Measurement of single mode imprint in laser ablative drive of a thin Al foil by extreme ultraviolet laser radiography
- Clarendon Laboratory, University of Oxford, Oxford OX13PU (United Kingdom)
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
- Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11OQX (United Kingdom)
- School of Mathematics and Physics, Queens University of Belfast, Belfast BT71NN (United Kingdom)
- Department of Physics, University of Essex, Colchester CO43SQ (United Kingdom)
The temporal development of laser driven single mode perturbations in thin Al foils has been measured using extreme ultraviolet (XUV) laser radiography. 15, 30, 70 and 90 {mu}m single modes were imprinted on 2 {mu}m thick Al foils with an optical driver laser at 527 nm for intensities in the range 5{times}10{sup 12} to 1.5{times}10{sup 13}Wcm{sup {minus}2}. The magnitude of the imprinted perturbation at the time of shock break out was determined by fitting to the data estimated curves of growth of the Rayleigh{endash}Taylor instability after shock break out. The efficiency of imprinting is independent of perturbation wavelength in the parameter range of this experiment, suggesting little influence of thermal conduction smoothing. The results are of interest for directly driven inertially confined fusion. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 565797
- Journal Information:
- Physics of Plasmas, Vol. 5, Issue 1; Other Information: PBD: Jan 1998
- Country of Publication:
- United States
- Language:
- English
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