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Author Kodama, R. ♦ Takahashi, K. ♦ Tanaka, K. A. ♦ Kato, Y. ♦ Murai, K. ♦ Weber, F. ♦ Barbee, T. W. ♦ DaSilva, L. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ PLASMA DIAGNOSTICS ♦ PLASMA DENSITY ♦ REFRACTIVE INDEX ♦ X RADIATION ♦ ELECTRON DENSITY ♦ HYDRODYNAMICS ♦ PLASMA SIMULATION ♦ INTERFEROMETERS ♦ SHOCK WAVES
Abstract We developed a 19.6 nm laser x-ray laser grid-image refractometer (XRL-GIR) to diagnose laser-hole boring into overdense plasmas. The XRL-GIR was optimized to measure two-dimensional electron density perturbation on a scale of a few tens of {mu}m in underdense plasmas. Electron density profiles of laser-produced plasmas were obtained for 10{sup 20}{endash}10{sup 22}thinspcm{sup {minus}3} with the XRL-GIR and for 10{sup 19}{endash}10{sup 20}thinspcm{sup {minus}3} from an ultraviolet interferometer, the profiles of which were compared with those from hydrodynamic simulation. By using this XRL-GIR, we directly observed laser channeling into overdense plasmas accompanied by a bow shock wave showing a Mach cone ascribed to supersonic propagation of the channel front. {copyright} {ital 1999 American Institute of Physics.}
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-01-01
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 70
Issue Number 1
Technical Publication No. CONF-980605-


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