to form an energy spectrum signal.

[0059] Optionally, as Figure 2 or Figure 4 As shown, a shielding interface 212 with a shielding function is further provided on the shielding housing 210. The shielding interface 212 is connected to the internal pad through a wire. At the same time, the electrometer 270 can be connected to the shielding interface 212 to realize the electrical connection between the electrometer 270 and the internal pad. Similarly, the preamplifier 240 or the energy spectrum collector 260 can also be correspondingly connected to the shielding interface 212 to realize the electrical connection between the energy spectrum collector 260 and the internal pad. Through the shielding interface 212, electromagnetic interference signals can be further shielded, improving the accuracy of the evaluation.

[0060] Optionally, as Figure 2 or Figure 4 As shown, the electrometer 270 and the energy spectrum collector 260 are respectively used for signal connection with the terminal 280. In this way, the electrometer 270 can output a leakage signal to the terminal 280, and the energy spectrum collector 260 can output an energy spectrum signal to the terminal 280, so that the terminal 280 can determine whether the detector 100 to be tested is qualified according to the preset parameters.

[0061] It should be understood that the terminal 280 in this application includes any one of a mobile phone, a tablet computer, a computer, etc., as long as it has the ability of data processing and data interaction. This application does not limit it.

[0062] On the other hand, an embodiment of this application provides a detector evaluation method, including using the detector evaluation device of any one of the above, and the electrometer 270 and the energy spectrum collector 260 are respectively signal-connected to the terminal 280. The method includes:

[0063] The terminal 280 obtains the leakage signal collected by the electrometer 270, and then the terminal 280 determines the leakage parameter of the current detector 100 to be tested according to the leakage signal collected by the electrometer 270.

[0064] The terminal 280 obtains the energy spectrum signal collected by the energy spectrum collector 260, and then the terminal 280 can determine the count rate parameter and resolution parameter of the current detector 100 to be tested according to the energy spectrum signal collected by the energy spectrum collector 260.

[0065] Next, the terminal 280 can compare the leakage parameter with a preset similar parameter (preset leakage parameter) to obtain the leakage information of the current detector 100 to be measured, compare the counting rate parameter with a preset similar parameter (preset counting rate parameter) to obtain the counting rate information of the current detector 100 to be measured, and compare the resolution parameter with a preset similar parameter (preset resolution parameter) to obtain the resolution information of the current detector 100 to be measured. That is, the evaluation information of the detector 100 to be measured includes leakage information, counting rate information, and resolution information.

[0066] It should be understood that, on the one hand, the preset leakage parameter, the preset counting rate parameter, and the preset resolution parameter should all be qualified parameters. On the other hand, under the same evaluation conditions (such as the source distance between the radiation source 211 and the detector 100 to be measured, the activity of the radiation source 211, the detector size, etc.): when the leakage parameter is greater than the preset leakage parameter, it means that the leakage information of the current detector 100 to be measured is unqualified, otherwise the leakage information is qualified (in other words, the smaller the leakage parameter, the better the detector 100 to be measured); when the counting rate parameter is greater than the preset counting rate parameter, it means that the counting rate information of the current detector 100 to be measured is qualified, otherwise the counting rate information is unqualified (in other words, the larger the counting rate parameter, the better the detector 100 to be measured); when the resolution parameter is greater than the preset resolution parameter, it means that the resolution information of the current detector 100 to be measured is unqualified, otherwise the resolution information is qualified (in other words, the smaller the resolution parameter, the better the detector 100 to be measured).

[0067] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A detector evaluation device, characterized in that, Comprising: A shielding housing having an inner cavity, a base and a radiation source located in the inner cavity. An evaluation station for placing a detector to be tested is provided on the base. The radiation source corresponds to the evaluation station. The detector to be tested is electrically connected to pads on the base. An electrometer and an energy spectrum collector respectively electrically connected to the pads are provided outside the shielding housing, and the electrometer and the energy spectrum collector are connected in parallel. The electrometer is used to collect leakage parameters of the detector to be tested, and the energy spectrum collector is used to collect energy spectrum signals of the detector to be tested; The pads include an anode pad and a cathode pad. Clamping assemblies respectively corresponding to the anode pad and the cathode pad are further provided on the base. The clamping assemblies are used to respectively apply forces to the anode and cathode of the detector to be tested, so that the anode of the detector to be tested is pressed and conductively connected to the anode pad, and the cathode of the detector to be tested is pressed and conductively connected to the cathode pad; The base includes a support column, a top plate and a bottom plate having an evaluation station. One end of the support column is fixedly provided on the bottom plate, and the other end of the support column extends in a direction away from the plate surface of the bottom plate. The top plate is disposed opposite to the bottom plate, and the top plate is slidably disposed on the support column along the axis direction of the support column. The anode pad and the cathode pad are respectively located on the bottom plate and the top plate. The clamping assembly is provided on the top plate. The top plate can be clamped to the bottom plate through the clamping assembly, so that the anode pad and the cathode pad are respectively pressed against and conductively connected to the anode and cathode of the detector to be tested.

2. The detector evaluation device according to claim 1, wherein, The clamping assembly includes a second rotating member rotatably disposed on the top plate and a second elastic member connected to the second rotating member. The second rotating member has a hook for cooperating with the bottom plate for clamping. The second elastic member is used to apply a force to the second rotating member, so that the hook has a tendency to remain clamped to the bottom plate.

3. The detector evaluation device according to claim 1, characterized in that, The bottom plate has a supporting beryllium sheet at the evaluation station. The radiation source and the detector to be tested are respectively located on opposite sides of the supporting beryllium sheet; Conductive films are respectively provided on the pressing surfaces of the anode pad and the cathode pad.

4. The detector evaluation device according to claim 1 or 2, characterized in that The detector evaluation device further includes a preamplifier and a main amplifier respectively connected in parallel with the electrometer. The preamplifier and the main amplifier are sequentially connected in series between the pad and the energy spectrum collector.

5. The detector evaluation device according to claim 1 or 2, characterized in that A shielding interface is provided on the shielding housing. The pads are electrically connected to the electrometer and the energy spectrum collector respectively through the shielding interface; The electrometer and the energy spectrum collector are respectively connected to a terminal for signal connection.

6. A detector evaluation method, characterized in that, Including using the detector evaluation device according to any one of claims 1 to 5, the method includes: Obtaining a leakage signal collected by the electrometer; Determining leakage parameters of the detector to be tested according to the leakage signal collected by the electrometer; Obtaining an energy spectrum signal collected by the energy spectrum collector; Determining the count rate parameter and the resolution parameter of the detector to be tested according to the energy spectrum signal collected by the energy spectrum collector; Compare the leakage current parameter, the count rate parameter, and the resolution parameter with the preset parameters of the same type respectively to determine the evaluation information of the detector to be tested.

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