CN116482742A - Portable high-purity germanium detector with two-stage refrigeration structure - Google Patents
Portable high-purity germanium detector with two-stage refrigeration structure Download PDFInfo
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- CN116482742A CN116482742A CN202310563306.7A CN202310563306A CN116482742A CN 116482742 A CN116482742 A CN 116482742A CN 202310563306 A CN202310563306 A CN 202310563306A CN 116482742 A CN116482742 A CN 116482742A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 88
- 229910052732 germanium Inorganic materials 0.000 title claims abstract description 42
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 229920000271 Kevlar® Polymers 0.000 claims description 3
- 239000004761 kevlar Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 239000008358 core component Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012857 radioactive material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/24—Measuring radiation intensity with semiconductor detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
A portable high purity germanium detector of a two-stage refrigeration structure comprising: a detector body; the detector first shell is arranged outside the detector body and is separated from the detector body to form a first vacuum cavity; the detector second shell is arranged outside the first shell and is separated from the first shell so as to form a second vacuum cavity; the first refrigeration interface is arranged between the first shell of the detector and the second shell of the detector in a penetrating way, and is connected with the first shell and an external refrigerator to realize primary refrigeration; the second refrigeration interface is arranged on the second shell of the detector and is connected with the first shell and the system refrigerator to realize secondary refrigeration. The refrigerating process of the detector body and the first shell of the detector is creatively divided into two stages, the first stage of rapid refrigeration is realized through the first refrigerating interface, the further second stage of refrigeration and long-time low-temperature maintenance are realized through the second refrigerating interface, and the refrigerating time is effectively shortened.
Description
Technical Field
The invention belongs to the technical field of detectors, and particularly relates to a portable high-purity germanium detector with a two-stage refrigeration structure.
Background
The energy of gamma rays can be used as a "fingerprint" to identify a particular radioactive material, and thus radioactive materials are typically detected and identified by gamma rays emitted from the material under test. The high-purity germanium detector has better sensitivity and identification capability, and is one of the detectors with higher resolution at present.
In order to ensure the forbidden band width of the high-purity germanium crystal, the working environment of the high-purity germanium detector needs to be maintained in a low-temperature (lower than 100K) and high-static vacuum state, and the traditional refrigeration technology comprises liquid nitrogen refrigeration and electric refrigeration, wherein the liquid nitrogen refrigeration is matched with the high-purity germanium detector for use because a Dewar bottle needs to be equipped, the electric refrigeration needs to be equipped with a high-power electric refrigeration engine, the detection system is large in complex volume, and the outdoor portable use is inconvenient.
With the development of technology and the excavation of more application scenes, new requirements are also put forward on the innovation of the technology. For example, the high-purity germanium detector is strategically located in the fields of homeland security, nuclear emergency and the like, and is used as one of core components. Some uncertain accidents or emergency events based thereon require the use of high purity germanium detectors in outdoor, even field, scenarios. The existing portable high-purity germanium detector is suitable for the scene, the general volume is smaller, the integration level of a liquid nitrogen refrigerating mode and the high-purity germanium detector is low, portability is not facilitated, and the limitation of longer refrigerating time caused by short liquid nitrogen using time and high filling frequency exists. On the other hand, the electric refrigeration mode has the limitation that the refrigeration time is longer due to the relatively smaller power of the standby battery, and the like, which can lead to the portable high-purity germanium detector to be longer in refrigeration time, even more than 12 hours, and the longer waiting time is difficult to be applied to specific outdoor and emergency scenes.
In view of this, how to realize rapid refrigeration is an important index of the portable high-purity germanium detector, is an important guarantee for coping with various emergency events outdoors, and is one of the technical difficulties to be solved in the field.
Disclosure of Invention
In view of this, the embodiment of the invention provides a portable high-purity germanium detector with a two-stage refrigeration structure, so as to realize rapid refrigeration of the detector, and the portable high-purity germanium detector is applied to outdoor emergency scenes and the like.
A portable high purity germanium detector of a two stage refrigeration configuration comprising: a detector body; the detector first shell is arranged outside the detector body and is separated from the detector body to form a first vacuum cavity; a probe second housing disposed outside the first housing, spaced apart from the first housing, to form a second vacuum chamber; the first refrigeration interface is arranged between the first shell of the detector and the second shell of the detector in a penetrating way, and is connected with the first shell and an external refrigerator to realize primary refrigeration; the second refrigeration interface is arranged on the second shell of the detector and is connected with the first shell and the system refrigerator to realize secondary refrigeration.
