CN-224231980-U - Device for leading out cathode nuclear signal of proportional counter tube

Abstract

The utility model discloses a device for leading out a cathode nuclear signal of a proportional counter tube, and belongs to the technical field of nuclear detection. The utility model aims to solve the technical problem that the nuclear signal is led out of the anode of the prior proportional counter tube and is easy to generate signal distortion and influence measurement precision, and mainly adopts a mode of leading out the nuclear signal from the cathode of the proportional counter tube, and is matched with the structural design of a first signal connector, a second signal connector, a third signal connector and a metal shielding shell. The utility model can realize the complete output of the nuclear signal and the electromagnetic interference suppression, and improve the signal quality and the device stability.

Inventors

• YAN MINGYANG
• ZHANG YINHONG
• MA ZHONGJIAN
• WANG ZHENG
• ZHANG YUBAO
• MENG XIAOXIAO

Assignees

• 中国科学院高能物理研究所

Dates

Publication Date

20260512

Application Date

20250529

Claims (8)

1. 1. A device for direct-proportional counter tube cathode nuclear signal extraction, comprising: shield shell, proportional counter tube, first signal connector, second signal connector and third signal connector The proportional counter tube is arranged in the shielding shell and comprises an anode wire and a cathode shell, and neutron nuclear reaction sensitive gas is filled in the proportional counter tube; the first signal connector is arranged on the cover body of the shielding shell and is used for externally connecting an electronic unit; The second signal connector is arranged on the cover body of the shielding shell and is used for being externally connected with a high-voltage power supply module; The third signal connector is arranged between the proportional counter tube and the first signal connector and the second signal connector, and comprises a signal wire and a shielding net, one end of the signal wire is connected with the anode wire, the other end of the signal wire is connected with the signal wire of the second signal connector, one end of the shielding net is connected with the cathode shell, and the other end of the shielding net is connected with the signal wire of the first signal connector.
2. 2. The device for leading out cathode nuclear signals of proportional counter tubes according to claim 1, wherein the shielding shell is of a cylindrical structure and is made of aluminum.
3. 3. The device for leading out cathode nuclear signals of proportional counter tubes according to claim 1, wherein the cover body of the shielding shell is in buckling connection with the main body of the shielding shell.
4. 4. A counter tube cathode nuclear signal extraction apparatus as in claim 1 wherein said first signal connector is an SMA type connector.
5. 5. A counter tube cathode core signal extraction apparatus as in claim 1 wherein said second signal connection is an MHV connection.
6. 6. A counter tube cathode core signal extraction apparatus as claimed in claim 1 wherein said third signal connection is an MHV or SHV connection.
7. 7. The apparatus of claim 1, wherein the neutron nuclear reaction sensitive gas charged in the proportional counter is BF 3 or 3 He.
8. 8. The device for leading out cathode nuclear signals of proportional counter tubes according to claim 1, wherein the third signal connector is fixed with the proportional counter tubes in a spiral button connection mode.

Description

Device for leading out cathode nuclear signal of proportional counter tube Technical Field The utility model relates to a device for leading out a cathode nuclear signal of a proportional counter tube, and belongs to the technical field of nuclear detection. Background The proportional counter tube is a gas detector, and the inside of the proportional counter tube can be filled with sensitive gases of different types, and is commonly used for detecting neutron rays. In the working state, the proportional counter tube forms a space electric field in the tube by externally applying positive high voltage, the outer wall of the tube body is used as a cathode of the electric field, and filaments pulled inside are used as an anode of the electric field. In the existing part proportional counter tube (see Jiang Bo, wu Wenchao, a research on anti-interference boron-coated proportional counter tube, instrument and meter users, 2020,27 (03): 61-64; yang Daoan, liu Shuangtong, a research on spherical 3 He proportional counter tube, nuclear power and detection technology, 2014,34 (04): 521-525), an anode wire is not only used for high-voltage feed-in, but also used as a leading-out end of a nuclear signal. To prevent high voltages from affecting the back-end electronics, a dc blocking capacitor is typically provided at the front-end of the electronics. However, the scheme based on the anode leading-out nuclear signal has the defect that the original nuclear signal is distorted when passing through the blocking capacitor, so that the original time characteristic and amplitude characteristic of the original nuclear signal are changed. Disclosure of utility model The utility model aims to provide a device for leading out a cathode nuclear signal of a proportional counter tube, which is used for solving the problems that signal distortion is led in by a blocking capacitor and the time characteristic and the amplitude characteristic of the nuclear signal are influenced in the existing anode leading-out mode. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a device for cathode nuclear signal extraction of proportional counter tubes, comprising: shield shell, proportional counter tube, first signal connector, second signal connector and third signal connector The proportional counter tube is arranged in the shielding shell and comprises an anode wire and a cathode shell, and neutron nuclear reaction sensitive gas is filled in the proportional counter tube; the first signal connector is arranged on the cover body of the shielding shell and is used for externally connecting an electronic unit; The second signal connector is arranged on the cover body of the shielding shell and is used for being externally connected with a high-voltage power supply module; The third signal connector is arranged between the proportional counter tube and the first signal connector and the second signal connector, and comprises a signal wire and a shielding net, one end of the signal wire is connected with the anode wire, the other end of the signal wire is connected with the signal wire of the second signal connector, one end of the shielding net is connected with the cathode shell, and the other end of the shielding net is connected with the signal wire of the first signal connector. Further, the shielding shell is of a cylindrical structure, and aluminum is selected. Further, the cover body of the shielding shell is in buckling connection with the shielding shell main body. Further, the first signal connector is an SMA-type connector. Further, the second signal connector is an MHV connector. Further, the third signal linker is an MHV or SHV linker. Further, the neutron nuclear reaction sensitive gas filled in the proportional counter tube is BF 3 or 3 He. Further, the third signal connector is fixed with the proportional counter tube in a spiral button connection mode. The beneficial effects obtained by the utility model are as follows: 1. According to the utility model, the nuclear signal is led out from the cathode of the proportional counting tube, so that the problem of signal distortion caused by the blocking capacitor in the traditional anode leading-out mode is avoided, and the original time characteristic and amplitude characteristic of the nuclear signal can be effectively reserved. 2. According to the utility model, the metal shielding shell is arranged outside the proportional counting tube, so that the suppression capability of the device to external electromagnetic interference can be enhanced, and the stability of signal transmission and the reliability of device operation are improved. 3. According to the utility model, through the structural design and arrangement of the first, second and third signal connectors, the effective isolation of the high-voltage power supply channel and the signal output channel is realized, the assembly structure is compact, and the modular integ