Neutron detector
By alternately connecting multiple neutron proportional counting tubes and connectors in series, the detection body and signal extraction structure of the neutron detector are formed, which solves the problem of insufficient neutron sensitivity of traditional neutron detectors, and improves sensitivity and spatial efficiency are achieved. Improvement.
Patent Information
- Application Number
- CN202420608585.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The neutron sensitivity of traditional neutron detectors is low, and due to the volume and production process of the detector, it leads to insufficient neutron sensitivity in practical applications and the inability to effectively monitor the neutron flux rate.
By alternately connecting multiple neutron proportional counting tubes and connectors in series, a detection body and signal extraction structure is formed, a sealed fixed connection and signal connection between the neutron proportional counting tubes are realized, and the sensitivity of the neutron detector is improved.
It effectively improves the sensitivity of the neutron detector, reduces space occupation, reduces the mutual influence between each neutron proportional counting tube, and achieves a doubling of sensitivity.
Smart Images
Figure CN222280846U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radiation detection, in particular to a neutron detector. Background Art
[0002] Traditional neutron detectors mainly include boron-coated counter tubes, BF3 counter tubes and He-3 counter tubes. Limited by the production process and detection principle, the sensitive volume of a single detector is generally less than ф50*1200. Therefore, the detection cross-sectional area of a single detector is limited, and the neutron sensitivity of a single detector is also limited. Under extreme conditions, the neutron sensitivity of a single detector can reach 500cps / nv. In actual applications, due to the size limitations of the installation channel of the reactor's external detector and the outer moderator, the actual neutron detection sensitive volume size is smaller. At present, the neutron sensitivity of the reactor source range detector is generally 10 to 40cps / nv, and the neutron injection rate monitoring range can only reach about 0.01nv. Therefore, how to improve the neutron sensitivity of the detector has become an urgent problem to be solved. Utility Model Content
[0003] The purpose of the utility model is to provide a neutron detector to solve the problems existing in the above-mentioned prior art and to effectively improve the neutron sensitivity.
[0004] To achieve the above purpose, the utility model provides the following solutions:
[0005] The utility model provides a neutron detector, comprising a detection body and a signal lead-out structure, the detection body comprising at least two neutron proportional counting tubes and at least two connectors, each of the neutron proportional counting tubes and each of the connectors being alternately connected in series, the connector disposed between two adjacent neutron proportional counting tubes being able to seal and fix the two adjacent neutron proportional counting tubes and connect the signals, the connector disposed at the first end of the detection body being used to seal and fix the neutron proportional counting tube disposed at the first end of the detection body and the signal lead-out structure and connect the signals.
[0006] Preferably, the neutron proportional counter tube includes a tube shell, an anode wire and two lead-out components, both ends of the tube shell are open, the two lead-out components are sealed and fixedly arranged at the two ends of the tube shell, and can seal the openings at both ends of the tube shell, the anode wire is placed inside the tube shell, the two ends of the anode wire are respectively sealed and fixedly connected to the two lead-out components and signal connected, and the lead-out components are used to be fixedly connected to the connector and signal connected.
[0007] Preferably, the connector includes a connecting tube and a connecting wire, the connecting wire is placed in the connecting tube, and the connecting tube and the tube shell are alternately connected in series; the connecting tube placed between two adjacent tube shells can fixedly connect the two adjacent tube shells, and the connecting wire placed between the two adjacent tube shells can connect the anode wire signals in the two adjacent tube shells; the connecting tube placed at the first end of the detection body is used to fixedly connect the tube shell placed at the first end of the detection body with the signal lead-out structure, and the connecting wire placed at the first end of the detection body is used to connect the anode wire in the tube shell placed at the first end of the detection body with the signal lead-out structure signal.
[0008] Preferably, the signal lead-out structure includes a signal lead-out top cover and a signal line, a first mounting hole is opened on the signal lead-out top cover, the signal line can pass through the first mounting hole, and the outer wall of the signal line is sealed and fixedly connected to the inner wall of the first mounting hole; the signal lead-out top cover is sealed and fixedly connected to one end of the connecting tube disposed at the first end of the detection body, and the signal line is connected to the anode wire signal in the tube shell disposed at the first end of the detection body.
