Measurement of x-ray emission and thermal transport in near-solid-density plasmas heated by 130 fs laser pulses
- University of California, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)
Near-solid-density plasmas with peak temperatures of 370{plus_minus}50 eV have been generated using a high-contrast ({approx}10{sup {minus}7}), 400 nm, 130 fs laser pulse of intensity 3{times}10{sup 17} Wthinspcm{sup {minus}2} at the Ultrashort Pulse Laser at Lawrence Livermore National Laboratory. The x-ray-emission spectra from thin tracer layers of germanium, tamped by layers of plastic, were measured as a function of target depth. The results qualitatively agree with calculations based on detailed local thermodynamic equilibrium (LTE) and modified non-LTE spectroscopic opacity models using plasma conditions determined using LASNEX hydrodynamic simulations. No evidence of thermal flux inhibition into the bulk target material was observed. The experiments and detailed simulations are presented. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 662222
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 58, Issue 4; Other Information: PBD: Oct 1998
- Country of Publication:
- United States
- Language:
- English
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