Wide-range gamma dose rate measurement ionization chamber

A gamma dose rate and ionization chamber technology, which is applied in the field of nuclear radiation detection, can solve the problems of increasing the size and weight of the equipment, which is not conducive to portability, and increases the cost, and achieves the reduction of size, weight and equipment cost, and the equipment is simple and reliable. The effect of simple system structure

Pending Publication Date: 2022-02-08
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Description
  • Claims
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Problems solved by technology

While this method increases the cost, it also increases the volume and weight of the equipment, which is not conducive to portability.

Method used

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  • Wide-range gamma dose rate measurement ionization chamber
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Embodiment Construction

[0017] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0018] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected ...

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Abstract

The invention relates to the technical field of nuclear radiation detection, and provides a wide-range gamma dose rate measurement ionization chamber, which comprises an ionization chamber, a collector and two high-voltage electrodes are arranged in the ionization chamber, working gas is filled between the two high-voltage electrodes and the collector, and the first high-voltage electrode and the second high-voltage electrode respectively correspond to a sensitive volume v1 and a sensitive volume v2. During low-range measurement, the two high-voltage poles provide high voltage at the same time, the device has a large sensitive volume so as to be suitable for low-range measurement, and during high-range measurement, in order to avoid electronic saturation, only one high-voltage pole is provided with high voltage, and at the moment, the sensitive volume is small, so that the device is suitable for high-range measurement. According to the ionization chamber, only one pre-amplification circuit is arranged, only one ionization chamber is needed, the reliability of equipment is improved, the structure of the equipment is simplified, and the size, the weight and the cost of the equipment are reduced.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a gamma dose rate measuring ionization chamber with wide range characteristics. Background technique [0002] In gamma dose rate measurement, equipment is sometimes required to have an extremely wide measurement range. Under environmental background conditions, the gamma dose rate is generally on the order of 1E-7Gy / h, but in special cases, such as when a nuclear accident occurs, the gamma dose rate can reach more than 1Gy / h. At this time, it is necessary for the measurement ionization chamber to have a wide range to cover the measurement range. [0003] Generally, the ionization chamber improves the measurement range through two methods: one is to realize the gear shifting of the rear-end preamplifier circuit, and the measurement range reaches more than 7 orders of magnitude by switching multiple gears with different magnifications, but this method increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/185G01T7/00
CPCG01T1/185G01T7/00
Inventor 闫洋洋蔺常勇施礼王强陈祥磊王轶刘单
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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