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神龙二号是一台三脉冲强流脉冲电子束直线感应加速器,就其多脉冲的电子束束参数的测量而言,基本要求是单个脉冲可分辨,进一步的要求是脉冲内时间可分辨。基于光学渡越辐射原理及瞬态发射度测量系统原理,发展了一种束斑与发散角可以分开测量的光学布局结构,结合多台高速分幅相机,成功研制了一套完整的多脉冲电子束束参数的测量系统,其特点是灵活的组合测量方式,全面满足了神龙二号复杂艰难的调试及参数测量工作要求。测量系统最高时间分辨测量能力达到约2ns的水平,单个脉冲可以获得至少8个时间分辨的束参数测量结果。
Shenlong II is a three-pulse pulsed electron beam linear induction accelerator. For the measurement of multi-pulse electron beam parameters, the basic requirement is that a single pulse be resolvable. A further requirement is that the pulse time be distinguishable. Based on the principle of optical transition radiation and the principle of transient emissivity measurement system, an optical layout structure which can measure beam spot and divergence angle separately is developed. Combining with several high speed framing cameras, a complete set of multi-pulse electronic Beam parameters of the measurement system, which is characterized by a flexible combination of measurement methods, fully meet the complex and difficult Shenlong II debugging and parameter measurement requirements. The maximum time-resolved measurement capability of the measurement system reaches about 2 ns, and a single pulse gives at least 8 time-resolved beam parameter measurements.