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Title: A technique for extending by ∼10{sup 3} the dynamic range of compact proton spectrometers for diagnosing ICF implosions on the National Ignition Facility and OMEGA

Abstract

Wedge Range Filter (WRF) proton spectrometers are routinely used on OMEGA and the NIF for diagnosing ρR and ρR asymmetries in direct- and indirect-drive implosions of D{sup 3}He-, D{sub 2}-, and DT-gas-filled capsules. By measuring the optical opacity distribution in CR-39 due to proton tracks in high-yield applications, as opposed to counting individual tracks, WRF dynamic range can be extended by 10{sup 2} for obtaining the spectral shape, and by 10{sup 3} for mean energy (ρR) measurement, corresponding to proton fluences of 10{sup 8} and 10{sup 9} cm{sup −2}, respectively. Using this new technique, ρR asymmetries can be measured during both shock and compression burn (proton yield ∼10{sup 8} and ∼10{sup 12}, respectively) in 2-shock National Ignition Facility implosions with the standard WRF accuracy of ±∼10 mg/cm{sup 2}.

Authors:
; ; ; ; ; ; ;  [1]
  1. Massachusetts Institute of Technology Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
22308940
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; 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; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCURACY; ASYMMETRY; CAPSULES; DEUTERIUM; FILTERS; HELIUM 3; IMPLOSIONS; INDIRECT DRIVE ICF; OPACITY; PARTICLE TRACKS; PROTON SPECTROMETERS; TRITIUM; US NATIONAL IGNITION FACILITY

Citation Formats

Sio, H., E-mail: hsio@mit.edu, Séguin, F. H., Frenje, J. A., Gatu Johnson, M., Zylstra, A. B., Rinderknecht, H. G., Rosenberg, M. J., Li, C. K., and Petrasso, R. D. A technique for extending by ∼10{sup 3} the dynamic range of compact proton spectrometers for diagnosing ICF implosions on the National Ignition Facility and OMEGA. United States: N. p., 2014. Web. doi:10.1063/1.4892439.
Sio, H., E-mail: hsio@mit.edu, Séguin, F. H., Frenje, J. A., Gatu Johnson, M., Zylstra, A. B., Rinderknecht, H. G., Rosenberg, M. J., Li, C. K., & Petrasso, R. D. A technique for extending by ∼10{sup 3} the dynamic range of compact proton spectrometers for diagnosing ICF implosions on the National Ignition Facility and OMEGA. United States. https://doi.org/10.1063/1.4892439
Sio, H., E-mail: hsio@mit.edu, Séguin, F. H., Frenje, J. A., Gatu Johnson, M., Zylstra, A. B., Rinderknecht, H. G., Rosenberg, M. J., Li, C. K., and Petrasso, R. D. 2014. "A technique for extending by ∼10{sup 3} the dynamic range of compact proton spectrometers for diagnosing ICF implosions on the National Ignition Facility and OMEGA". United States. https://doi.org/10.1063/1.4892439.
@article{osti_22308940,
title = {A technique for extending by ∼10{sup 3} the dynamic range of compact proton spectrometers for diagnosing ICF implosions on the National Ignition Facility and OMEGA},
author = {Sio, H., E-mail: hsio@mit.edu and Séguin, F. H. and Frenje, J. A. and Gatu Johnson, M. and Zylstra, A. B. and Rinderknecht, H. G. and Rosenberg, M. J. and Li, C. K. and Petrasso, R. D.},
abstractNote = {Wedge Range Filter (WRF) proton spectrometers are routinely used on OMEGA and the NIF for diagnosing ρR and ρR asymmetries in direct- and indirect-drive implosions of D{sup 3}He-, D{sub 2}-, and DT-gas-filled capsules. By measuring the optical opacity distribution in CR-39 due to proton tracks in high-yield applications, as opposed to counting individual tracks, WRF dynamic range can be extended by 10{sup 2} for obtaining the spectral shape, and by 10{sup 3} for mean energy (ρR) measurement, corresponding to proton fluences of 10{sup 8} and 10{sup 9} cm{sup −2}, respectively. Using this new technique, ρR asymmetries can be measured during both shock and compression burn (proton yield ∼10{sup 8} and ∼10{sup 12}, respectively) in 2-shock National Ignition Facility implosions with the standard WRF accuracy of ±∼10 mg/cm{sup 2}.},
doi = {10.1063/1.4892439},
url = {https://www.osti.gov/biblio/22308940}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 85,
place = {United States},
year = {Sat Nov 15 00:00:00 EST 2014},
month = {Sat Nov 15 00:00:00 EST 2014}
}