A new toroidal x-ray crystal spectrometer for the diagnosis of high energy density plasmas at the National Ignition Facility

被引：14

作者：

Bitter, M. ^{[1
]}

Hill, K. W. ^{[1
]}

Gao, Lan ^{[1
]}

Kraus, B. F. ^{[1
]}

Efthimion, P. C. ^{[1
]}

Delgado-Aparicio, L. ^{[1
]}

Pablant, N. ^{[1
]}

Stratton, B. ^{[1
]}

Schneider, M. ^{[2
]}

Coppari, F. ^{[2
]}

Kauffman, R. ^{[2
]}

MacPhee, A. G. ^{[2
]}

Ping, Y. ^{[2
]}

Thorn, D. ^{[2
]}

机构：

[1] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2018年 / 89卷 / 10期

关键词：

Spectrometers - Ignition - Spectral resolution;

D O I：

10.1063/1.5036806

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The here-described spectrometer was developed for the extended x-ray absorption fine structure spectroscopy of high-density plasmas at the National Ignition Facility. It employs as the Bragg reflecting element a new type of toroidally bent crystal with a constant and very large major radius R and a much smaller, locally varying, minor radius r. The focusing properties of this crystal and the experimental arrangement of the source and detector make it possible to (a) fulfill the conditions for a perfect imaging of an ideal point source for each wavelength, (b) obtain a high photon throughput, (c) obtain a high spectral resolution by eliminating the effects of source-size broadening, and (d) obtain a one-dimensional spatial resolution with a high magnification perpendicular to the main dispersion plane. Published by AIP Publishing.

引用

页数：5

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