Ion velocity distributions from spherical 1054 nm and 351 nm laser plasmas

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6294901

Boswell, B; Boehly, T; Delettrez, J; Goldman, L M; Richardson, M C; Sarraf, S

We report the observation of ion velocity distributions from spherically illuminated targets, and compare the results to the predictions of analytical ablation models and the 1-D hydrodynamic code LILAC. Low-Z spherical targets were irradiated at 351 nm and 1054 nm by the OMEGA laser system at intensities less than or equal to 10/sup 15/ W/cm/sup 2/. The uv pulses were from 6 and 12 beams, 600 ps duration, and the ir from 24 beams, 1 ns duration. Velocity distributions were taken with Faraday cups and a Thomson parabola. Peak velocities for uv show agreement with the exhaust velocities predicted by the spherical steady-state ablation model, and agree in shape with LILAC simulations, while ir velocity distributions are more characteristic of isothermal expansion.

• Research Organization: Rochester Univ., NY (USA). Lab. for Laser Energetics
• DOE Contract Number: AC08-80DP40124
• OSTI ID: 6294901
• Report Number(s): DOE/DP/40124-49; CONF-841010-3; ON: DE85002816
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
COMPUTER CALCULATIONS
DISTRIBUTION FUNCTIONS
FLUID MECHANICS
FUNCTIONS
HYDRODYNAMICS
ION EMISSION
LASER TARGETS
LASER-PRODUCED PLASMA
MECHANICS
OMEGA FACILITY
ONE-DIMENSIONAL CALCULATIONS
PLASMA
TARGETS
VELOCITY