Experimental study of ablation pressures and target velocities obtained in 0. 26. mu. m wavelength laser experiments in planar geometry

Journal Article · Fri Nov 01 04:00:00 EST 1985 · Phys. Fluids; (United States)

OSTI ID:5141739

Fabbro, R; Faral, B; Virmont, J; Cottet, F; Romain, J P; Pepin, H

In 0.26 ..mu..m wavelength laser experiments that were performed in planar geometry with irradiances between 10/sup 13/ and 10/sup 15/ W/cm/sup 2/, the ablation pressure and the target velocity have been measured using a shock-velocity measurement and the double foil technique, respectively. The conditions are discussed that must be satisfied if the double-foil technique is to give an accurate measurement of the velocity of the dense part of the target. The rocket model has also been improved using a time-dependent applied pressure pulse, in order to accurately describe the relation between ablation pressure, target velocity, and ablated fraction. Pressures up to 50 Mbar have been easily generated since lateral energy transport is rather low with a 0.26 ..mu..m wavelength laser.

• Research Organization: Laboratoire P.M.I., Ecole Polytechnique, 91128 Palaiseau Cedex, France
• OSTI ID: 5141739
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 28:11; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ABLATION
ELECTROMAGNETIC RADIATION
LASER-PRODUCED PLASMA
PLASMA
PLASMA PRESSURE
RADIATIONS
SHOCK WAVES
TARGETS
VELOCITY
VISIBLE RADIATION