[0009] Preferably, the lead-out assembly includes a lead-out base, a ceramic-metal transition piece, an insulating ceramic piece and a lead-out tube, the lead-out base is sealingly fixedly arranged at one end of the tube shell, and can seal the opening of one end of the tube shell, a second mounting hole is opened on the lead-out base, the ceramic-metal transition piece is sealingly fixedly sleeved outside the insulating ceramic piece, the ceramic-metal transition piece is sealingly fixedly sleeved in the second mounting hole, the insulating ceramic piece is sealingly fixedly sleeved outside the lead-out tube, and the lead-out tube is sealingly fixedly connected to one end of the anode wire and signal-connected.
[0010] Preferably, an exhaust pipe is fixedly provided on one end of the neutron proportional counter tube, and the exhaust pipe can be communicated with the interior of the neutron proportional counter tube.
[0011] Compared with the prior art, the utility model has achieved the following technical effects:
[0012] The neutron detector provided by the utility model connects a plurality of neutron proportional counter tubes and a signal lead-out structure in series through a connector, has a simple structure, occupies a small space, has a small mutual influence between the neutron proportional counter tubes, and can effectively improve the neutron sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 A schematic diagram of a neutron detector provided by the utility model;
[0015] Figure 2 for Figure 1 Schematic diagram of the neutron proportional counter tube in;
[0016] Figure 3 for Figure 1 A schematic diagram of a connecting tube in FIG.
[0017] Figure 4 for Figure 1 Schematic diagram of the signal extraction structure in FIG.
[0018] Figure 5 for Figure 2 Schematic diagram of the lead-out components in;
[0019] Figure 6 for Figure 2 Schematic diagram of the tube shell in;
[0020] Figure 7 for Figure 2 Schematic diagram of the anode wire in;
[0021] Figure 8 for Figure 5 Schematic diagram of the lead-out base in;
[0022] Fig. 9 for Figure 5 Schematic diagram of a ceramic-metal transition piece;
[0023] Fig.10 for Figure 5 A schematic diagram of an insulating ceramic member;
[0024] Fig.11 for Figure 5 Schematic diagram of the outlet pipe in FIG.
[0025] Fig.12 for Figure 5 Schematic diagram of the exhaust pipe in;
[0026] Fig.13 for Figure 4 Schematic diagram of the signal leading out of the top cover;
[0027] Fig.14 for Figure 4 Schematic diagram of the signal lines in ;
[0028] In the figure: 1-neutron proportional counter tube, 11-lead-out assembly, 111-lead-out base, 112-ceramic metal transition piece, 113-insulating ceramic piece, 114-lead-out pipe, 115-exhaust pipe, 12-anode wire, 13-tube shell, 2-connecting tube, 3-connecting wire, 4-signal lead-out structure, 41-signal lead-out top cover, 42-signal wire. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] The purpose of the utility model is to provide a neutron detector to solve the problems existing in the above-mentioned prior art and to effectively improve the neutron sensitivity.
[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0032] like Figure 1-14 As shown, the utility model provides a neutron detector, including a detection body and a signal lead-out structure 4, the detection body includes at least two neutron proportional counter tubes 1 and at least two connectors, each neutron proportional counter tube 1 is alternately connected in series with each connector, the connector placed between two adjacent neutron proportional counter tubes 1 can seal and fix the two adjacent neutron proportional counter tubes 1 and connect the signals, the connector placed at the first end of the detection body is used to seal and fix the neutron proportional counter tube 1 placed at the first end of the detection body and connect the signals with the signal lead-out structure 4.
