Unipolar nuclear radiation detector and pre-amplification circuit thereof

Abstract

The invention discloses a unipolar nuclear radiation detector and a pre-amplification circuit thereof. The pre-amplification circuit of the unipolar nuclear radiation detector comprises a high-voltage bias voltage source which acts on the unipolar nuclear radiation detector; a first filter circuit which is connected with the unipolar nuclear radiation detector and is used for filtering current pulse signals generated by the unipolar nuclear radiation detector under the action of a bias voltage of the bias voltage source; an amplifying circuit connected with the first filter circuit and used for amplifying the filtered current pulse signals; and a low-frequency feedback circuit which is connected with the amplifying circuit and is used for providing a feedback loop for a low-frequency signal in the current pulse signals. According to the pre-amplification circuit provided by the invention, the anti-noise level of the system can be improved, and the resolution is improved.

Description

technical field [0001] The application belongs to the technical field of nuclear radiation electronics, and relates to a unipolar nuclear radiation detector and a preamplifier circuit thereof. Background technique [0002] A kind of energy emitted by radioactive substances in the form of waves or particles is called nuclear radiation. Nuclear radiation mainly includes three types of rays: α, β, and γ. It will cause harm to living things. Due to its high penetrability, nuclear radiation will bring certain harm and influence to the survival of all living things around the nuclear reaction experiment or nuclear magnetic energy weapon explosion site, especially to the life safety of living things. , the natural living environment and the impact of panic in human society are extremely prominent [1] . Therefore, while we use nuclear energy, we must strengthen nuclear radiation environmental detection and monitoring. Therefore, it is very important to improve the detection capab...

AI Technical Summary

Problems solved by technology

Due to the good carrier transport characteristics of Si and Ge materials (high carrier mobility lifetime product), the detectors made of this material have high energy resolution, but the atomic coefficients of Si and Ge are low, which is not suitable for high energy The ability to stop rays is poor and the resistivity is low, so the detection efficiency of silicon and germanium detectors is low, and high-energy γ-rays cannot be detected. At the same time, silicon and germanium need to be stored in a low temperature environment, and silicon and germanium detectors are sensitive to Si , The purity of Ge is very high, thus increasing the production cost

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