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A spectroscopic analysis of near solid density plasmas

Published online by Cambridge University Press:  01 July 1999

R. SMITH ,
G.J. TALLENTS ,
S.J. PESTEHE ,
G. HIRST ,
J. LIN ,
S. ROSE  and
M. TAGVIASHVILI
R. SMITH
Affiliation:
Department of Physics, University of Essex, Colchester CO4 3SQ, United Kingdom
G.J. TALLENTS
Affiliation:
Department of Physics, University of Essex, Colchester CO4 3SQ, United Kingdom
S.J. PESTEHE
Affiliation:
Department of Physics, University of Essex, Colchester CO4 3SQ, United Kingdom
G. HIRST
Affiliation:
Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
J. LIN
Affiliation:
Department of Physics, University of Essex, Colchester CO4 3SQ, United Kingdom
S. ROSE
Affiliation:
Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
M. TAGVIASHVILI
Affiliation:
Department of Physics, University of Essex, Colchester CO4 3SQ, United Kingdom
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Abstract

Targets of thin (0.1 μm) Al buried beneath 0.1 μm plastic overlay have been irradiated by the 350 fs CPA pulse from the 248 nm Titania KrF laser at irradiances of 1017 W/cm2. We report a study of the radiative properties of the Al plasma using X-ray emission spectroscopy. It is demonstrated that short-pulse irradiation of buried-layer targets can produce a plasma with close to solid densities and electron temperatures of several hundred eV. We examine the effect that a long duration (5–50 ns) low intensity (∼5 × 108 W/cm2) prepulse has on the measured values of electron density and temperature. The experimental technique will allow the determination of the accuracy of LTE radiative calculations in this new regime of extremely high material energy density.

Type
Research Article
Information
Laser and Particle Beams , Volume 17 , Issue 3 , July 1999 , pp. 477 - 485
Copyright
1999 Cambridge University Press

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