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Title: High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas

Abstract

The Orion high-resolution x-ray (OHREX) spectrometer has been a successful tool for measuring the shapes of density-broadened spectral lines produced in short-pulse heated plasmas at the Orion laser facility. We have recently outfitted the instrument with a charge-couple device (CCD) camera, which greatly increased the accuracy with which we can perform line-shift measurements. Because OHREX is located on the outside of the Orion target chamber, no provisions for the shielding of electromagnetic pulses are required. With the CCD, we obtained a higher signal-to-noise ratio than we previously obtained with an image-plate detector. As a result, this allowed us to observe structure in the image produced by the diffraction from the two OHREX crystals, which was highly reproducible from shot to shot. This structure will ultimately limit the accuracy of our spectroscopic measurements

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. AWE plc, Reading (United Kingdom)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1545369
Alternate Identifier(s):
OSTI ID: 1562806
Report Number(s):
LLNL-JRNL-749819
Journal ID: ISSN 0034-6748
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
Physics - Atomic and molecular physics, Physics - Plasma physics

Citation Formats

Beiersdorfer, P., Magee, E. W., Brown, G. V., Hell, N., McKelvey, A., Shepherd, R., Hoarty, D. J., Brown, C. R. D., Hill, M. P., Hobbs, L. M. R., James, S. F., and Wilson, L. High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas. United States: N. p., 2018. Web. doi:10.1063/1.5035303.
Beiersdorfer, P., Magee, E. W., Brown, G. V., Hell, N., McKelvey, A., Shepherd, R., Hoarty, D. J., Brown, C. R. D., Hill, M. P., Hobbs, L. M. R., James, S. F., & Wilson, L. High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas. United States. doi:10.1063/1.5035303.
Beiersdorfer, P., Magee, E. W., Brown, G. V., Hell, N., McKelvey, A., Shepherd, R., Hoarty, D. J., Brown, C. R. D., Hill, M. P., Hobbs, L. M. R., James, S. F., and Wilson, L. Fri . "High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas". United States. doi:10.1063/1.5035303. https://www.osti.gov/servlets/purl/1545369.
@article{osti_1545369,
title = {High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas},
author = {Beiersdorfer, P. and Magee, E. W. and Brown, G. V. and Hell, N. and McKelvey, A. and Shepherd, R. and Hoarty, D. J. and Brown, C. R. D. and Hill, M. P. and Hobbs, L. M. R. and James, S. F. and Wilson, L.},
abstractNote = {The Orion high-resolution x-ray (OHREX) spectrometer has been a successful tool for measuring the shapes of density-broadened spectral lines produced in short-pulse heated plasmas at the Orion laser facility. We have recently outfitted the instrument with a charge-couple device (CCD) camera, which greatly increased the accuracy with which we can perform line-shift measurements. Because OHREX is located on the outside of the Orion target chamber, no provisions for the shielding of electromagnetic pulses are required. With the CCD, we obtained a higher signal-to-noise ratio than we previously obtained with an image-plate detector. As a result, this allowed us to observe structure in the image produced by the diffraction from the two OHREX crystals, which was highly reproducible from shot to shot. This structure will ultimately limit the accuracy of our spectroscopic measurements},
doi = {10.1063/1.5035303},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

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