[0033] The neutron detector provided by the utility model connects several neutron proportional counter tubes 1 and signal lead-out structures 4 in series through a connector, has a simple structure, occupies a small space, has little mutual influence between the neutron proportional counter tubes 1, and can effectively improve the neutron sensitivity; it should be noted that the sensitivity of the neutron detector is positively correlated with the detection area of the neutron detector, therefore, the neutron detector provided by the utility model can achieve a doubling of the sensitivity, the more the number of neutron proportional counter tubes 1 connected in series is, the higher the sensitivity of the neutron detector provided by the utility model is, and the sizes and specifications of the neutron proportional counter tubes 1 connected in series in the neutron detector provided by the utility model can be the same or different.
[0034] Furthermore, the neutron proportional counter tube 1 includes a tube shell 13, an anode wire 12 and two lead-out components 11. The two ends of the tube shell 13 are open. The two lead-out components 11 are sealed and fixedly arranged at the two ends of the tube shell 13 and can block the openings at both ends of the tube shell 13. The anode wire 12 is placed inside the tube shell 13. The two ends of the anode wire 12 are sealed and fixedly connected to the two lead-out components 11 respectively and signal-connected. The lead-out components 11 are used to be fixedly connected to the connector and signal-connected. The structure is simple, which is convenient for realizing the double-end output signal of the neutron proportional counter tube 1. As a more preferred implementation of this embodiment, the anode wire 12 is made of metal material, preferably stainless steel wire or gold-plated tungsten wire.
[0035] Furthermore, the connector includes a connecting tube 2 and a connecting wire 3, the connecting wire 3 is placed in the connecting tube 2, and the connecting tube 2 and the tube shell 13 are alternately connected in series; the connecting tube 2 placed between two adjacent tube shells 13 can fix the two adjacent tube shells 13 in connection, the connecting wire 3 placed between two adjacent tube shells 13 can connect the anode wire 12 signals in the two adjacent tube shells 13, and the connecting wire 3 is fixedly connected to the anode wire 12 or the lead-out tube 114; the connecting tube 2 placed at the first end of the detection body is used to fix the tube shell 13 placed at the first end of the detection body with the signal lead-out structure 4, and the connecting wire 3 placed at the first end of the detection body is used to connect the anode wire 12 in the tube shell 13 placed at the first end of the detection body with the signal lead-out structure 4. The structure is simple and convenient for signal transmission.
[0036] Furthermore, the signal lead-out structure 4 includes a signal lead-out top cover 41 and a signal line 42. The signal lead-out top cover 41 is provided with a first mounting hole, and the signal line 42 can pass through the first mounting hole. The outer wall of the signal line 42 is sealed and fixedly connected to the inner wall of the first mounting hole; the signal lead-out top cover 41 is sealed and fixedly connected to one end of the connecting tube 2 disposed at the first end of the detection body, and the signal line 42 is connected to the anode wire 12 signal in the tube shell 13 disposed at the first end of the detection body. As a more preferred implementation manner of this embodiment, the shielding layer of the signal line 42 is crimped or welded to the signal lead-out top cover 41 to ensure the electrical continuity of the signal line 42, and the core wire of the signal line 42 is connected to the anode wire 12 or the lead-out tube 114 by soldering or crimping, wherein the signal line 42 can be a coaxial cable or a coaxial connector socket, and the rear end of the signal line 42 is converted to a required coaxial signal connector as needed, such as the HN series, LHV series, etc.
[0037] Furthermore, the lead-out assembly 11 includes a lead-out base 111, a ceramic-metal transition piece 112, an insulating ceramic piece 113, and a lead-out tube 114. The lead-out base 111 is sealed and fixedly arranged at one end of the tube shell 13, and can seal the opening of one end of the tube shell 13. A second mounting hole is opened on the lead-out base 111. The ceramic-metal transition piece 112 is sealed and fixedly sleeved outside the insulating ceramic piece 113. The ceramic-metal transition piece 112 is sealed and fixedly sleeved in the second mounting hole. The insulating ceramic piece 113 is sealed and fixedly sleeved outside the lead-out tube 114. The lead-out tube 114 and the lead-out tube 114 are connected to each other. One end of the anode wire 12 is sealed and fixedly connected and signal connected; as a more preferred implementation method of this embodiment, the two ends of the anode wire 12 are respectively welded to the lead-out tubes 114 of the two lead-out components 11 to ensure electrical continuity and airtightness, and the lead-out base 111, the ceramic metal transition piece 112, the insulating ceramic piece 113 and the lead-out tube 114 are welded by brazing to ensure that each matching position has high vacuum airtightness, and the two ends of the tube shell 13 are matched with the lead-out bases 111 of the two lead-out components 11 and sealed by welding.
