Saturn-ring proton backlighters for the NIF
Name
20ja023_full.pdf
Size
3.9 MB
Format
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Checksum (MD5)
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Author(s)
Zylstra, A.B.
Craxton, R.S.
Rygg, J.R.
Li, Chi-Kang
Carlson, L.
Manuel, M. J.-E.
Youngblood, K.
Garcia, E.M.
Browning, L.T.
Le Pape, S.
Date Issued
April 2020
Journal
Review of Scientific Instruments
Publisher
AIP
Abstract
Proton radiography is a well-established technique for measuring electromagnetic fields in high-energy-density plasmas. Fusion reactions producing monoenergetic particles, such as D3He, are commonly used as a source, produced by a capsule implosion. Using smaller capsules for radiography applications is advantageous as the source size decreases, but on the NIF this is complicated by the risk introduced from increasing blow-by light, since the phase plate focal spot size is much larger than the capsules. We report a demonstration of backlighter targets where a ‘Saturn’ ring is placed around the capsule to block this light. The nuclear performance of the backlighters is unperturbed by the addition of a ring. We also test a ring with an equatorial cutout, which severely affects the proton emission and is not viable for radiography applications. These results demonstrate the general viability of Saturn ring backlighter targets for use on NIF.
Description
Submitted for publication in Review of Scientific Instruments
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/5.0021027
