Debris Characterization Diagnostic for the National Ignition Facility

Conference · Wed Jun 07 04:00:00 EDT 2000

OSTI ID:791290

Miller, M C ^[1]; Suter, L J; Tobin, M T; Grun, J; Davis, J F; Barnes, C W; Wilson, D C

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1. LLNL

Generation of debris from targets and by x-ray ablation of surrounding materials will be a matter of concern for experimenters and the operations staff at the National Ignition Facility (NIF). Target chamber and final optics protection, for example debris shield damage, and efficient facility operation drive the interest for the NIF staff. Experimenters are primarily concerned with diagnostic survivability, separation of mechanical versus radiation induced test object response in the case of effects tests, and radiation transport through the debris field when the net radiation output is used to benchmark computer codes. In addition, radiochemical analysis of activated capsule debris during ignition shots can provide a measure of the ablator. Conceptual design of the Debris Monitor and Rad-Chem Station, one of the NIF core diagnostics, is presented. Methods of debris collection, particle size and mass analysis, impulse measurement, and radiochemical analysis are given. A description of recent experiments involving debris collection and impulse measurement on the OMEGA and Pharos lasers is also provided.

• Research Organization: Lawrence Livermore National Lab., Livermore, CA (US)
• Sponsoring Organization: USDOE Office of Defense Programs (DP) (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 791290
• Report Number(s): UCRL-JC-137945
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
BENCHMARKS
COMPUTER CODES
IGNITION
LASERS
MONITORS
OPTICS
PARTICLE SIZE
PLASMA DIAGNOSTICS
RADIATION TRANSPORT
RADIATIONS
RADIOCHEMICAL ANALYSIS
SHIELDS
TARGET CHAMBERS
TARGETS
US NATIONAL IGNITION FACILITY