應(yīng)用螺旋型分壓器的硅漂移室探測器電學(xué)特性仿真
[Abstract]:The silicon drift chamber detector, based on the principle of lateral depletion, was first proposed by two scientists, E.Gatti and P.Rehak, in 1983. First, it was proposed as a two-dimensional position sensitive detector. Later, it was applied to high resolution X-ray spectroscopy, and it was found that the position resolution and energy sensitivity of this kind of detector were very high. Therefore, it gradually replaced the traditional Si-PIN detector and was widely used in X-ray spectrometer. In aerospace, space exploration applications are becoming more and more important, and more achievements have been made. The silicon drift chamber detector, based on planar technology, because there is only one anode in the center of the upper surface of the detector, and the area of the anode can be very small, the sensitive region of the whole detector is relatively large, the capacitance is small, and the sensitivity is high. Good energy resolution, and two-dimensional position resolution. Because of these characteristics, since they were proposed, many scientists have been involved in the research of silicon drift chamber detectors. Then the silicon drift detector formed two main branches: the linear geometry silicon drift chamber detector and the circular silicon drift chamber detector. The silicon drift chamber detector with spiral voltage divider in this paper belongs to the circular silicon drift chamber detector. According to the shape, the silicon drift chamber detector with spiral voltage divider can be divided into four prisms, six prisms and cylinders. In this paper, a four-prism silicon drift chamber detector with spiral voltage divider is used as the main research object. The electrical characteristics of the detector and the traditional spiral silicon drift chamber detector are simulated by the semiconductor device simulation software Sentaurus TCAD. By comparing their electrical properties, it is concluded that the traditional spiral silicon drift chamber can not be made into a large array on the basis of good performance. What we do is to simulate the silicon drift chamber detector with spiral voltage divider. Such a structure was proposed in 2014, mainly for theoretical research, and has not been simulated in 3D, so our work is for the first time. In this paper, we mainly simulate its potential distribution, electric field distribution and electron concentration distribution. Through these electrical properties, we can know that the detector will form an electron drift orbit in its interior. Using the heavy ion incident model, we also dynamically see the electron drift inside the detector.
【學(xué)位授予單位】:湘潭大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TN303
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