Proton fluence rate measuring device and system

Abstract

The present disclosure provides a proton fluence measurement device and system, wherein the device includes an absorption structure and a compensation structure, the absorption structure is used to absorb the incident proton beam; the compensation structure is arranged before the absorption structure along the incident direction of the proton beam , to provide secondary electron emission compensation for the absorption structure in the process of measuring the fluence rate of the proton beam; wherein, the materials used for the absorption structure and the compensation structure are both graphite. Through the proton fluence rate measuring device of the embodiment of the present disclosure, secondary electron emission compensation can be used to avoid the use of high-voltage power supply, and the accuracy of measurement can be ensured while being convenient to operate. At the same time, since both the compensation structure and the absorption structure are made of graphite, the device can realize the measurement of the proton fluence rate in the atmosphere, and at the same time greatly reduce the residual gamma radiation dose and reduce the ionizing radiation during the detection process. Ensure the safety of test personnel.

Description

technical field [0001] The present disclosure relates to the technical field of proton measurement, in particular to a proton fluence measurement device and system. Background technique [0002] The range of proton fluence rate required for medium-energy proton (tens of MeV to hundreds of MeV) single event effect irradiation experiments on aerospace devices is generally 10 6 ~10 8 cm -2 ·s -1 , the proton fluence rate test for this range generally needs to be carried out with a Faraday cup. In the prior art, the Faraday cage for measuring 100 MeV protons generally adopts a cylindrical structure of copper material as the proton collection cylinder, the diameter of the transmission collimation hole is generally 0.5cm to 2cm, and the thickness of the absorber is 2cm, so as to ensure that the 100MeV protons can Completely blocked in the absorber. Wherein, when the entire Faraday cage is placed in the vacuum pipeline, the measurement error caused by air ionization in the col...

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Problems solved by technology

[0003] Although the proton fluence rate measurement of the above-mentioned type of Faraday cup is relatively accurate, there are often the following problems in practical applications: during the 100 MeV proton irradiation process, a large amount of gamma radiation is generated due to the nuclear reaction between the proton and the material copper, and the gamma The radiation dose of horses is relatively high, generally tens to hundreds of μSv / h

However, in the actual test, manpower replacement of structural components such as irradiation devices is basically required after waiting for a few hours. Obviously, this will cause a great dose safety hazard for subsequent test personnel

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