Vacuum adsorption tube for high-purity germanium detector

Abstract

The utility model discloses a kind of vacuum adsorption tubes for high-purity germanium detector, including vacuum tube, cold bar and adsorption module, the vacuum tube is installed at the end of detector body, cold bar is installed in vacuum tube, and adsorption module is fixedly wrapped at cold bar and adsorption module is fixedly installed in vacuum tube;The vacuum adsorption tube for high-purity germanium detector of the present application can effectively prevent the leakage of adsorbent by wrapping the adsorbent between the vacuum tube and the cold bar. The vacuum adsorption tube has a simple structure, is easy to install, stable, and can be used repeatedly for a high number of times. It is convenient for users to use.

Description

Technical Field

[0001] This utility model relates to the field of high-purity germanium semiconductor detectors, specifically to a vacuum adsorption tube for high-purity germanium detectors. Background Technology

[0002] High-purity germanium detectors, considered the "gold standard" in nuclear radiation detection, play an irreplaceable role in key areas such as nuclear power plant safety monitoring, environmental radiation assessment, national security, and cutting-edge basic scientific research. Their stable performance is highly dependent on a high-vacuum working environment: on the one hand, a vacuum environment effectively avoids interference from gas ionization on the detection signal and prevents oxidation reactions of internal components; on the other hand, it avoids the impact of gas adsorption on the detector's sensitivity and stability.

[0003] To further reduce thermal noise during operation, high-purity germanium detectors typically need to operate in extremely low-temperature environments, such as liquid nitrogen temperature (-196°C). Under these conditions, maintaining the effectiveness of the cryogenic environment becomes crucial for preserving the high vacuum level inside the detector. Currently, adding activated carbon as an adsorbent inside the detector is a common method to ensure that the vacuum level inside the cavity meets operational requirements. However, traditional powdered or granular adsorbents pose a risk of leakage when filling the detector's adsorption structure, affecting the detector's detection performance and lifespan. Utility Model Content

[0004] To solve the above technical problems, a tubular unit filled with activated carbon as an adsorbent is provided. This unit can be used as a filler for ordinary cold-finger high-purity germanium detectors, ensuring that the detector performance does not deteriorate due to leakage and ensuring cooling.

[0005] To achieve the above objectives, the following solution is provided: a vacuum adsorption tube for a high-purity germanium detector, comprising a vacuum tube, a cooling rod, and an adsorption module. The vacuum tube is installed at the end of the detector body, the cooling rod is installed inside the vacuum tube, and the adsorption module is fixedly wrapped around the cooling rod and fixedly installed inside the vacuum tube.

[0006] Furthermore, the adsorption module includes a coating layer and an adsorbent. The coating layer is fixedly installed on the outer wall of the cooling rod, and the coating layer wraps around the adsorbent. The coating layer containing the adsorbent has a tubular structure, which fixes the adsorbent in the vacuum tube.

[0007] Furthermore, the wrapping layer is a stainless steel filter screen.

[0008] Furthermore, the adsorbent is an activated carbon adsorbent.

[0009] The working principle and advantages of this utility model are as follows: This high-purity germanium detector uses a vacuum adsorption tube to fix the adsorbent between the vacuum tube and the cooling rod through a wrapping layer, which can effectively prevent adsorbent leakage. In addition, this vacuum adsorption tube has a simple structure, is easy to install, has high stability, and can be reused many times, making it convenient for users. Attached Figure Description

[0010] Figure 1 This is a perspective view of the present utility model;

[0011] Figure 2 This is a structural diagram of the present invention.

[0012] The reference numerals in the accompanying drawings include:

[0013] 1. Detector body, 2. Vacuum tube, 3. Cooling rod, 4. Encapsulation layer, 5. Adsorbent. Detailed Implementation

[0014] The following detailed explanation illustrates the specific implementation methods:

[0015] like Figure 1 and Figure 2 As shown:

[0016] A vacuum adsorption tube for a high-purity germanium detector includes a vacuum tube 2, a cooling rod 3, and an adsorption module. The vacuum tube 2 is installed at the end of the detector body 1, the cooling rod 3 is installed inside the vacuum tube 2, and the adsorption module is fixedly wrapped around the cooling rod 3 and fixedly installed inside the vacuum tube 2. The adsorption module is used to adsorb water vapor inside the vacuum tube 2.

[0017] The adsorption module includes a wrapping layer 4 and an adsorbent 5. The wrapping layer 4 is fixedly installed on the outer wall of the cooling rod 3. The wrapping layer 4 wraps the adsorbent 5. After the wrapping layer 4 wraps the adsorbent 5, it forms a tubular structure, which fixes the adsorbent 5 in the vacuum tube 2, so that the cooling rod 3 can be inserted into it, which can reduce the possibility of adsorbent 5 leakage.

[0018] The fourth layer is a stainless steel filter screen, which has good stability.

[0019] Adsorbent 5 is activated carbon adsorbent 5, which can effectively adsorb gases and water vapor.

[0020] The specific implementation process is as follows:

[0021] In manufacturing this vacuum adsorption tube, after the tubular activated carbon unit is wrapped with a cold finger, heating the outside of the vacuum tube 2 conducts heat to the activated carbon adsorbent 5, causing the gas or water vapor inside the activated carbon adsorbent 5 to be released. Then, a vacuum pump is used to extract the released gas or water vapor from the vacuum tube 2. Finally, taking advantage of the "high-temperature release and low-temperature absorption" characteristics of the activated carbon adsorbent 5, the vacuum tube 2 is heated and disconnected, allowing it to return to room temperature and then cooled. The activated carbon adsorbent 5 then adsorbs the gas and water vapor that may be released from the internal components of the detector body 1 under vacuum conditions, thereby maintaining a high vacuum level inside the cavity.

[0022] This high-purity germanium detector uses a vacuum adsorption tube to fix the adsorbent 5 between the vacuum tube 2 and the cooling rod 3 through a wrapping layer 4, which can effectively prevent the adsorbent 5 from leaking. In addition, this vacuum adsorption tube has a simple structure, is easy to install, has high stability, and can be reused many times, making it convenient for users.

[0023] The above description is merely an embodiment of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the applicability of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A vacuum adsorption tube for a high-purity germanium detector, characterized in that: It includes a vacuum tube, a cooling rod, and an adsorption module. The vacuum tube is installed at the end of the detector body, the cooling rod is installed inside the vacuum tube, and the adsorption module is fixedly wrapped around the cooling rod and fixedly installed inside the vacuum tube.

2. The vacuum adsorption tube for a high-purity germanium detector according to claim 1, characterized in that: The adsorption module includes a coating layer and an adsorbent. The coating layer is fixedly installed on the outer wall of the cooling rod. The coating layer wraps around the adsorbent. The coating layer containing the adsorbent has a tubular structure, which fixes the adsorbent in the vacuum tube.

3. The vacuum adsorption tube for a high-purity germanium detector according to claim 2, characterized in that: The wrapping layer is a stainless steel filter screen.

4. The vacuum adsorption tube for a high-purity germanium detector according to claim 1, characterized in that: The adsorbent is activated carbon.

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