In one embodiment, the first refrigeration interface includes a first cold finger, a plug tube, and a plug;
one end of the first cold finger is physically connected with the first shell, and the other end of the first cold finger is arranged on the second shell and is used for being connected with an external high-power refrigerator; two ends of the plugging tube are respectively fixed on the first shell of the detector and the second shell of the detector; the pipe diameter of the plugging plug is in interference fit with that of the plugging pipe, and the first cold finger stretches into the plugging plug to stretch into the plugging pipe to be connected with the first shell of the detector; the second vacuum cavity, the first cold finger and the external space are separated by the plugging tube and the plugging plug, and the second vacuum cavity and the plugging tube are high in vacuum degree.
In an embodiment, the second refrigeration interface includes a second cold finger and a thermally conductive member; one end of the second cold finger penetrates through the second shell to extend into the second vacuum cavity and is fixedly connected with the first shell; the other end of the second cold finger is connected with a system refrigerator; one end of the heat conducting piece is fixedly connected with one end of the second cold finger extending into the second vacuum cavity, and the other end of the heat conducting piece is fixedly connected with the first shell.
In one embodiment, a structured mounting assembly is disposed between the first and second housings of the detector; the structured mounting assembly includes a pin click tie bar disposed at opposite ends of the first and second housings, respectively.
In one embodiment, the structured mounting assembly further comprises a fastener; the pin point tie bars are arranged on the first shell and the second shell of the detector in pairs, and the pin point tie bars are fastened in tension by fasteners.
In one embodiment, the coating further comprises a low-emissivity infrared reflective coating; the low-radiation infrared reflection coating is respectively arranged on the inner wall and the outer wall of the first detector shell and the inner wall of the second detector shell by the first detector shell and the second detector shell so as to prevent heat radiation.
In one embodiment, the device further comprises an adsorption layer; the adsorption layer is arranged in the radial direction of the second shell of the detector so as to adsorb residual gas in the second vacuum cavity.
In one embodiment, the pin-point tie bar is a conductive screw,
in one embodiment, the fastener is a Kevlar.
In one embodiment, the occlusion tube is a vacuum bellows.
According to the portable high-purity germanium detector with the two-stage refrigeration structure, the refrigeration process of the detector body and the first shell of the detector is creatively divided into two stages, the first-stage rapid refrigeration is realized by connecting an external high-power refrigerator through a first refrigeration interface, the further second-stage refrigeration and long-time low-temperature maintenance are realized by connecting a system refrigerator through a second refrigeration interface, the integral refrigeration time of the portable high-purity germanium detector is finally effectively shortened, and the service time of the detector body is prolonged.
Compared with the prior art which generally adopts a direct refrigeration mode, the traditional refrigeration time is shortened to about 6 hours from about 12 hours, the refrigeration efficiency is greatly improved, the portable outdoor environment monitoring system can be better adapted to portable use of outdoor scenes, is suitable for sudden or emergent events, and is favorable for emergent radiation monitoring.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a portable high purity germanium detector with a two-stage refrigeration structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first refrigeration interface configuration of FIG. 1, partially enlarged;
FIG. 3 is a schematic view of the structured mount of the first housing and the second housing of the sonde of FIG. 1.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to illustrate the technical scheme of the portable high-purity germanium detector with the two-stage refrigeration structure, the following description is made by a specific embodiment.
Referring now to fig. 1 to 3, a portable high purity germanium detector 1000 of a two-stage refrigeration structure according to an embodiment of the present application includes: the probe body 10, the probe first and second housings 20, 30, the first and second refrigeration interfaces 40, 50, and the system refrigerator 60.
The detector body 10, which is mainly made of germanium crystal, is a core component of the detector and also a core component requiring cooling, and is used for detecting nuclear radiation.
The first housing 20 of the prober is disposed outside the prober body 10 and is spaced apart from the prober body 10 to form a first vacuum chamber 201. The first vacuum cavity 201 is in a vacuum state, and the detector body 10 is placed in the vacuum cavity, which is equivalent to coating the detector body 10 with a vacuum layer, so that a high vacuum ultra-clean working environment can be provided for the detector body 10, and the effects of heat preservation and heat insulation can be achieved.
The second housing 30 of the prober is disposed outside the first housing 20 of the prober and is spaced apart from the first housing 20 of the prober to form a second vacuum chamber 301. The second vacuum chamber 301 is in a vacuum state, and the first detector housing 20 is placed in the vacuum chamber, which is equivalent to coating the first detector housing 20 with a vacuum layer, and meanwhile, plays roles of protection, heat preservation and heat insulation.
