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Laser absorption and fast electron transport in deformed targets

Published online by Cambridge University Press:  09 April 2001

A. MACCHI ,
H. RUHL  and
F. CORNOLTI
A. MACCHI
Affiliation:
Theoretische Quantenelektronik, TU-Darmstadt, Hochschulstr. 4A, D-64289 Darmstadt, Germany Dipartimento di Fisica dell'Universitá di Pisa, Piazza Torricelli 2, I-56127 Pisa, Italy Also INFM, sezione A, Universitá di Pisa, Italy
H. RUHL
Affiliation:
Theoretische Quantenelektronik, TU-Darmstadt, Hochschulstr. 4A, D-64289 Darmstadt, Germany
F. CORNOLTI
Affiliation:
Dipartimento di Fisica dell'Universitá di Pisa, Piazza Torricelli 2, I-56127 Pisa, Italy
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Abstract

The effect of surface deformations on laser absorption and transport in overdense plasma targets is investigated with 2D Vlasov simulations. Fractional absorption increases strongly with the deformation depth and scales weakly with density or intensity. Fast electrons generated in the skin layer have high tangential velocity directed toward the deformation center. In the case of a single, smooth deformation, they may be collimated by magnetic fields into a single jet which penetrates deeply into the plasma. Small-scale surface corrugations are able to destroy the collimation of a single jet leading to multiple jets or diffuse electron sprays.

Type
ULIA-1 CONFERENCE PAPERS
Information
Laser and Particle Beams , Volume 18 , Issue 3 , July 2000 , pp. 375 - 379
Copyright
© 2000 Cambridge University Press

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