瞬态光学渡越辐射测量系统的设计
Design of instantaneous measurement system based on optical transition radiation
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摘要: 针对在神龙一号上进行电子束瞬态发射度的测量要求，建立了一套利用光学渡越辐射原理进行电子束发射度测量的瞬态测量系统，该测量系统瞬态测量时间最快约10 ns，并获得了神龙一号发射的脉冲电子束的束斑及发散角，典型值分别为约9 mm和10.5 mrad，实现了电子束发散角和束斑的同时测量，为在神龙一号上进行的时间分辨测量系统的研究奠定了基础。Abstract: An optical transition radiation (OTR)-based measurement system has been designed to obtain the instantaneous beam divergence and spot size of Dragon-Ⅰ linear induction accelerator (LIA) simultaneously. It can achieve instantaneous measurement within about 10 ns, and provides an on-line instantaneous beam diagnostic method for a 18.5 MeV, 2 kA, 90 ns electron pulse. The typical results of beam spot and beam divergence are about 9 mm and 10.5 mrad. This system lays a foundation for the study of time-resolved beam diagnostic technique which will be adopted in Dragon-Ⅰ LIA.
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