Thermal transport measurements in six-beam, ultraviolet irradiation of spherical targets
Journal Article
·
· J. Appl. Phys.; (United States)
Thermal transport, mass ablation rates, and preheat have been studied in spherical irradiation at lambda = 351 nm, using six of the 24 beams of the OMEGA spherical irradiation laser system at the Laboratory for Laser Energetics. Mass ablation rates are higher at 351-nm than at 1054-nm irradiation, even when compared at the same absorbed irradiance. Similar to the case of 1054-nm irradiation, very deep burnthrough was found at 351 nm. However, the shallow-gradient temperature profile at the heat front, characteristic of the experiments at 1054 nm, was not observed here, nor was the large difference between uniform and tight focus irradiation of spherical targets. Ablation pressures derived from charge-collector data rise from 10 to 100 Mbar for absorbed irradiance in the range of 4 x 10/sup 13/ to 9 x 10/sup 14/ W/cm/sup 2/.
- Research Organization:
- Laboratory for Laser Energetics, 250 East River Road, University of Rochester, Rochester, New York 14623
- DOE Contract Number:
- AC08-80DP40124
- OSTI ID:
- 5883113
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 57:9; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ABLATION
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
HEAT TRANSFER
HEATING
INFRARED RADIATION
LASER RADIATION
LASER TARGETS
LASER-RADIATION HEATING
PLASMA HEATING
RADIATIONS
TARGETS
ULTRAVIOLET RADIATION
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ABLATION
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
HEAT TRANSFER
HEATING
INFRARED RADIATION
LASER RADIATION
LASER TARGETS
LASER-RADIATION HEATING
PLASMA HEATING
RADIATIONS
TARGETS
ULTRAVIOLET RADIATION