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Energy transport experiments at Institute of Laser Engineering, Osaka University

Published online by Cambridge University Press:  09 March 2009

K. A. Tanaka ,
Y. Kato ,
S. Nakai ,
H. Shiraga ,
T. Yabe ,
T. Yamanaka ,
T. Endo ,
R. Kodama  and
C. Yamanaka
K. A. Tanaka
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
Y. Kato
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
S. Nakai
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
H. Shiraga
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
T. Yabe
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
T. Yamanaka
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
T. Endo
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
R. Kodama
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan.
C. Yamanaka
Affiliation:
Institute for Laser Technology, Suita, Osaka 565 Japan.
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Abstract

Emissions from the rear side of the targets were temporally resolved by irradiating an ultraviolet (UV) laser on Al and Au thin targets. A difference was clearly observed between the above two targets. Given the fact that absorbed laser energy is converted with a very high efficiency to soft x-rays in a high Z plasma, a characteristic emission peak only observed for Au targets was attributed to the effect of soft x-ray energy transport. The ablation pressures estimated from the emissions indicate that the pressure scaling for Au is close to the one by x-ray radiation rather than by a UV laser. With soft x-ray irradiation, energy transport in A1 foils was also studied. An ablation pressure was estimated by the shock speed.

Type
Research Article
Information
Laser and Particle Beams , Volume 7 , Issue 3 , August 1989 , pp. 495 - 504
Copyright
Copyright © Cambridge University Press 1989

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