Auxiliary debugging device of electrical refrigeration high-purity germanium detector

Abstract

The utility model discloses an auxiliary debugging device of an electrical refrigeration high-purity germanium detector, which comprises a first cold conduction copper rod of the high-purity germanium detector. The auxiliary debugging device of the electrical refrigeration high-purity germanium detector comprises a first cold conduction point arranged on a first cold conduction copper rod and an external cold source matched with the first cold conduction point on the first cold conduction copper rod for refrigeration, and the external cold source comprises an external movable cold conduction point and a cold source container for containing a refrigerant. And a refrigerant of the cold source container is connected with the external movable cold conduction point through a cold conduction structure. According to the scheme, it can be guaranteed that the temperature of the electrical refrigeration high-purity germanium detector cannot return due to closing of the low-temperature refrigerator, and switching electrical refrigeration performance comparison can be conveniently carried out when the electrical refrigeration high-purity germanium detector is debugged, so that the debugging effect is better obtained.

Description

Technical Field

[0001] This utility model relates to a high-purity germanium detector, and more specifically, to an auxiliary debugging device for an electrically cooled high-purity germanium detector. Background Technology

[0002] High-purity germanium (HPGe) detectors are high-energy-resolution nuclear radiation detectors widely used in nuclear power, environmental protection, and homeland security. However, HPGe detectors require a cryogenic environment close to liquid nitrogen temperature to operate, typically using liquid nitrogen as the cold source. In recent years, with the continuous development of cryogenic technology, Stirling cryogenic refrigerators have become increasingly popular as a replacement for liquid nitrogen as the detector's cold source. Compared to traditional liquid nitrogen cooling, electric cooling fulfills the requirement that HPGe detectors can operate with electricity, greatly improving system convenience. However, the introduction of Stirling cryogenic refrigerators introduces electromagnetic interference into the system, requiring extensive debugging and testing to identify and eliminate the interference sources. This process necessitates frequent switching of the cryogenic refrigerator, sometimes causing the electrically cooled HPGe detector to reheat, significantly impacting the debugging progress. Therefore, how to achieve auxiliary cooling during the switching of the cryogenic refrigerator is a problem that the industry needs to solve. Summary of the Invention

[0003] This invention provides an auxiliary debugging device for an electrically cooled high-purity germanium detector, which can achieve auxiliary cooling during the switching on and off of a cryogenic refrigerator.

[0004] To address the aforementioned problems, this utility model provides an auxiliary debugging device for an electrically cooled high-purity germanium detector. The electrically cooled high-purity germanium detector includes a first cooling copper rod. The auxiliary debugging device includes a first cooling point disposed on the first cooling copper rod and an external cold source that cooperates with the first cooling point for cooling. The external cold source includes an externally movable cooling point and a cold source container holding refrigerant. The refrigerant in the cold source container is connected to the externally movable cooling point through a cooling structure.

[0005] In some embodiments, the external movable cooling point includes a second cooling point and a movable stop disposed on the second cooling point.

[0006] In some embodiments, a heat insulation layer is provided on the second cooling point to form a thermal insulation area of ​​the external movable cooling point.

[0007] In some embodiments, the first cooling point is a protrusion provided on the first cooling copper rod.

[0008] In some embodiments, the first cooling copper rod is disposed in a first vacuum structure, which is a vacuum shroud.

[0009] In some embodiments, the cooling structure is a second cooling rod that connects an external movable cooling point to the refrigerant.

[0010] In some embodiments, the second cooling copper rod is disposed in the second vacuum structure.

[0011] In some embodiments, the second vacuum structure is a vacuum tube.

[0012] In some embodiments, the electrically cooled high-purity germanium detector includes a cryogenic refrigerator, and when the cryogenic refrigerator is turned off, the external movable cooling point is connected to the first cooling point on the first cooling copper rod.

[0013] In some embodiments, the refrigerant is liquid nitrogen.

[0014] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects:

[0015] The auxiliary debugging device for the electrically cooled high-purity germanium detector provided in this application includes a first cooling copper rod. The auxiliary debugging device includes a first cooling point disposed on the first cooling copper rod and an external cold source that cooperates with the first cooling point for cooling. The external cold source includes an external movable cooling point and a cold source container holding refrigerant. The refrigerant in the cold source container is connected to the external movable cooling point through a cooling structure. When the cryogenic refrigerator in the electrically cooled high-purity germanium detector system is turned off, the external cold source can provide cooling to the detector, ensuring that the detector does not reheat due to the shutdown of the cryogenic refrigerator. This also facilitates the comparison of the switching cooling performance during the debugging of the detector, leading to better debugging results. Attached Figure Description

[0016] To more clearly illustrate the implementation scheme of this utility model application, the accompanying drawings used in this application will be briefly described below.

[0017] Figure 1 This is a schematic diagram of the structure of a conventional electrically cooled high-purity germanium detector according to some embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the structure of an auxiliary debugging device for an electrically cooled high-purity germanium detector according to some embodiments of this application. Detailed Implementation

[0019] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are all exemplary embodiments and should not be construed as limiting the present utility model patent.

