Hi-rep. Counter-Illumination Fast Ignition Scheme Fusion

Kitagawa, Yoneyoshi; Mori, Yoshitaka; Komeda, Osamu; Ishii, Katsuhiro; Hanayama, Ryohei; Fujita, Kazuhisa; Okihara, S.; Sekine, Takashi; Sato, N.; Kitahara, Takashi; Kawashima, Toshiyuki; Kan, Hirofumi; Nakamura, Naoki; Kondo, Takuya; Fujine, Manabu; Azuma, Hirozumi; Tagaya, Motohiro; Hioki, Tatsumi; Kakeno, Mitsutaka; Nishimura, Yasumasa; Sunahara, A.; Sentoku, Y.

doi:10.1585/pfr.8.3404047

Cited by 10 publications

(7 citation statements)

References 5 publications

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“…The above described system integrations have contributed to repetitive counter-irradiation fast-heating fusion. By irradiating a target consisting of two-parallel doubledeuterated polystyrene foils separated by 100 µm, HAMA succeeded in DD neutron generation by a fast-heating scheme up to 1000/pulses under the optimized condition [5,19]. This is the first demonstration in which a 10 J class DPPSL is used for repetitive ICF experiments.…”

Section: Beam Irradiationmentioning

confidence: 88%

1 Hz fast-heating fusion driver HAMA pumped by a 10 J green diode-pumped solid-state laser

et al. 2013

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A Ti : sapphire laser HAMA pumped by a diode-pumped solid-state laser (DPSSL) is developed to enable a high-repetitive inertial confinement fusion (ICF) experiment to be conducted. To demonstrate a counter-irradiation fast-heating fusion scheme, a 3.8 J, 0.4 ns amplified chirped pulse is divided into four beams: two counter-irradiate a target with intensities of 6 × 1013 W cm−2, and the remaining two are pulse-compressed to 110 fs for heating the imploded target with intensities of 2 × 1017 W cm−2. HAMA contributed to the first demonstration by showing that a 10 J class DPSSL is adaptable to ICF experiments and succeeded in DD neutron generation in the repetition mode. Based on HAMA, we can design and develop an integrated repetitive ICF experiment machine by including target injection and tracking.

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Section: Beam Irradiationmentioning

confidence: 88%

1 Hz fast-heating fusion driver HAMA pumped by a 10 J green diode-pumped solid-state laser

et al. 2013

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“…The remaining issue is the detection of shell motion to synchronize laser illumination timing. In the future, the integrated shell injection systems would be scalable so as to create a unified mini-reactor, CANDY: a concept of kJ fastignition scheme unified machine [39]. Studies discussed in the article have been conducted at room temperature.…”

Section: Discussionmentioning

confidence: 99%

A spherical shell pellet injection system for repetitive laser engagement

et al. 2019

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In laser-driven inertial fusion energy reactors, injected fuel pellets are continuously delivered into the reaction chamber and irradiated by laser beams injected at a frequency of tens of hertz. Thus far, a spherical shell pellet has been confirmed as the most conventional target design to achieve high-energy-density state thorough an implosion process that is required for fusion burn. To demonstrate repetitive fuel implosion with a 1 Hz joule-class laser system, a testbed of a shell injection system delivering a spherical shell (500 m diameter and 7 m thickness) was developed. The developed testbed demonstrated that (i) repetitive implosion (maximum frequency: 0.5 Hz) of shell injection was possible for more than ten shells at a shell speed of 191 mm s−1, and (ii) the distribution of the injected shell after 18 cm free-fall was within a circular region, 6.4 mm in diameter. The estimated laser-hit-ratio to the pellet was on the order of 10%.

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“…Modest deuteron-beam fusion (5 × 10 8 neutrons) was reported [32] but the current studies for proton-driven FI aim mostly at optimizing the energy distribution (especially the maximum energy E p ) and the laser-to-proton energy conversion efficiency (η) in order to match the FI requirements (η > 10%, E p = 10-30 MeV) [33][34][35]. Most impressive results have been recently obtained for electron-driven FI [36].…”

Section: Fimentioning

confidence: 99%