激光等离子体装置上（选定的）平面布拉格晶体光谱仪的X射线光谱仪通量模型。

X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities.

作者信息

Thorn D B, Coppari F, Döppner T, MacDonald M J, Regan S P, Schneider M B

机构信息

Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.

出版信息

Rev Sci Instrum. 2018 Oct;89(10):10F119. doi: 10.1063/1.5039423.

DOI:10.1063/1.5039423

PMID:30399669

Abstract

At large laser faculties, such as OMEGA and the National Ignition Facility (NIF), x-ray spectrometers are provided by the facility to diagnose plasma conditions or monitor backlighters. Often the calibration of these spectrometers is unknown or out of date. As a remedy to this situation, we present a simple ray trace method to calibrate flat crystal spectrometers using only basic information regarding the optical design of the spectrometer. This model is then used to output photometric throughput estimates, dispersion, solid angle, and spectral resolution estimates. This model is applied to the mono angle crystal spectrometer and Super Snout I at the NIF and the X-Ray Spectrometer at the OMEGA laser facility.

摘要

在诸如欧米伽（OMEGA）和国家点火装置（NIF）等大型激光机构中，这些机构会提供X射线光谱仪来诊断等离子体状态或监测背光源。这些光谱仪的校准情况往往未知或已过时。针对这种情况，我们提出一种简单的光线追踪方法，仅使用关于光谱仪光学设计的基本信息来校准平面晶体光谱仪。然后使用该模型输出光度通量估计值、色散、立体角和光谱分辨率估计值。该模型应用于NIF的单角度晶体光谱仪和超级鼻锥I以及欧米伽激光装置的X射线光谱仪。