Understanding reconstructed Dante spectra using high resolution spectroscopy

May, M. J.; Weaver, J.; Widmann, K.; Kemp, G. E.; Thorn, D.; Colvin, J. D.; Schneider, M. B.; Moore, A.; Blue, B. E.

doi:10.1063/1.4961267

Title: Understanding reconstructed Dante spectra using high resolution spectroscopy

Journal Article · Mon Aug 22 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4961267· OSTI ID:1460935

May, M. J. ^[1];

^[2];

^[1]; Kemp, G. E. ^[1]; Thorn, D. ^[1];

^[1];

^[1]; Moore, A. ^[1]; Blue, B. E. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Naval Research Lab. (NRL), Washington, DC (United States)

The Dante is an 18 channel filtered diode array used at the National Ignition Facility (NIF) to measure the spectrally and temporally resolved radiation flux between 50 eV and 20 keV from various targets. The absolute flux is determined from the radiometric calibration of the x-ray diodes, filters, and mirrors and a reconstruction algorithm applied to the recorded voltages from each channel. The reconstructed spectra are very low resolution with features consistent with the instrument response and are not necessarily consistent with the spectral emission features from the plasma. Errors may exist between the reconstructed spectra and the actual emission features due to assumptions in the algorithm. Recently, a high resolution convex crystal spectrometer, VIRGIL, has been installed at NIF with the same line of sight as the Dante. Spectra from L-shell Ag and Xe have been recorded by both VIRGIL and Dante. Lastly, comparisons of these two spectroscopic measurements yield insights into the accuracy of the Dante reconstructions.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1460935

Report Number(s):: LLNL-JRNL-692917; RSINAK; 820802; TRN: US1901930

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 11; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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References (8)

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Fluorescence and absorption spectroscopy for warm dense matter studies and ICF plasma diagnostics Hansen, S. B.; Harding, E. C.; Knapp, P. F. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5018580	journal	May 2018
Development and modeling of a polar-direct-drive exploding pusher platform at the National Ignition Facility Ellison, C. Leland; Whitley, Heather D.; Brown, Colin R. D. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5025724	journal	July 2018
Investigation of high X-ray conversion efficiency Kr filled gas sources at the National Ignition Facility May, M. J.; Kemp, G. E.; Colvin, J. D. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5097960	journal	June 2019

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