The design and characterization of toroidal-shaped NOVA hohlraums that simulate National Ignition Facility plasma conditions for plasma instability experiments

Details The design and characterization of toroidal-shaped NOVA hohlraums that simulate National Ignition Facility plasma conditions for plasma instability experiments The design and characterization of toroidal-shaped NOVA hohlraums that simulate National Ignition Facility plasma conditions for plasma instability experiments

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..369..255w&link_type=abstract

Laser interaction and related plasma phenomena: 12th international conference. AIP Conference Proceedings, Volume 369, pp. 255-

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3

Plasma Production And Heating By Laser Beams, Nonlinear Phenomena: Waves, Wave Propagation, And Other Interactions, Theory, Design, And Computerized Simulation

Scientific paper

Special Nova hohlraums have been designed to simulate the plasma conditions calculated for various NIF hohlraum point designs. These hohlraums attempt to maximize the laser pathlength for parametric instability measurements. A toroidal-shaped hohlraum with a diameter of 3200 microns and a length of 1600 microns allows a laser pathlength of about 2 mm. Filling the hohlraum with 1 atmosphere of neopentane gas gives an electron temperature of 3 keV and electron density near 0.1 of critical. Detailed LASNEX calculations for these hohlraums and comparisons to the NIF point design will be presented. Comparisons between data and calculations that characterize the plasma conditions (electron, radiation, and ion temperatures, electron density, etc.) in these Nova hohlraums will also be shown.

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