Multifilament proportional counter

Abstract

The invention relates to a multifilament proportional counter. The multifilament proportional counter is characterized in that an upper cover plate is disposed on a pedestal in a covered manner; a tray support is disposed on the upper part of the pedestal, and is combined with the pedestal; a tray is disposed on the upper part of the tray support, and is connected with the tray support; a cathode bottom plate is fixedly disposed on the upper cover plate; a connecting rod is fixedly disposed on the lower part of the cathode bottom plate; an anode filament rack is disposed on the lower part of the cathode bottom plate, and is hung on the connecting rod; and anode filaments are connected with the anode filament rack by springs. The multifilament proportional counter is advantageous in that the influence of the distance between the radioactive source and the anode filaments on the emissivity of the radioactive source surface and the uncertainty evaluation can be researched quantitatively, and the influence of the air pressure working condition on the beta ray detection can be researched quantitatively; the electric field distribution is stable, and can be used to keep the tray used for carrying the large-area source stable and unshaken, and by adopting the roller-type bearing design, the movable operation of the source tray can be realized.

Description

technical field [0001] The invention relates to the technical field of ionizing radiation measurement and measurement, in particular to a multi-wire proportional counter. Background technique [0002] A proportional counter is a particle detector that uses gas as the working medium, and the output pulse amplitude is proportional to the number of initial ionized ion pairs. It can be used to count the number of particles and determine the energy deposited by the incident particles according to the pulse height of the output signal. A multi-filament proportional counter is a proportional counter with a multi-filament structure, consisting of a large number of parallel filaments, all of which are in a plane between two cathode planes a few centimeters apart, and the diameter of the anode thin wire is about tens Microns, with a pitch of about one or several millimeters. Each filament behaves like a proportional counter tube with spatial precision of one millimeter or less. Each...

AI Technical Summary

Problems solved by technology

[0004] (1) It is impossible to quantitatively study the influence of "radiation source-anode wire distance" on the surface particle emission rate;

[0005] (2) It is impossible to quantitatively study the influence of air pressure working conditions on β-ray detection;

[0006] (3) During long-term use, since the plane of the anode wire is parallel to the horizontal plane, the anode wire will change the electric field distribution in the chamber under the influence of gravity, thereby affecting the accuracy of the emissivity value reproduction and long-term stability. to adversely affect;

[0007] (4) The tray carrying the large-area source is unstable and easy to shake, which leads to measurement errors

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