The first vacuum chamber 201 and the second vacuum chamber 301 are two independent vacuum chambers, so that the influence of mechanical vibration of the high-power external refrigerator (not shown) and the system refrigerator 60 on the detector body 10 can be reduced, and the shock-proof effect is achieved to maintain the performance index of the detector body 10.
The first refrigeration interface 40 includes a first cold finger 41, a plug tube 42, and a plug 43. Specifically, the first refrigeration interface 40 is disposed between the first detector housing 20 and the second detector housing 30 in a penetrating manner, and is connected to the high-power external refrigerator through the first cold finger 41 to perform primary rapid refrigeration on the first detector body 10 and the first detector housing 20, and the first detector housing 20 is connected to the second detector housing 30 through the plugging tube 42, and the plugging plug 43 is disposed at the connection between the plugging tube 42 and the second detector housing 30. One end of the first cold finger 41 passes through the blocking plug 43 to be connected with a high-power external refrigerator, and the other end of the first cold finger 41 passes through the blocking plug 43 to extend into the blocking tube 42 to be in physical contact with the first housing 20 of the detector.
Specifically, the plugging plug 43 is in interference fit with the pipe diameter of the plugging pipe 42, and separates the second vacuum cavity 301 from the plugging pipe 42 and the external space, so as to maintain the high vacuum degree of the second vacuum cavity 301, avoid polluting the working environment of the detector body 10, influence the performance index of the detector body 10, and simultaneously play a role in heat preservation and heat insulation on the first cold finger 41 positioned in the plugging pipe 42.
The second refrigeration interface 50 includes a second cold finger 51 and a thermally conductive member 52. Specifically, the second refrigeration interface 50 is disposed on the second shell 30 of the detector, and is connected to the system refrigerator 60 through the second cold finger 51 for performing secondary refrigeration, the second cold finger 51 passes through the second shell 30 of the detector and is fixedly welded, one end of the second cold finger 51 is connected to the system refrigerator 60, and the other end of the second cold finger 51 passes through the second shell 30, extends into the second vacuum cavity 301, and is fixedly connected to the first shell 20 of the detector through the heat conducting member 52.
It should be noted that, in the system assembly, the first vacuum chamber 201 and the second vacuum chamber 301 need to be evacuated before packaging to form a high vacuum layer.
The portable high-purity germanium detector 1000 with the two-stage refrigeration structure comprises a detector body 10 with detection capability, a first detector shell 20, a second detector shell 30, and a novel structure with a first refrigeration interface 40 and a second refrigeration interface 50 with rapid refrigeration capability, wherein the refrigeration process of the detector body 10 and the first detector shell 20 is creatively divided into two stages, the first-stage rapid refrigeration is realized by connecting an external high-power refrigerator (not shown) through the first refrigeration interface 40, the further secondary refrigeration and long-time low-temperature maintenance are realized by connecting a system refrigerator 60 through the second refrigeration interface 50, the whole refrigeration time of the portable high-purity germanium detector is finally and effectively shortened, and the service time of the detector body 10 is prolonged. Compared with the prior art which generally adopts a direct refrigeration mode, the traditional refrigeration time is shortened to about 6 hours from about 12 hours, the refrigeration efficiency is greatly improved, the portable outdoor environment monitoring system can be better adapted to portable use of outdoor scenes, is suitable for sudden or emergent events, and is favorable for emergent radiation monitoring.
In one embodiment of the present application, the system refrigerator 60 is a Stirling electric refrigerator, and the high power external refrigerator is a high power Stirling electric refrigerator, which is an electric refrigerator capable of maintaining the operating temperature of the high purity germanium detector.
The first refrigeration interface 40 is connected to an external high-power stirling electric refrigerator through a first cold finger 41, and can quickly cool the detector body 10 and the detector first housing 20, and quickly reduce the temperature of the detector body 10 and the detector first housing 20 to a predetermined temperature, for example, a near-high-purity germanium detector operating temperature of 100K.
When the portable high-purity germanium detector needs to perform outdoor work, the external refrigerator can be disconnected, the detector body 10 and the detector first shell 20 are further cooled to a stable working state by the system refrigerator 60 through the second refrigeration interface 50, and the temperature is maintained for a long time, so that the outdoor radiation detection is facilitated.
