Developing an Experimental Basis for Understanding Transport in NIF Hohlraum Plasmas

M. A. Barrios, J. D. Moody, L. J. Suter, M. Sherlock, H. Chen, W. Farmer, J. Jaquez, O. Jones, R. L. Kauffman, J. D. Kilkenny, J. Kroll, O. L. Landen, D. A. Liedahl, S. A. Maclaren, N. B. Meezan, A. Nikroo, M. B. Schneider, D. B. Thorn, K. Widmann, and G. Pérez-Callejo
Phys. Rev. Lett. 121, 095002 – Published 31 August 2018

Abstract

We report on the first multilocation electron temperature (Te) and flow measurements in an ignition hohlraum at the National Ignition Facility using the novel technique of mid-Z spectroscopic tracer “dots.” The measurements define a low resolution “map” of hohlraum plasma conditions and provide a basis for the first multilocation tests of particle and energy transport physics in a laser-driven x-ray cavity. The data set is consistent with classical heat flow near the capsule but reduced heat flow near the laser entrance hole. We evaluate the role of kinetic effects, self-generated magnetic fields, and instabilities in causing spatially dependent heat transport in the hohlraum.

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  • Received 21 January 2018
  • Revised 22 July 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.095002

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

M. A. Barrios1,*, J. D. Moody2, L. J. Suter2, M. Sherlock2, H. Chen2, W. Farmer2, J. Jaquez3, O. Jones2, R. L. Kauffman2, J. D. Kilkenny2, J. Kroll2, O. L. Landen2, D. A. Liedahl2, S. A. Maclaren2, N. B. Meezan2, A. Nikroo2, M. B. Schneider2, D. B. Thorn2, K. Widmann2, and G. Pérez-Callejo4

  • 1In-Q-Tel, Menlo Park, California 94025, USA
  • 2Lawrence Livermore National Laboratory, Livermore, California 94551, USA
  • 3General Atomics, San Diego, California 92186, USA
  • 4Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

  • *mbarrios@iqt.org

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Issue

Vol. 121, Iss. 9 — 31 August 2018

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