Upgrade of repetitive fast-heating fusion driver HAMA to implode a shell target by using diode pumped solid state laser

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Mori, Yoshitaka
Sekine, Takashi
Komeda, Osamu
Nishimura, Yasuhiko
Sunahara, Atsushi
Miura, Eisuke
Nakayama, Suisei
Hanayama, Ryohei
Ishii, Katsuhiro
Sato, Nakahiro

Issue Date

2016

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Article

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generation

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Abstract

The HAMA is 1-Hz fast heating fusion driver pumped by a 10 J second-harmonic of diode-pumped Nd:glass laser: KURE-1. We have upgraded HAMA to realize an implosion of spherical shell target by using a remaining fundamental beam from KURE-1. This beam of 6 J/1 Hz is transported to the current counter irradiation system. The resulting beam includes three pulses in sequence: 2.2 J/15 ns and 0.7 J/300 ps for implosion, and 0.5 J/190 fs for heating. We estimate the implosion dynamics from 1-D radiation hydrodynamic code (START 1D). It indicates a possibility of tailored-pulse implosion by optimizing the beam spot sizes of imploding beams on the target surface. This upgrade leads to a demonstration of repetitive implosion and additional heating of a spherical shell target in accordance with a repetition of laser operation and that of a target injection system.

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Yoshitaka MORI et al 2016 J. Phys.: Conf. Ser. 688 012070

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Creative Commons Attribution 3.0 Unported

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1742-6588

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