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Simulating the heating of z-pinch plasmas with short laser pulses

Published online by Cambridge University Press:  01 June 2008

S. WIENEKE ,
S. BRÜCKNER  and
W. VIÖL
S. WIENEKE
Affiliation:
University of Applied Sciences and Arts, Von-Ossietzky-Strasse 99, D-37085 Göttingen, Germany ([email protected])
S. BRÜCKNER
Affiliation:
University of Applied Sciences and Arts, Von-Ossietzky-Strasse 99, D-37085 Göttingen, Germany ([email protected])
W. VIÖL
Affiliation:
University of Applied Sciences and Arts, Von-Ossietzky-Strasse 99, D-37085 Göttingen, Germany ([email protected])
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Abstract

The longitudinal heating of a z-pinch plasma with short laser pulses is simulated using COMSOL Multiphysics. The heating of an existing pinch plasma for different electron densities with a short laser pulse is shown. It is illustrated that the initial electron density of the plasma has a significant impact on penetration of the pulse and subsequent heating of the plasma. With a Nd:YAG laser pulse the most effective heating occurs when the initial electron density is about 1/15 of the critical electron density of the plasma. It is shown that by increasing the initial electron density by even a factor of two above this level causes the absorption to increase dramatically, preventing penetration of the laser pulse and greatly limiting the heating of the plasma.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 3 , June 2008 , pp. 361 - 369
Copyright
Copyright © Cambridge University Press 2008

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