用于等离子体诊断的空间分辨真空紫外和软X射线光谱仪的校准。

Calibration of space-resolving VUV and soft X-ray spectrographs for plasma diagnostics.

作者信息

Yoshikawa M, Yamaguchi N, Aota T, Ikeda K, Okamoto Y, Yatsu K, Tamano T

机构信息

Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305, Japan.

出版信息

J Synchrotron Radiat. 1998 May 1;5(Pt 3):762-5. doi: 10.1107/S090904959701604X.

DOI:10.1107/S090904959701604X

PMID:15263645

Abstract

Vacuum ultraviolet (VUV) and soft X-ray measurements are important means of diagnosing impurities in magnetically confined plasmas used in fusion research. Recently, space- and time-resolving flat-field VUV (150-1050 A) and soft X-ray (20-350 A) spectrographs have been constructed by using aberration-corrected concave gratings with varied-spacing grooves which give a wide simultaneous spectral coverage on a microchannel-plate intensified detector. Calibration experiments have been performed at beamlines 11A and 11C at the Photon Factory of the High Energy Accelerator Research Organization. The relative efficiency of the VUV spectrograph has been measured for P-polarization geometry in the spectrograph. In the soft X-ray spectrograph, efficiencies have been obtained for several different points of irradiation on the grating along the groove direction and for two (S and P) polarization geometries.

摘要

真空紫外（VUV）和软X射线测量是诊断聚变研究中磁约束等离子体杂质的重要手段。最近，通过使用具有变间距刻槽的像差校正凹面光栅，构建了空间和时间分辨的平场VUV（150 - 1050 Å）和软X射线（20 - 350 Å）光谱仪，这些刻槽在微通道板增强探测器上提供了宽同时光谱覆盖范围。校准实验已在高能加速器研究组织光子工厂的11A和11C光束线上进行。已测量了VUV光谱仪在光谱仪中P偏振几何条件下的相对效率。在软X射线光谱仪中，已获得了沿刻槽方向在光栅上几个不同照射点以及两种（S和P）偏振几何条件下的效率。