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Observation of High Soft X-Ray Drive in Large-Scale Hohlraums at the National Ignition Facility

J. L. Kline et al.
Phys. Rev. Lett. 106, 085003 – Published 25 February 2011
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Abstract

The first soft x-ray radiation flux measurements from hohlraums using both a 96 and a 192 beam configuration at the National Ignition Facility have shown high x-ray conversion efficiencies of 85%90%. These experiments employed gold vacuum hohlraums, 6.4 mm long and 3.55 mm in diameter, heated with laser energies between 150–635 kJ. The hohlraums reached radiation temperatures of up to 340 eV. These hohlraums for the first time reached coronal plasma conditions sufficient for two-electron processes and coronal heat conduction to be important for determining the radiation drive.

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  • Received 30 April 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.085003

© 2011 American Physical Society

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Big science in a small space

Published 25 February 2011

To create the conditions needed for nuclear fusion, the National Ignition Facility uses high power lasers to generate near solar levels of heat in a pill-size cavity.

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Vol. 106, Iss. 8 — 25 February 2011

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