Measurements of an Ablator-Gas Atomic Mix in Indirectly Driven Implosions at the National Ignition Facility
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Smalyuk-2014-Measurements of an ablator.pdf
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Author(s)
Frenje, Johan A.
Gatu Johnson, Maria
Petrasso, Richard D.
Date Issued
January 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Smalyuk, V. A., R. E. Tipton, J. E. Pino, D. T. Casey, G. P. Grim, B. A. Remington, D. P. Rowley, et al. “Measurements of an Ablator-Gas Atomic Mix in Indirectly Driven Implosions at the National Ignition Facility.” Physical Review Letters 112, no. 2 (January 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We present the first results from an experimental campaign to measure the atomic ablator-gas mix in the deceleration phase of gas-filled capsule implosions on the National Ignition Facility. Plastic capsules containing CD layers were filled with tritium gas; as the reactants are initially separated, DT fusion yield provides a direct measure of the atomic mix of ablator into the hot spot gas. Capsules were imploded with x rays generated in hohlraums with peak radiation temperatures of ~294 eV. While the TT fusion reaction probes conditions in the central part (core) of the implosion hot spot, the DT reaction probes a mixed region on the outer part of the hot spot near the ablator–hot-spot interface. Experimental data were used to develop and validate the atomic-mix model used in two-dimensional simulations.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.112.025002
