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Title: Rapid, absolute calibration of x-ray filters employed by laser-produced plasma diagnostics

Abstract

The Electron Beam Ion Trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of x-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete monoenergetic lines at appropriately chosen x-ray energies. X rays are detected using the high resolution EBIT Calorimeter Spectrometer (ECS), developed for LLNL at the NASA/Goddard Space Flight Center. X-ray filter transmission efficiency is determined by dividing the x-ray counts detected when the filter is in the line of sight by those detected when out of the line of sight. Verification of filter thickness can be completed in only a few hours, and absolute efficiencies can be calibrated in a single day over a broad range from about 0.1 to 15 keV. The EBIT calibration lab has been used to field diagnostics (e.g., the OZSPEC instrument) with fully calibrated x-ray filters at the OMEGA laser. Extensions to use the capability for calibrating filter transmission for the DANTE instrument on the National Ignition Facility are discussed.

Authors:
; ; ; ; ; ; ; ;  [1]; ; ;  [2]
  1. Department of Physical Sciences, High Energy Density Physics and Astrophysics Division, Lawrence Livermore National Laboratory, 7000 East Avenue, L-260, Livermore, California 94550 (United States)
  2. NASA/Goddard Space Flight Center, Greenbelt, Maryland 20770 (United States)
Publication Date:
OSTI Identifier:
21266474
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 79; Journal Issue: 10; Conference: HTPD08: 17. topical conference on high-temperature plasma diagnostics, Albuquerque, NM (United States), 11-15 May 2008; Other Information: DOI: 10.1063/1.2965214; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CALIBRATION; CALORIMETERS; EFFICIENCY; ELECTRON BEAMS; FILTERS; IONS; KEV RANGE; LASER-PRODUCED PLASMA; LASERS; LAWRENCE LIVERMORE NATIONAL LABORATORY; NASA; PLASMA DIAGNOSTICS; SPACE FLIGHT; SPECTROMETERS; THICKNESS; TRANSMISSION; US NATIONAL IGNITION FACILITY; X RADIATION; X-RAY DETECTION

Citation Formats

Brown, G. V., Beiersdorfer, P., Emig, J., Frankel, M., Gu, M. F., Heeter, R. F., Magee, E., Thorn, D. B., Widmann, K., Kelley, R. L., Kilbourne, C. A., and Porter, F. S.. Rapid, absolute calibration of x-ray filters employed by laser-produced plasma diagnostics. United States: N. p., 2008. Web. doi:10.1063/1.2965214.
Brown, G. V., Beiersdorfer, P., Emig, J., Frankel, M., Gu, M. F., Heeter, R. F., Magee, E., Thorn, D. B., Widmann, K., Kelley, R. L., Kilbourne, C. A., & Porter, F. S.. Rapid, absolute calibration of x-ray filters employed by laser-produced plasma diagnostics. United States. doi:10.1063/1.2965214.
Brown, G. V., Beiersdorfer, P., Emig, J., Frankel, M., Gu, M. F., Heeter, R. F., Magee, E., Thorn, D. B., Widmann, K., Kelley, R. L., Kilbourne, C. A., and Porter, F. S.. Wed . "Rapid, absolute calibration of x-ray filters employed by laser-produced plasma diagnostics". United States. doi:10.1063/1.2965214.
@article{osti_21266474,
title = {Rapid, absolute calibration of x-ray filters employed by laser-produced plasma diagnostics},
author = {Brown, G. V. and Beiersdorfer, P. and Emig, J. and Frankel, M. and Gu, M. F. and Heeter, R. F. and Magee, E. and Thorn, D. B. and Widmann, K. and Kelley, R. L. and Kilbourne, C. A. and Porter, F. S.},
abstractNote = {The Electron Beam Ion Trap (EBIT) facility at the Lawrence Livermore National Laboratory is being used to absolutely calibrate the transmission efficiency of x-ray filters employed by diodes and spectrometers used to diagnose laser-produced plasmas. EBIT emits strong, discrete monoenergetic lines at appropriately chosen x-ray energies. X rays are detected using the high resolution EBIT Calorimeter Spectrometer (ECS), developed for LLNL at the NASA/Goddard Space Flight Center. X-ray filter transmission efficiency is determined by dividing the x-ray counts detected when the filter is in the line of sight by those detected when out of the line of sight. Verification of filter thickness can be completed in only a few hours, and absolute efficiencies can be calibrated in a single day over a broad range from about 0.1 to 15 keV. The EBIT calibration lab has been used to field diagnostics (e.g., the OZSPEC instrument) with fully calibrated x-ray filters at the OMEGA laser. Extensions to use the capability for calibrating filter transmission for the DANTE instrument on the National Ignition Facility are discussed.},
doi = {10.1063/1.2965214},
journal = {Review of Scientific Instruments},
number = 10,
volume = 79,
place = {United States},
year = {Wed Oct 15 00:00:00 EDT 2008},
month = {Wed Oct 15 00:00:00 EDT 2008}
}