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等离子体诊断由于其持续时间为皮秒量级,故要求在X射线条纹相机单次测量过程中尽可能多地获取信息,其中一个有效的途径是增大其成像面积。为了解决大物面成像质量问题,基于二电极同心球静电聚焦系统,设计了一种大物面X射线条纹管。通过蒙特卡罗法仿真电子发射和龙格-库塔法追踪电子轨迹,计算得到该管型阴极有效工作面积直径为50mm,中心静态极限空间分辨率可达50lp/mm,边沿静态极限空间分辨率31lp/mm,放大倍率为1.1,整管长度600mm,管径100mm。结果显示,该条纹管满足大物面成像的要求,可用于超快事件过程中大量信息的获取。
Plasma diagnostics, due to their picosecond duration, require as much information as possible during a single measurement of an X-ray streak camera, an effective way to increase the imaging area. In order to solve the problem of large object imaging quality, based on two-electrode concentric spherical electrostatic focusing system, a large-surface X-ray striped tube was designed. The electron trajectory was tracked by the Monte-Carlo method and the Runge-Kutta method was used to track the electron trajectory. The calculated effective working area of the tubular cathode was 50mm, the central static limit spatial resolution was 50lp / mm, the edge static limit spatial resolution 31lp / mm, magnification of 1.1, the entire length of 600mm, diameter 100mm. The results show that the streak tube meets the requirements of large-area imaging and can be used to acquire a large amount of information during the ultra-fast event.