tissue equivalent proportional counter

Abstract

The invention relates to a nuclear radiation measurement device. In order to solve the problems of conventional tissue equivalent proportional counters, such as low comprehensive performance and incapability of simultaneously taking the requirements on the uniformity of the electric field in a sensitive region and as high isotropy of response in a radiation field as possible into consideration, the invention provides a tissue equivalent proportional counter, which comprises a chamber, an anodal wire, an aluminium shell, a cathodal outlet, a first insulator, a second insulator and a metal sleeve; the cavity part of the chamber is shaped like a cylinder, the diameter of which is equal to height; and the anodal wire is located on the axis of the cavity part of the chamber, and is provided with a spring for straightening the anodal wire. The comprehensive performance of the tissue equivalent proportional counter is good, a uniform electric field can be generated in the sensitive region, the response in the radiation field is close to isotropy, the working performance is good, the efficiency of detection is high, the tissue equivalent proportional counter provides an electrostatic screening measure under the premise of meeting the requirement of tissue equivalence, the measurement result is accurate, moreover, the machining process is simple, and long-time application can be guaranteed.

Description

technical field [0001] The invention relates to a nuclear radiation measuring device, in particular to a tissue equivalent proportional counter. Background technique [0002] Microdosimetry aims to study the law of energy deposition of ionizing radiation in microscopic space (cell and molecular level), and further study to explore the biological effects of radiation. Experiments are required to simulate human tissues at the cellular scale, even smaller than cells , for example: cell nucleus (approximately 2 μm in diameter). The advantage of the proportional counter is that the ionized charge generated by the ionized particles is multiplied in the electric field, which makes the output signal amplified for direct measurement, and the amplitude of the output electrical signal is proportional to the initial ionization quantity, that is, it is proportional to the energy deposited in a single event. . When used for microdosimetry measurement, the wall material of the proportion...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the comprehensive performance of the existing tissue equivalent proportional counter is not high, the electric field in the sensitive area should be uniform and the response in the radiation field should be as isotropic as possible. Problems such as the influence of result accuracy, the present invention provides a kind of tissue equivalent proportional counter, specifically as follows:

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