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Collisional Effects on Absorption and Energy Transport in a Dense Solid-Carbon Thin Film Irradiated by Subpicosecond Lasers

Mo CHEN, Daisuke SAITOU and Yasuaki KISHIMOTO

Graduate School of Energy Science, Kyoto University, Gokasyo, Uji, Kyoto 611-0011, Japan

(Received 8 June 2009 / Accepted 2 July 2009 / Published 12 August 2009)

Abstract

The collisional effects on the kinetics of interactions between a high-power subpicosecond laser and a solid-carbon thin film in a fast-ignition scenario are investigated by one-dimensional particle-in-cell simulations. Collisions are found to play an essential role in energy absorption and transport, compared to collisionless cases. In the collisional cases, the absorption at the heating edge, heat transport inside the thin film, and hot electron production are reduced in the early transient process.

Copyright (c) 2009 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

high power laser-matter interaction, collisional effect, absorption rate, heat transport, fast ignition

DOI: 10.1585/pfr.4.040

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This paper may be cited as follows:

Mo CHEN, Daisuke SAITOU and Yasuaki KISHIMOTO, Plasma Fusion Res. 4, 040 (2009).