Temperature profiles derived from transverse optical shadowgraphy in ultraintense laser plasma interactions at 6×10(20) W cm(-2)

Year: 2009

Authors: Lancaster K.L., Pasley J., Green J.S., Batani D., Baton S., Evans R.G., Gizzi L.A., Heathcote R., Gomez C.H., Koenig M., Koester P., Morace A., Musgrave I., Norreys P.A., Perez F., Waugh J.N., Woolsey N.C.

Autors Affiliation: STFC Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon England;
Univ York, Dept Phys, Heslington YO10 5DD, England;
Univ Milano Bicocca, Dipartimento Fis G Occialini, I-20126 Milan, Italy;
Univ Paris 06, Ecole Polytech,Lab Utilisat Lasers Intenses, UMR 7605, CNRS,CEA, F-91128 Palaiseau, France;
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England;
CNR IPCF, ILIL, I-56124 Pisa, Italy

Abstract: A variety of targets with different dimensions and materials was irradiated using the VULCAN PW laser [C. N. Danson , Nucl. Fusion 44, S239 (2004)]. Using transverse optical shadowgraphy in conjunction with a one-dimensional radiation hydrodynamics code it was possible to determine a longitudinal temperature gradient. It was demonstrated for thick targets with a low Z substrate and a thin higher Z tracer layer at the rear that the boundary between the two materials was Rayleigh-Taylor unstable. By including a simple bubble growth model into the calculations it was possible to correct for the associated behavior with regard to temperature. The resulting temperature gradient was in good agreement with the previously published data using two different methods of determining the temperature.

Journal/Review: PHYSICS OF PLASMAS

Volume: 16 (5)      Pages from: 056707  to: 056707

More Information: Proceedings Paper: 50th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society, Dallas, TX, FEB 01, 2008
KeyWords: plasma diagnostics; plasma temperature; plasma-beam interactions; plasma-wall interactions; Rayleigh-Taylor instability
DOI: 10.1063/1.3133024

Citations: 11
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