利用光学渡越辐射进行强流束诊断
Research of optical transition radiation on intense electron-beam diagnostics
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摘要: 描述了光学渡越辐射用于束流诊断的理论依据，介绍了利用光学渡越辐射对18MeV，2.7kA的强流脉冲电子束进行诊断的实验方案。在解决了在强流束测量中强背景干扰等问题后，获得了光学渡越辐射的特征图案，据此测量了强流脉冲束的剖面、能量、发散角和发射度。初步的实验结果表明，光学渡越辐射方法是强流束诊断的一种有效手段。Abstract: In this paper, the basic theory of optical transition radiation(OTR) is described. The schemes of experiments on an electron beam of 18MeV, 2.7kA using OTR are presented. In the diagnostics of such an intense beam, some difficulties including strong visible light and Xray background interference and so on, have been solved. The characteristic pattern of OTR is obtained. With OTR method, the beam profile, energy, divergence and emittence were measured. The preliminary results show that OTR method is an effective way for intense beam diagnostics.
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