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Author Stoeckl, C. ♦ Glebov, V. Yu. ♦ Meyerhofer, D. D. ♦ Seka, W. ♦ Yaakobi, B. ♦ Town, R. P. J. ♦ Zuegel, J. D.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ COMPRESSION ♦ EFFICIENCY ♦ ELECTRONS ♦ ENERGY RANGE ♦ IGNITION ♦ IMPLOSIONS ♦ INERTIAL CONFINEMENT ♦ LASERS ♦ PHYSICS ♦ RADIATIONS ♦ TARGETS ♦ US NATIONAL IGNITION FACILITY
Abstract Laser--plasma instabilities that produce an unacceptably high level of hot electrons are potentially dangerous for both direct-drive and indirect-drive inertial confinement laser fusion. The hot electrons preheat the fuel and prevent compression of the capsule to the requisite conditions for ignition. Fast electron generation and preheat can be inferred from the hard x-ray radiation generated by the interaction of the hot electrons with the target. On the University of Rochesters OMEGA laser system, time-resolved hard x-ray detectors have been operating in an energy range from 10 to 500 keV. In this article we will present initial results for the yield and spectrum of the hard x-ray radiation. The concept used on OMEGA can be easily extended to infer the amount of laser energy coupled to suprathermal electrons and to the target for both direct- and indirect-drive implosions on the upcoming National Ignition Facility, as well as to measure the conversion efficiency in high-x-ray-yield experiments.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-01-01
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 72
Issue Number 1


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