According to the portable high-purity germanium detector 1000 with the two-stage refrigeration structure, the refrigeration process of the detector body 10 and the detector first shell 20 is creatively divided into two stages through the two refrigeration interfaces, namely the first refrigeration interface 40 and the second refrigeration interface 50, the temperature of the detector body 10 and the temperature of the detector first shell 20 can be quickly reduced to a preset temperature by connecting a high-power external refrigerator, after the external refrigerator is disconnected, the temperature of the detector body 10 and the temperature of the detector first shell 20 can be continuously reduced to the working temperature (for example, 100K or below) of the high-purity germanium detector by utilizing the system refrigerator 60 and the second refrigeration interface 50, the long-time low-temperature maintenance is performed, the refrigeration time of the portable high-purity germanium detector can be effectively shortened, the working efficiency of the detector can be improved, the outdoor portable service time of the detector can be prolonged, and meanwhile, the influence of the mechanical vibration of the refrigerator on the detector can be reduced by the second vacuum cavity 301, so that the performance index of the detector body 10 can be maintained.
According to another embodiment of the present application, the structural mount 70 includes pin point posts (71, 72), tie-down members 73, and the structural mount 70 suspends the sonde first housing 20 from the sonde second housing 30. Specifically, the outer wall of the first housing 20 is provided at both radial ends thereof with a plurality of pin-point tie bars 71, the inner wall of the second housing 30 is provided at both radial ends thereof with a plurality of pin-point tie bars 72, the pin-point tie bars 71 and the pin-point tie bars 72 are provided in pairs and are tension-fastened by the fasteners 73, and the pairs of pin-point tie bars 71 and the pin-point tie bars 72 can be extended in the same or opposite directions to adjust the hanging installation position of the first housing 20.
Further, the structured mounting member 70 has a total of eight pairs of pin-point tie bars, four pin-point tie bars 71 are provided at each of both ends of the outer wall of the first housing 20 of the probe, four pin-point tie bars 72 are provided at each of both ends of the inner wall of the second housing 30 of the probe, the pin-point tie bars 71 are small in pitch, and the pin-point tie bars 72 are large in pitch. To secure the sonde first housing 20, the sonde first housing 20 and the sonde second housing 30 are prevented from direct contact, and a plurality of pairs of tie bars 71 and 72 are tension-tightened, coaxially secured and positioned relative to each other, using fasteners 73.
In one embodiment, the tie 73 is configured as a kevlar string. The pin-point tie bars 71 and 72 are identical in structural characteristics, and can be installed by selecting different structures according to installation requirements. In addition, the pin-tie bars 71 and 72 are connected to the respective housings by conductive screws to create a metal-to-metal connection and to prevent the detector second housing 30 from creating a thermal shunt to the detector first housing 20 by the thermal resistance of the tie-down members 73 connecting the plurality of tie-down bar pairs.
The first housing 20 is suspended from the second housing 30 in a non-contact manner to provide both impact resistance and thermal insulation. The thermal insulation is due to the effect of the reduced heat conduction and the low emissivity infrared reflective coating. The shell perforation affects the thermal insulation performance of the infrared reflective coating, so the multiple pin tie bars of the structured mount 70 of the present application are installed in a non-perforated manner, minimizing shell perforation through a two-stage refrigeration structure maximizes the thermal insulation effect of the infrared reflective coating to extend the operating time of the detector body 10.
It is noted that the portable high purity germanium detector 1000 of the two-stage refrigeration structure of the present application can achieve overall low thermal load without using auxiliary means to perform thermal insulation protection. The ratio of the surface areas of the second housing 30 and the first housing 20 is one of the key factors affecting the overall thermal load of the system, and the present application achieves a low thermal load of the system as a whole by minimizing the ratio of the surface area of the second housing 30 to the surface area of the first housing 20, rather than thermally isolating by auxiliary means.
According to another embodiment of the present application, the ratio of the inner surface area of the probe second housing 30 to the outer surface area of the probe first housing 20 is 1.5.
In addition, the first and second detector housings 20 and 30 further include a low-emissivity infrared reflective coating 80, and the low-emissivity infrared reflective coating 80 is disposed on the inner and outer walls of the first detector housing 20 and the inner wall of the second detector housing 30 to prevent heat leakage from the first and second detector housings 20 and 30. In this embodiment, the low emissivity infrared reflective coating 80 is configured as a high-polishing gold coating.
According to one embodiment of the present application, the second housing 30 further comprises an adsorption layer 90 disposed in a radial direction of the inner wall of the second housing 30 for adsorbing residual gas in the second vacuum chamber 301.