[0038] Furthermore, an exhaust pipe 115 is fixedly provided on one end of the neutron proportional counter tube 1, and the exhaust pipe 115 can be connected to the interior of the neutron proportional counter tube 1. Only one exhaust pipe 115 is reserved for the entire neutron proportional counter tube 1 as an interface for the subsequent inflation process. After the interior of the neutron proportional counter tube 1 is evacuated, the corresponding working gas is filled in. Each neutron proportional counter tube 1 is independently evacuated and inflated, and then connected in series; the working gas is neutron sensitive gas such as He-3, BF3, etc.
[0039] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A neutron detector, characterized in that: It includes a detection body and a signal lead-out structure. The detection body includes at least two neutron proportional counting tubes and at least two connectors. The neutron proportional counting tubes and the connectors are alternately connected in series. The connector placed between two adjacent neutron proportional counting tubes can seal and fix the two adjacent neutron proportional counting tubes and connect them by signal. The connector placed at the first end of the detection body is used to seal and fix the neutron proportional counting tube placed at the first end of the detection body and the signal lead-out structure and connect them by signal.
2. The neutron detector according to claim 1, characterized in that: The neutron proportional counter tube includes a tube shell, an anode wire and two lead-out components. The two ends of the tube shell are open. The two lead-out components are sealed and fixedly arranged at the two ends of the tube shell and can seal the openings at the two ends of the tube shell. The anode wire is placed inside the tube shell. The two ends of the anode wire are respectively sealed and fixedly connected to the two lead-out components and signal-connected. The lead-out components are used to be fixedly connected to the connector and signal-connected.
3. The neutron detector according to claim 2, characterized in that: The connector includes a connecting tube and a connecting wire, the connecting wire is placed in the connecting tube, and the connecting tube and the tube shell are alternately connected in series; the connecting tube placed between two adjacent tube shells can fixedly connect the two adjacent tube shells, and the connecting wire placed between the two adjacent tube shells can connect the anode wire signals in the two adjacent tube shells; the connecting tube placed at the first end of the detection body is used to fixedly connect the tube shell placed at the first end of the detection body with the signal lead-out structure, and the connecting wire placed at the first end of the detection body is used to connect the anode wire in the tube shell placed at the first end of the detection body with the signal lead-out structure signal.
4. The neutron detector according to claim 3, characterized in that: The signal lead-out structure includes a signal lead-out top cover and a signal line. A first mounting hole is opened on the signal lead-out top cover, and the signal line can pass through the first mounting hole. The outer wall of the signal line is sealed and fixedly connected to the inner wall of the first mounting hole; the signal lead-out top cover is sealed and fixedly connected to one end of the connecting tube disposed at the first end of the detection body, and the signal line is connected to the anode wire signal in the tube shell disposed at the first end of the detection body.
5. The neutron detector according to claim 2, characterized in that: The lead-out assembly includes a lead-out base, a ceramic-metal transition piece, an insulating ceramic piece and a lead-out tube. The lead-out base is sealed and fixedly arranged at one end of the tube shell and can seal the opening of one end of the tube shell. A second mounting hole is opened on the lead-out base. The ceramic-metal transition piece is sealed and fixedly sleeved outside the insulating ceramic piece. The ceramic-metal transition piece is sealed and fixedly sleeved in the second mounting hole. The insulating ceramic piece is sealed and fixedly sleeved outside the lead-out tube. The lead-out tube is sealed and fixedly connected to one end of the anode wire and is signal-connected.
6. The neutron detector according to claim 1, characterized in that: An exhaust pipe is fixedly provided on one end of the neutron proportional counter tube, and the exhaust pipe can be communicated with the interior of the neutron proportional counter tube.