Using multiple secondary fusion products to evaluate fuel ρR, electron temperature, and mix in deuterium-filled implosions at the NIF

Rinderknecht, H. G.; Rosenberg, M. J.; Zylstra, A. B.; Lahmann, B.; Séguin, F. H.; Frenje, J. A.; Li, C. K.; Gatu Johnson, M.; Petrasso, R. D.; Berzak Hopkins, L. F.; Caggiano, J. A.; Divol, L.; Hartouni, E. P.; Hatarik, R.; Hatchett, S. P.; Le Pape, S.; Mackinnon, A. J.; McNaney, J. M.; Meezan, N. B.; Moran, M. J.; Bradley, P. A.; Kline, J. L.; Krasheninnikova, N. S.; Kyrala, G. A.; Murphy, T. J.; Schmitt, M. J.; Tregillis, I. L.; Batha, S. H.; Knauer, J. P.; Kilkenny, J. D.

doi:10.1063/1.4928382

Title: Using multiple secondary fusion products to evaluate fuel ρR, electron temperature, and mix in deuterium-filled implosions at the NIF

Journal Article · Tue Aug 25 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4928382· OSTI ID:1234575

^[1]; Rosenberg, M. J. ^[1]; Zylstra, A. B. ^[1];

^[1]; Séguin, F. H. ^[1];

^[1]; Li, C. K. ^[1]; Gatu Johnson, M. ^[1];

^[1];

^[2]; Caggiano, J. A. ^[2]; Divol, L. ^[2];

^[2]; Hatarik, R. ^[2]; Hatchett, S. P. ^[2]; Le Pape, S. ^[2]; Mackinnon, A. J. ^[2]; McNaney, J. M. ^[2]; Meezan, N. B. ^[2]; Moran, M. J. ^[2] more »

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
General Atomics, San Diego, CA (United States)

In deuterium-filled inertial confinement fusion implosions, the secondary fusion processes D(³He,p)⁴He and D(T,n)⁴He occur, as the primary fusion products ³He and T react in flight with thermal deuterons. In implosions with moderate fuel areal density (~ 5–100 mg/cm²), the secondary D-³He reaction saturates, while the D-T reaction does not, and the combined information from these secondary products is used to constrain both the areal density and either the plasma electron temperature or changes in the composition due to mix of shell material into the fuel. The underlying theory of this technique is developed and applied to three classes of implosions on the National Ignition Facility: direct-drive exploding pushers, indirect-drive 1-shock and 2-shock implosions,and polar direct-drive implosions. In the 1- and 2-shock implosions, the electron temperature is inferred to be 0.65 x and 0.33 x the burn-averaged ion temperature, respectively. The inferred mixed mass in the polar direct-drive implosions is in agreement with measurements using alternative techniques.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

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

Grant/Contract Number:: AC52-07NA27344; NA0001857; FG52-09NA29553; NA0000877; B580243

OSTI ID:: 1234575

Alternate ID(s):: OSTI ID: 1215673; OSTI ID: 1229638

Report Number(s):: LLNL-JRNL-671547

Journal Information:: Physics of Plasmas, Vol. 22, Issue 8; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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Modified parameterization of the Li-Petrasso charged-particle stopping power theory Zylstra, A. B.; Rinderknecht, H. G.; Frenje, J. A. Physics of Plasmas, Vol. 26, Issue 12 https://doi.org/10.1063/1.5114637	journal	December 2019
Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas Frenje, J. A. Plasma Physics and Controlled Fusion, Vol. 62, Issue 2 https://doi.org/10.1088/1361-6587/ab5137	journal	January 2020
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