Free air detection array device with equal-interval co-high-pressure ultrathin-wall parallel plates

Abstract

The invention relates to a free air detection array device with equal-interval co-high-pressure ultrathin-wall parallel plates, comprising a plurality of sets of detectors. All the detectors are placed in a high-pressure cabinet; each set of detector comprises a high-pressure pole plate and an insulating plate; a collecting pole plate of each detector is fixed on the insulating plate; and the collecting pole plates of every two adjacent detectors are separated in an insulating way through a metal plate. In the invention, the complete equal interval among the detectors is ensured; the high-pressure cabinet can be aerated through an air compensating valve when measuring sensitivity needs to be enhanced; because all the detectors are positioned at same high-pressure environments, a small amount of air leakage of the high-pressure cabinet has same influence on all the detectors without any influence on the measurement consistency of the detectors, thus the requirements for sealing of the high-pressure cabinet is greatly reduced by compensating the air when air pressure is obviously reduced; a sealing washer and bolts can be adopted for seal without adopting welded seal; and the free air detection array device has the advantages of simple structure, low cost and easy maintenance.

Description

technical field [0001] The invention relates to a common high-voltage extremely thin-walled parallel plate free-air detector array device in the field of ionizing radiation detection technology, in particular to a common high-voltage extremely thin-walled parallel-plate free-air detector array device that is truly equidistant linearly arranged. Background technique [0002] The array detection device can be used for the measurement of the dose field distribution parameters of the accelerator. With the measurement circuit and analysis software, it can also be used for the imaging of the accelerator, especially for the transmission digital imaging system for ionizing radiation of large objects, the array detector is generally used to realize scanning. Measurement. [0003] Chinese patent No. 93102781.4 discloses an existing "gas ionization type high-energy X, gamma radiation imaging array detection device". The detection device is composed of dozens of detector modules, pleas...

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned array detection device can have a better scanning measurement function, it is found that there are still some shortcomings in its structure during actual use. Because the best use effect cannot be achieved, the shortcomings can be summarized as follows:

[0005] 1. Please refer to figure 2 , image 3 As shown, the existing array detection device usually packs an array of 24 detectors in a small airtight cabinet, and the thickness of the high-voltage cabinet is about 2 centimeters due to the need to add gas of about 50 atmospheres. This makes it impossible for each group of detectors to be distributed equidistantly, and there is a detection blind spot at the connection of the two groups of detectors, and image misalignment occurs;

[0006] 2. If the air leakage rate of different high-voltage cabinets is inconsistent, it will affect the consistency of the detector. Therefore, the requirements for the sealing process of the detector are very strict;

[0007] 3. Since the electrodes are in the middle of the detector, they are easily affected by up and down vibrations

[0008] It can be seen that the above-mentioned existing array detection device obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

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