Analysis of time-resolved argon line spectra from OMEGA direct-drive implosions

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2965779· OSTI ID:21266475

Florido, R; Nagayama, T; Mancini, R C ^[1]; Tommasini, R ^[2]; Delettrez, J A; Regan, S P; Smalyuk, V A ^[3]; Rodriguez, R; Gil, J M ^[4]

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1. Department of Physics, University of Nevada, Reno, Nevada 89557 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
3. Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)
4. Departamento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria (Spain)

We discuss the observation and data analysis of argon K-shell line spectra from argon-doped deuterium-filled OMEGA direct-drive implosion cores based on data recorded with two streaked crystal spectrometers. The targets were 870 {mu}m in diameter, 27 {mu}m wall thickness plastic shells filled with 20 atm of deuterium gas, and a tracer amount of argon for diagnostic purposes. The argon K-shell line spectrum is primarily emitted at the collapse of the implosion and its analysis provides a spectroscopic diagnostic of the core implosion conditions. The observed spectra includes the He{alpha}, Ly{alpha}, He{beta}, He{gamma}, Ly{beta}, and Ly{gamma} line emissions and their associated He- and Li-like satellites thus covering a broad photon energy range from 3100 to 4200 eV with a spectral resolution power of approximately 500. The data analysis relies on detailed atomic and spectral models that take into account nonequilibrium collisional-radiative atomic kinetics, Stark-broadened line shapes, and radiation transport calculations.

• OSTI ID: 21266475
• Journal Information: Review of Scientific Instruments, Vol. 79, Issue 10; Other Information: DOI: 10.1063/1.2965779; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
DATA ANALYSIS
DEUTERIUM
DOPED MATERIALS
EMISSION
EV RANGE
IMPLOSIONS
INERTIAL CONFINEMENT
K SHELL
PHOTONS
PLASMA DIAGNOSTICS
PLASTICS
RADIANT HEAT TRANSFER
SPECTROMETERS
THICKNESS
TIME RESOLUTION
X-RAY SPECTRA