Experimental study of laser acceleration of planar targets at the wavelength 0. 26. mu. m

Journal Article · Sat Dec 01 04:00:00 EST 1984 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.333884· OSTI ID:6294755

Fabbro, R; Faral, B; Cottet, F; Romain, J P

The main characteristics of accelerated aluminum targets, which are the target velocity, the uniformity of the acceleration and the backside temperature have been studied in laser experiments performed at wavelength 0.26 ..mu..m with an absorbed flux of a few 10/sup 13/ W/cm/sup 2/, in 400-ps pulse duration by using the double-foil technique and an optical pyrometry diagnostic: The ablation pressure was inferred from the velocity measurements. The uniformity of the acceleration was shown to be controlled by the hot spots in the focal spot, and the importance of studying the smoothing of laser inhomogeneities for accelerated targets with large ablated fractions was emphasized. The observed dependence of the backside temperature as a function of the initial foil thickness is discussed in the light of shock wave heating and radiative heating.

• Research Organization: Laboratoire de Physique des Milieux Ionises, Ecole Polytechnique, 91128 Palaiseau Cedex, France
• OSTI ID: 6294755
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 56:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ABLATION
ACCELERATION
ALUMINIUM
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
HEATING
HOT SPOTS
LASER TARGETS
LASER-PRODUCED PLASMA
LASER-RADIATION HEATING
METALS
PLASMA
PLASMA HEATING
RADIATIONS
SHOCK WAVES
TARGETS
TEMPERATURE DEPENDENCE
THICKNESS
ULTRAVIOLET RADIATION
VELOCITY