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Title: Proton pinhole imaging on the National Ignition Facility

Abstract

Here, pinhole imaging of large (mm scale) carbon-deuterium (CD) plasmas by proton self-emission has been used for the first time to study the microphysics of shock formation, which is of astrophysical relevance. The 3 MeV deuterium-deuterium (DD) fusion proton self-emission from these plasmas is imaged using a novel pinhole imaging system, with up to five different 1 mm diameter pinholes positioned 25 cm from target-chamber center. CR39 is used as the detector medium, positioned at 100 cm distance from the pinhole for a magnification of 4×. A Wiener deconvolution algorithm is numerically demonstrated and used to interpret the images. When the spatial morphology is known, this algorithm accurately reproduces the size of features larger than about half the pinhole diameter. For these astrophysical plasma experiments on the National Ignition Facility, this provides a strong constraint on simulation modeling of the experiment.

Authors:
ORCiD logo [1];  [2];  [2];  [3]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [2];  [4]; ORCiD logo [4];  [2]; ORCiD logo [2]; ORCiD logo [2];  [2];  [4];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1341866
Alternate Identifier(s):
OSTI ID: 1360158
Report Number(s):
LA-UR-16-23558
Journal ID: ISSN 0034-6748; RSINAK; TRN: US1701753
Grant/Contract Number:  
AC52-06NA25396; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Zylstra, Alex B., Park, H. -S., Ross, J. S., Fiuza, F., Frenje, J. A., Higginson, D. P., Huntington, C., Li, C. K., Petrasso, R. D., Pollock, B., Remington, B., Rinderknecht, H. G., Ryutov, D., Seguin, F. H., Turnbull, D., and Wilks, S. C. Proton pinhole imaging on the National Ignition Facility. United States: N. p., 2016. Web. doi:10.1063/1.4959782.
Zylstra, Alex B., Park, H. -S., Ross, J. S., Fiuza, F., Frenje, J. A., Higginson, D. P., Huntington, C., Li, C. K., Petrasso, R. D., Pollock, B., Remington, B., Rinderknecht, H. G., Ryutov, D., Seguin, F. H., Turnbull, D., & Wilks, S. C. Proton pinhole imaging on the National Ignition Facility. United States. doi:10.1063/1.4959782.
Zylstra, Alex B., Park, H. -S., Ross, J. S., Fiuza, F., Frenje, J. A., Higginson, D. P., Huntington, C., Li, C. K., Petrasso, R. D., Pollock, B., Remington, B., Rinderknecht, H. G., Ryutov, D., Seguin, F. H., Turnbull, D., and Wilks, S. C. Fri . "Proton pinhole imaging on the National Ignition Facility". United States. doi:10.1063/1.4959782. https://www.osti.gov/servlets/purl/1341866.
@article{osti_1341866,
title = {Proton pinhole imaging on the National Ignition Facility},
author = {Zylstra, Alex B. and Park, H. -S. and Ross, J. S. and Fiuza, F. and Frenje, J. A. and Higginson, D. P. and Huntington, C. and Li, C. K. and Petrasso, R. D. and Pollock, B. and Remington, B. and Rinderknecht, H. G. and Ryutov, D. and Seguin, F. H. and Turnbull, D. and Wilks, S. C.},
abstractNote = {Here, pinhole imaging of large (mm scale) carbon-deuterium (CD) plasmas by proton self-emission has been used for the first time to study the microphysics of shock formation, which is of astrophysical relevance. The 3 MeV deuterium-deuterium (DD) fusion proton self-emission from these plasmas is imaged using a novel pinhole imaging system, with up to five different 1 mm diameter pinholes positioned 25 cm from target-chamber center. CR39 is used as the detector medium, positioned at 100 cm distance from the pinhole for a magnification of 4×. A Wiener deconvolution algorithm is numerically demonstrated and used to interpret the images. When the spatial morphology is known, this algorithm accurately reproduces the size of features larger than about half the pinhole diameter. For these astrophysical plasma experiments on the National Ignition Facility, this provides a strong constraint on simulation modeling of the experiment.},
doi = {10.1063/1.4959782},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {7}
}

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