The first vacuum chamber 201 and the second vacuum chamber 301 are evacuated to a high vacuum during the early stage packaging process, and the high vacuum environment is maintained in the later stage due to parts between the first housing 20 and the second housing 30, for example: the mounting member 70, the low-radiation infrared reflective coating 80 and the like can release trace gas to damage the core component of the detector body 10, so that the adsorption layer 90 is arranged in the second shell 30 of the detector to timely absorb residual gas released by the parts in the second vacuum cavity 301, and finally the vacuum low-temperature constant-temperature environment in the second shell is realized.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A portable high purity germanium detector of two-stage refrigeration structure, comprising:
a detector body;
the detector first shell is arranged outside the detector body and is separated from the detector body to form a first vacuum cavity;
a probe second housing disposed outside the first housing, spaced apart from the first housing, to form a second vacuum chamber;
the first refrigeration interface is arranged between the first shell of the detector and the second shell of the detector in a penetrating way, and is connected with the first shell and an external refrigerator to realize primary refrigeration;
the second refrigeration interface is arranged on the second shell of the detector and is connected with the first shell and the system refrigerator to realize secondary refrigeration.
2. The portable high purity germanium detector of two stage refrigeration architecture of claim 1 wherein said first refrigeration interface comprises a first cold finger, a plug tube and a plug;
one end of the first cold finger is physically connected with the first shell, and the other end of the first cold finger is arranged on the second shell and is used for being connected with an external high-power refrigerator;
two ends of the plugging tube are respectively fixed on the first shell of the detector and the second shell of the detector; and
the pipe diameter of the plugging plug is in interference fit with that of the plugging pipe, and the first cold finger stretches into the plugging plug to stretch into the plugging pipe to be connected with the first shell of the detector;
the second vacuum cavity, the first cold finger and the external space are separated by the plugging tube and the plugging plug, and the second vacuum cavity and the plugging tube are high in vacuum degree.
3. The portable high purity germanium detector of two stage refrigeration construction of claim 1 or 2 wherein said second refrigeration interface comprises a second cold finger and a thermally conductive member;
one end of the second cold finger penetrates through the second shell to extend into the second vacuum cavity and is fixedly connected with the first shell; the other end of the second cold finger is connected with a system refrigerator;
one end of the heat conducting piece is fixedly connected with one end of the second cold finger extending into the second vacuum cavity, and the other end of the heat conducting piece is fixedly connected with the first shell.
4. A portable high purity germanium detector of two stage refrigeration construction according to claim 3 wherein a structured mounting assembly is provided between said detector first housing and said detector second housing;
the structured mounting assembly includes a pin click tie bar disposed at opposite ends of the first and second housings, respectively.
5. The portable high purity germanium detector of two stage refrigeration construction of claim 4 wherein said structured mounting assembly further comprises a tie;
the pin point tie bars are arranged on the first shell and the second shell of the detector in pairs, and the pin point tie bars are fastened in tension by fasteners.
6. The portable high purity germanium detector of two stage refrigeration construction of claim 4 or 5 further comprising a low emissivity infrared reflective coating;
the low-radiation infrared reflection coating is respectively arranged on the inner wall and the outer wall of the first detector shell and the inner wall of the second detector shell by the first detector shell and the second detector shell so as to prevent heat radiation.
7. The portable high purity germanium detector of two stage refrigeration construction of claim 6 further comprising an adsorption layer; the adsorption layer is arranged in the radial direction of the second shell of the detector so as to adsorb residual gas in the second vacuum cavity.
8. The portable high purity germanium detector of two stage refrigeration construction of claim 7 wherein said pin point tie bar is a conductive screw.
9. The portable high purity germanium detector of claim 8 wherein said tie is a kevlar wire.
10. The portable high purity germanium detector of claim 9 wherein said occlusion tube is a vacuum bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310563306.7A CN116482742A (en) | 2023-05-18 | 2023-05-18 | Portable high-purity germanium detector with two-stage refrigeration structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310563306.7A CN116482742A (en) | 2023-05-18 | 2023-05-18 | Portable high-purity germanium detector with two-stage refrigeration structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116482742A true CN116482742A (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310563306.7A Pending CN116482742A (en) | 2023-05-18 | 2023-05-18 | Portable high-purity germanium detector with two-stage refrigeration structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116482742A (en) |
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2023
- 2023-05-18 CN CN202310563306.7A patent/CN116482742A/en active Pending
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