Method and device for measuring proton displacement damage dose by using quantum dot semiconductor device

Abstract

The invention discloses a method and device for measuring a proton displacement damage dose by using a quantum dot semiconductor device. The quantum dot semiconductor device made of a InAs / GaAs material serves as a detector. Research shows that after the type of detector is subjected to proton irradiation, the steady-state output performance is in a response relation of being linearly reduced along with the increase of the proton radiation dose, so that proton displacement damage detection is carried out by utilizing the characteristics of the detector. Compared with the mode that the displacement damage dose is obtained through total ionization dose, the influence of a common test simulation source non-ideal monoenergetic and secondary radiation is overcome. Compared with an existing modethat displacement damage detection is achieved through a LED, a testing system is simple and practical, and the error caused by optical coupling is eliminated.

Description

technical field [0001] The invention belongs to the technical field of radiation measurement, and in particular relates to a method and a device for measuring proton displacement damage dose by using a quantum dot semiconductor device. Background technique [0002] Satellite laser communication technology is an effective means to solve the data rate bottleneck of high-speed satellite communication, and has been widely valued by countries all over the world. Japan, Europe, the United States, China, etc. have successively carried out space experiments, and achieved success in inter-satellite and satellite-to-earth link laser communication experiments. Now countries have put the practicality and miniaturization of satellite laser communication technology as the research focus. [0003] The satellite laser communication terminal works in the space radiation environment, the space radiation effect, especially the displacement damage effect will lead to a serious decline in laser...

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Problems solved by technology

[0005] There are two main methods for measuring the displacement damage dose. The first one is derived from the total ionized dose or the particle fluence measured by the Faraday cylinder, and then the displacement damage dose is calculated from the particle fluence. The disadvantage of this method is that the ground radiation The simulation sources are not strictly monoenergetic, and there is a large error in the process of converting the total ionization dose into the fluence, and the secondary radiation at the sample point will cause uncertain interference to the total ionization dose

The second is to directly detect the displacement damage dose. At present, the LED is mainly used as the detector to detect the displacement damage dose. The disadvantage of using the LED to detect the displacement damage is that the error caused by the optical coupling during the test is relatively large, and the test complexity is high.

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