[0020] refer to Figure 1 As shown in the figure, this is a schematic diagram of the structure of an existing electrically cooled high-purity germanium detector. The electrically cooled high-purity germanium detector includes a high-purity germanium detector 1, a vacuum chamber 2, a first cooling copper rod 3, a vacuum chamber 4, and a cryogenic refrigerator 5. A vacuum structure is formed inside the vacuum chamber 2. Both the high-purity germanium detector 1 and the first cooling copper rod 3 of the high-purity germanium detector are placed inside the vacuum chamber. When the electrically cooled high-purity germanium detector system is working, the cooling energy generated by the cryogenic refrigerator 5 is conducted to the detector probe of the high-purity germanium detector 1 through the first cooling copper rod 3, thereby enabling the high-purity germanium detector 1 to reach the working temperature. The transmission path of the first cooling copper rod 3 adopts a vacuum form to reduce heat loss.

[0021] refer to Figure 2 As shown in the figure, this is a schematic diagram of the structure of an auxiliary debugging device for an electrically cooled high-purity germanium detector according to some embodiments of this application. In this embodiment, the auxiliary debugging device for the electrically cooled high-purity germanium detector includes a first cooling point 6 disposed on a first cooling copper rod 3 of the high-purity germanium detector 1, and an external cold source that cooperates with the first cooling point 6 on the first cooling copper rod 3 for cooling. The external cold source includes an externally movable cooling point and a cold source container 10 containing refrigerant. The refrigerant in the cold source container 10 is connected to the externally movable cooling point through a cooling structure. By setting the first cooling point 6 and the movable cooling point to cooperate with each other, the external cooling capacity is introduced.

[0022] In some embodiments, the aforementioned external movable cooling point may include a second cooling point 12 and a movable stop 7 disposed on the second cooling point 12. In addition, in this application, a heat insulation layer may be disposed on the second cooling point 12 to form a thermal insulation area 11 of the external movable cooling point, so as to reduce unnecessary cold loss when the external cold source is used.

[0023] In some embodiments, the first cooling point 6 can be set as a protruding point on the first cooling copper rod. In specific implementation, other connection structures can also be used, which are not specifically limited here.

[0024] It should be noted that the above-mentioned cooling structure in this application is a second cooling rod 8 that connects the external movable cooling point to the refrigerant. In specific implementation, the second cooling copper rod 8 is set in the second vacuum structure. The second vacuum structure can be a vacuum tube or other similar vacuum structure, that is, the second cooling copper rod 8 is set in the vacuum 9 of the vacuum tube. No specific limitation is made here.

[0025] The working principle of the auxiliary debugging device for the above-mentioned electrically cooled high-purity germanium detector is as follows:

[0026] When debugging is required, the movable stop 7 is removed, and the external cold source is aligned with the second cold-conducting point 12, connecting the second cold-conducting point 12 with the first cold-conducting point 6. This enables the electrically cooled high-purity germanium detector to obtain cooling from the external cold source. After debugging is completed, the cryogenic refrigerator is turned on. Once the temperature of the electrically cooled high-purity germanium detector stabilizes, the external cold source is removed, and the movable stop 7 is moved to block the second cold-conducting point 12. The second cold-conducting point 12 is no longer connected to the first cold-conducting point 6 and is cooled solely by the cryogenic refrigerator. Therefore, when the cryogenic refrigerator in the electrically cooled high-purity germanium detector system is turned off, cooling can still be provided to the detector from an external cold source. This ensures that the electrically cooled high-purity germanium detector will not reheat due to the shutdown of the cryogenic refrigerator and facilitates on / off performance comparison during debugging, leading to better debugging results.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An auxiliary debugging device for an electrically cooled high-purity germanium detector, the electrically cooled high-purity germanium detector comprising a first cooling copper rod, characterized in that, The auxiliary debugging device for the electrically cooled high-purity germanium detector includes a first cooling point disposed on the first cooling copper rod and an external cold source that cooperates with the first cooling point on the first cooling copper rod for cooling. The external cold source includes an external movable cooling point and a cold source container that contains refrigerant. The refrigerant in the cold source container is connected to the external movable cooling point through a cooling structure.

2. The apparatus according to claim 1, characterized in that, The external movable cooling point includes a second cooling point and a movable stop block disposed on the second cooling point.

3. The apparatus according to claim 2, characterized in that, A heat insulation layer is provided on the second cooling point to form a thermal insulation area of ​​the external movable cooling point.

4. The apparatus according to claim 1, characterized in that, The first cooling point is a protruding point set on the first cooling copper rod.

5. The apparatus according to claim 1, characterized in that, The first cooling copper rod is disposed in the first vacuum structure, which is a vacuum cover.

6. The apparatus according to claim 1, characterized in that, The cooling structure is a second cooling copper rod that connects an externally movable cooling point to the refrigerant.

7. The apparatus according to claim 6, characterized in that, The second cooling copper rod is disposed in the second vacuum structure.

8. The apparatus according to claim 7, characterized in that, The second vacuum structure is a vacuum tube.

9. The apparatus according to claim 1, characterized in that, The electrically cooled high-purity germanium detector includes a cryogenic refrigerator. When the cryogenic refrigerator is turned off, the external movable cooling point is connected to the first cooling point on the first cooling copper rod.

10. The apparatus according to claim 1, characterized in that, The refrigerant is liquid nitrogen.

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