Journal ArticleDOI
Experimental study of wavelength dependences of laser-plasma coupling, transport, and ablation processes
Hiroaki Nishimura,Hiroshi Azechi,K. Yamada,Akio Tamura,Y. Inada,F. Matsuoka,M. Hamada,Yoshishige Suzuki,S. Nakai,Chihiro Yamanaka +9 more
TLDR
In this article, the wavelength dependence of the following laser-plasma coupling processes were performed: (1) laser-light absorption, (2) energy transport, and (3) ablation and target acceleration behavior.Abstract:
Experimental studies of the wavelength dependence of the following laser-plasma coupling processes were performed: (1) laser-light absorption, (2) energy transport, and (3) ablation and target-acceleration behavior. At a fixed intensity around ${10}^{14}$ W/${\mathrm{cm}}^{2}$, the ablation process was dominated by heat transport by cold electrons for 0.53-and 1.06-\ensuremath{\mu} m lasers and by hot electrons for a 10.6-\ensuremath{\mu} m laser.read more
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Journal ArticleDOI
Short-pulse laser ablation of solid targets
Carsten Momma,Boris N. Chichkov,Stefan Nolte,Ferdinand von Alvensleben,Andreas Tünnermann,Herbert Welling,B. Wellegehausen +6 more
TL;DR: In this article, the authors studied the effect of sub-picosecond laser radiation on the energy and pulse duration of solid targets irradiated by Ti:sapphire laser radiation in the range of 10 9 − 5 × 10 16 W cm 2.
Journal ArticleDOI
Critical elements of high gain laser fusion
TL;DR: In this paper, progress toward high laser fusion can be measured by a set of five critical elements: (1) the laser-to-fuel coupling efficiency, (2) the cold fuel isentrope, (3) the implosion symmetry, (4) the ablation pressure and (5) the ignition concept.
Journal ArticleDOI
Nonrelativistic collisionless shocks in unmagnetized electron-ion plasmas
Tsunehiko N. Kato,Hideaki Takabe +1 more
TL;DR: In this article, it was shown that the Weibel-mediated collisionless shocks are driven at nonrelativistic propagation speed (0.1c < V < 0.45c) in unmagnetized electron-ion plasmas by performing two-dimensional particle-in-cell simulations.
Journal ArticleDOI
Planar laser-driven ablation: Effect of inhibited electron thermal conduction
TL;DR: In this paper, a model for planar laser-driven ablation, including the effects of inhibited electron thermal conduction, is presented, where localized deposition of laser energy at the critical density surface is assumed.
Journal ArticleDOI
Non-relativistic Collisionless Shocks in Unmagnetized Electron-Ion Plasmas
Tsunehiko N. Kato,Hideaki Takabe +1 more
TL;DR: In this article, it was shown that the Weibel-mediated collisionless shocks are driven at non-relativistic propagation speed (0.1c < V < 0.45c) in unmagnetized electron-ion plasmas by performing two-dimensional particle-in-cell simulations.