Holder J P, Izumi N, Beach M, Ayers M J, Bell P, Schneider M, Bradley D K, Kohut T, Ehrlich R, Cohen M, Ramirez R, Thorn D
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Rev Sci Instrum. 2018 Oct;89(10):10F123. doi: 10.1063/1.5039363.
At the National Ignition Facility (NIF), storage phosphor image plates (IP) are used extensively for recording x-rays, charged particles, and neutrons. For x-ray imaging and spectroscopy, absolute and relative calibrations are important for extracting plasma information from the diagnostics. We use Fuji MS, SR, and TR image plates that have been cut to fit custom diagnostic envelopes. The image plates are scanned on a General Electric FLA 7000 IP flying spot scanner. Calibrations for sensitivity, spatial scale, and temperature dependent fade are applied. During a set of recent calibrations, we noticed large shifts in the absolute calibration of the image plate system. The possible source of these shifts is discussed. We discuss scanner stability and a method for calibration. We discuss the fade and temperature effects of the image plates and how this correction is applied within the NIF environment. We also compare our NIF GE FLA 7000 IP scanner with a new General Electric Amersham Typhoon IP scanner.
在国家点火装置（NIF）中，存储磷光成像板（IP）被广泛用于记录X射线、带电粒子和中子。对于X射线成像和光谱学，绝对校准和相对校准对于从诊断中提取等离子体信息非常重要。我们使用已切割以适配定制诊断封套的富士MS、SR和TR成像板。这些成像板在通用电气FLA 7000 IP飞点扫描仪上进行扫描。进行了灵敏度、空间尺度和温度依赖性褪色的校准。在最近的一组校准过程中，我们注意到成像板系统的绝对校准出现了大幅偏移。讨论了这些偏移的可能来源。我们讨论了扫描仪的稳定性以及一种校准方法。我们讨论了成像板的褪色和温度影响以及如何在NIF环境中应用这种校正。我们还将我们的NIF通用电气FLA 7000 IP扫描仪与新型通用电气阿美仙台风IP扫描仪进行了比较。
