Development of the Passive Shock Breakout diagnostic for the National Ignition Facility

Details Development of the Passive Shock Breakout diagnostic for the National Ignition Facility Development of the Passive Shock Breakout diagnostic for the National Ignition Facility

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dppbp1057s&link_type=abstract

American Physical Society, 45th Annual Meeting of the Division of Plasma Physics, October 27-31, 2003, Albuquerque, New Mexico,

Physics

Plasma Physics

Scientific paper

The passive shock breakout (PSBO) diagnostic is an optical imager that projects an image of a target surface onto the slit of a UV-sensitive optical streak camera. It relies on shock luminescence to produce the signal. It can measure shock velocities by detecting the breakout times of a shock propagating through a stepped or a wedge-shaped target sample. This diagnostic will make measurements of shock breakout across witness plates and ablator samples for hohlraum driven targets. Hohlraum drive temperatures will range from approximately 100 eV up to 300 eV or more. These measurements are needed to characterize the hohlraum drive quality and to characterize ablator materials. Accurate characterization of hohlraum drive strength and drive history is an essential need of the inertial confinement fusion program and of the high energy density science program. The current design calls for an F/11 Cassegrain telescope, with the primary mirror 42cm in dia. and the secondary mirror placed 45cm from the primary and 4m from the NIF target chamber center (TCC). The telescope image is recorded by an optical streak camera placed outside the target chamber. The Cassegrain telescope is diffraction limited to 7.2 um at TCC; however, the streak camera will limit the actual resolution at TCC to about 12 um at magnification 5.1.

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