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Generation and confinement of high energy electrons generated by irradiation of ultra-intense short laser pulses onto cone targets

Published online by Cambridge University Press:  06 May 2008

T. Nakamura*
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
K. Mima
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
H. Sakagami
Affiliation:
Theory and Computer Simulation Center, National Institute for Fusion Science, Toki, Japan
T. Johzaki
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
H. Nagatomo
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
*
Address correspondence and reprint requests to: Tatsufumi Nakamura, Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan. E-mail: nakamura@ile.osaka-u.ac.jp

Abstract

Interactions of cone targets with different shapes with laser pulses are studied numerically. Two important parameters which characterize the laser-cone interaction in 2006 are introduced, which are cone angle and ratio of laser spot and cone tip. By changing these two parameters, energy coupling from laser to electrons is controlled. Some fraction of high energy electrons generated at side wall and cone tip are not freely propagating out from the target, but confined around the cone tip due to the disturbed electric field.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2008

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