Hot Electron and Ion Spectra in Axial and Transverse Laser Irradiation in the GXII-LFEX Direct Fast Ignition Experiment

Ozaki, T.; Abe, Yuki; Arikawa, Yasunobu; Okihara, S.; Miura, Eisuke; Sunahara, Atsushi; Ishii, Katsuhiro; Hanayama, Ryohei; Komeda, Osamu; Sentoku, Y.; Iwamoto, A.; Sakagami, Hiroyuki; Johzaki, Tomoyuki; Kawanaka, Junji; Tokita, Shigeki; Miyanaga, Noriaki; Jitsuno, Takahisa; Nakata, Yoshiki; Tsubakimoto, Koji; Mori, Yoshitaka; Kitagawa, Yoneyoshi

doi:10.1585/pfr.16.2404076

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Here, we focus on the results of transverse irradiation [11] by adding the simulation results. The details of the simulation are explained in section 3.1.…”

Section: Introductionmentioning

confidence: 99%

Hot electron and ion spectra on blow-off plasma free target in GXII-LFEX direct fast ignition experiment

et al. 2023

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Polystyrene deuteride shell targets with two holes were imploded by the Gekko XII laser and additionally heated by the LFEX laser in a direct fast ignition experiment. In general, when an ultra-intense laser is injected into a blow-off plasma created by the imploding laser, electrons are generated far from the target core and the energies of electrons increase because the electron acceleration distance has been extended. The blow-off plasma moves not only to the vertical direction but to the lateral direction against the target surface. In a shell target with holes, a lower effective electron temperature can be realized by reducing the inflow of the implosion plasma onto the LFEX path, and high coupling efficiency can be expected. The energies of hot electrons and ions absorbed into the target core were calculated from the energy spectra using three electron energy spectrometers and a neutron time-of-flight measurement system, Mandala. The ions have a large contribution of 74% (electron heating of 4.9 J and ion heating of 14.1 J) to target heating in direct fast ignition.

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“…Here, we focus on the results of transverse irradiation [11] by adding the simulation results. The details of the simulation are explained in section 3.1.…”

Section: Introductionmentioning

confidence: 99%

Hot electron and ion spectra on blow-off plasma free target in GXII-LFEX direct fast ignition experiment

et al. 2023

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Demonstration of a spherical plasma mirror for the counter-propagating kilojoule-class petawatt LFEX laser system

Kojima¹,

Abe

Miura

et al. 2022

Opt. Express

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A counter-propagating laser-beam platform using a spherical plasma mirror was developed for the kilojoule-class petawatt LFEX laser. The temporal and spatial overlaps of the incoming and redirected beams were measured with an optical interferometer and an x-ray pinhole camera. The plasma mirror performance was evaluated by measuring fast electrons, ions, and neutrons generated in the counter-propagating laser interaction with a Cu-doped deuterated film on both sides. The reflectivity and peak intensity were estimated as ∼50% and ∼5 × 1018 W/cm2, respectively. The platform could enable studies of counter-streaming charged particles in high-energy-density plasmas for fundamental and inertial confinement fusion research.

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Hot Electron and Ion Spectra in Axial and Transverse Laser Irradiation in the GXII-LFEX Direct Fast Ignition Experiment

Cited by 2 publications

References 8 publications

Hot electron and ion spectra on blow-off plasma free target in GXII-LFEX direct fast ignition experiment

Hot electron and ion spectra on blow-off plasma free target in GXII-LFEX direct fast ignition experiment

Demonstration of a spherical plasma mirror for the counter-propagating kilojoule-class petawatt LFEX laser system

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