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Title: Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment

Abstract

This recently developed diagnostic was designed to allow for time-gated spectroscopic study of the EUV radiation (4 nm < {lambda} < 15 nm) present during harsh wire array z-pinch implosions. The spectrometer utilizes a 25 {mu}m slit, an array of 3 spherical blazed gratings at grazing incidence, and a microchannel plate (MCP) detector placed in an off-Rowland position. Each grating is positioned such that its diffracted radiation is cast over two of the six total independently timed frames of the MCP. The off-Rowland configuration allows for a much greater spectral density on the imaging plate but only focuses at one wavelength per grating. The focal wavelengths are chosen for their diagnostic significance. Testing was conducted at the Zebra pulsed-power generator (1 MA, 100 ns risetime) at University of Nevada, Reno on a series of wire array z-pinch loads. Within this harsh z-pinch environment, radiation yields routinely exceed 20 kJ in the EUV and soft x-ray. There are also strong mechanical shocks, high velocity debris, sudden vacuum changes during operation, energic ion beams, and hard x-ray radiation in excess of 50 keV. The spectra obtained from the precursor plasma of an Al double planar wire array contained lines of Al IXmore » and AlX ions indicating a temperature near 60 eV during precursor formation. Detailed results will be presented showing the fielding specifications and the techniques used to extract important plasma parameters using this spectrometer.« less

Authors:
; ; ; ; ; ; ; ;  [1]
  1. Plasma Physics and Diagnostics Laboratory, Physics Department, University of Nevada, Reno, Nevada 89557 (United States)
Publication Date:
OSTI Identifier:
22085909
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 82; Journal Issue: 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; EV RANGE; EXTREME ULTRAVIOLET RADIATION; GRATINGS; HARD X RADIATION; ION BEAMS; LINEAR Z PINCH DEVICES; MICROCHANNEL ELECTRON MULTIPLIERS; PLASMA; PRECURSOR; PULSE GENERATORS; SHOCK WAVES; SOFT X RADIATION; SPECTRAL DENSITY; SPECTROMETERS; TIME RESOLUTION; WAVELENGTHS

Citation Formats

Williamson, K M, Kantsyrev, V L, Safronova, A S, Wilcox, P G, Cline, W, Batie, S, LeGalloudec, B, Nalajala, V, and Astanovitsky, A. Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment. United States: N. p., 2011. Web. doi:10.1063/1.3626930.
Williamson, K M, Kantsyrev, V L, Safronova, A S, Wilcox, P G, Cline, W, Batie, S, LeGalloudec, B, Nalajala, V, & Astanovitsky, A. Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment. United States. https://doi.org/10.1063/1.3626930
Williamson, K M, Kantsyrev, V L, Safronova, A S, Wilcox, P G, Cline, W, Batie, S, LeGalloudec, B, Nalajala, V, and Astanovitsky, A. 2011. "Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment". United States. https://doi.org/10.1063/1.3626930.
@article{osti_22085909,
title = {Grazing incidence extreme ultraviolet spectrometer fielded with time resolution in a hostile Z-pinch environment},
author = {Williamson, K M and Kantsyrev, V L and Safronova, A S and Wilcox, P G and Cline, W and Batie, S and LeGalloudec, B and Nalajala, V and Astanovitsky, A},
abstractNote = {This recently developed diagnostic was designed to allow for time-gated spectroscopic study of the EUV radiation (4 nm < {lambda} < 15 nm) present during harsh wire array z-pinch implosions. The spectrometer utilizes a 25 {mu}m slit, an array of 3 spherical blazed gratings at grazing incidence, and a microchannel plate (MCP) detector placed in an off-Rowland position. Each grating is positioned such that its diffracted radiation is cast over two of the six total independently timed frames of the MCP. The off-Rowland configuration allows for a much greater spectral density on the imaging plate but only focuses at one wavelength per grating. The focal wavelengths are chosen for their diagnostic significance. Testing was conducted at the Zebra pulsed-power generator (1 MA, 100 ns risetime) at University of Nevada, Reno on a series of wire array z-pinch loads. Within this harsh z-pinch environment, radiation yields routinely exceed 20 kJ in the EUV and soft x-ray. There are also strong mechanical shocks, high velocity debris, sudden vacuum changes during operation, energic ion beams, and hard x-ray radiation in excess of 50 keV. The spectra obtained from the precursor plasma of an Al double planar wire array contained lines of Al IX and AlX ions indicating a temperature near 60 eV during precursor formation. Detailed results will be presented showing the fielding specifications and the techniques used to extract important plasma parameters using this spectrometer.},
doi = {10.1063/1.3626930},
url = {https://www.osti.gov/biblio/22085909}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 9,
volume = 82,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2011},
month = {Thu Sep 15 00:00:00 EDT 2011}
}