Actions for South pole bang-time diagnostic on the National Ignition Facility [electronic resource].

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South pole bang-time diagnostic on the National Ignition Facility [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 8 pages; size: 0.7 Mbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The south pole bang-time (SPBT) diagnostic views National Ignition Facility (NIF) implosions through the lower hohlraum laser entrance hole to measure the time of peak x-ray emission (peak compression) in indirect drive implosions. Five chemical-vapor-deposition (CVD) diamond photoconductive detectors (PCD's) with different filtrations and sensitivities record the time-varying x rays emitted by the target. Wavelength-selecting highly oriented pyrolytic graphite (HOPG) crystal mirror monochromators increase the x-ray signal-to-background ratio by filtering for 11-keV emission. Diagnostic timing and the in-situ temporal instrument response function are determined from laser impulse shots on the NIF. After signal deconvolution and background removal, the bang time is determined to 45-ps accuracy. The x-ray 'yield' (mJ/sr/keV at 11 keV) is determined from the total area under the peak.
Report Numbers
E 1.99:llnl-conf-555913
llnl-conf-555913
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Note
Published through SciTech Connect.
05/01/2012.
"llnl-conf-555913"
Presented at: High-Temperature Plasma Diagnostics Conference, Monterey, CA, United States, May 06 - May 10, 2012.
Callahan, D A; Stoeckl, C; Mackinnon, A J; Bradley, D K; Glebov, V; Sangster, T C; Burns, S; Celeste, J; Kilkenny, J; Kimbrough, J; Eckart, M J; Bond, E J; Parker, J; Magoon, J; Shoup, M J; MacPhee, A; Edgell, D; Hey, D; Lacielle, G; Thomas, T.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14737816