Picosecond snapshot imaging of electric fields induced on a cone guide target designed for fast ignition scenario

Shi, Binghe; Yogo, Akifumi; Okamoto, Ken‐ichi; Golovin, D.; Mirfayzi, S. R.; Morace, A.; Arikawa, Yasunobu; Yamanoi, Kohei; Abe, Yuki; Murakami, M.; Gu, Y. J.; Mima, Kunioki; Sentoku, Y.; Nakai, M.; Nishimura, Hiroyuki; Shiraga, H.; Fujioka, Shinsuke; Johzaki, Tomoyuki; Iwamoto, A.; Sakagami, Hiroyuki; Kodama, R.

doi:10.1017/s0022377822000599

Cited by 2 publications

(2 citation statements)

References 23 publications

(49 reference statements)

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“…Ion acceleration 1,2) using high-power lasers has attracted significant interest from many researchers due to its features of high flux and short pulse. Ions of several MeV 3,4) energy have been accelerated, and there are many applications 5) of these laser ions, including proton radiography 6) and ion cancer therapy. 7) Ion acceleration is of importance for laserdriven neutron sources (LDNSs), [8][9][10][11][12][13] which can be used for various applications, such as nondestructive analysis of materials [14][15][16][17] and the production of medical radioisotopes.…”

Section: Introductionmentioning

confidence: 99%

Cryogenic solid deuterium target formation to realize highly pure deuteron acceleration by high-intensity laser

Wei,

Iwamoto,

Lan

et al. 2024

Jpn. J. Appl. Phys.

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In recent years, laser driven neutron sources (LDNSs) have attracted the attention for their applications such as nondestructive analysis and production of medical radioisotopes. One of the efficient neutron production methods is the use of the 9Be(d, n)10B reaction on a beryllium target with deuterons accelerated by laser-plasma interactions because this is an exothermic reaction. For efficient deuteron acceleration, we have developed a formation system for solid deuterium targets. A millimeter thick solid deuterium target can be formed with the system. Before laser shot, the solid deuterium target in the laser chamber can be mechanically moved to the laser irradiation point. We have demonstrated deuteron acceleration by the LFEX laser, and a highly-pure deuteron pulse with energies of up to 6.2MeV was measured with a Thomson parabola ion spectrometer.

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Section: Introductionmentioning

confidence: 99%

Cryogenic solid deuterium target formation to realize highly pure deuteron acceleration by high-intensity laser

Wei,

Iwamoto,

Lan

et al. 2024

Jpn. J. Appl. Phys.

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“…In the context of PFI and isochoric heating applications, a hemisphere-cone geometry has been explored [23]. The fast electrons establish a transient radial focusing field within a cone region attached to the laser-irradiated hemisphere, which acts on the protons travelling within it [29][30][31][32]. Recently, focusing has also been reported using a closed conical target (irradiated by the 1.25 kJ, 10 ps Omega EP laser with a moderate laser intensity of 4 × 10 18 Wcm −2 ) [33], with focusing diagnosed via copper K α emission from a secondary foil target at the end of the cone.…”

Section: Introductionmentioning

confidence: 99%

Geometry effects on energy selective focusing of laser-driven protons with open and closed hemisphere-cone targets

King,

Higginson,

McGuffey

et al. 2023

Plasma Phys. Control. Fusion

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Relativistically intense laser light interacting with solid density targets can accelerate protons to multi-MeV energies via the target normal sheath acceleration process. The use of hollow hemisphere targets with a hollow conical region to focus protons of selected energies, for applications such as isochoric heating of matter and for the fast ignition approach to inertial confinement fusion, is explored for laser intensity ∼ 10 20 Wcm−2. Specifically, the effects of having the cone tip open or closed is investigated experimentally and via a programme of scaled particle-in-cell simulations. The open cone configuration is found to result in proton focusing in the energy range of 9 to 24 MeV, and produce an annular profile for higher energy components, up to 55 MeV, while the spatial distribution of lower energy components remains unchanged. By contrast, for the closed cone case, the focusing effect is diminished by the fields present on the inner wall of the cone tip. Simulations reveal that strong electrostatic and magnetic fields present on the inner surfaces of the target induce the focusing effect with the open cone, but also result in proton divergence in the case of the closed cone. Additionally, the simulations demonstrate the possibility to tailor the cone geometry to select the energy range over which the focusing occurs.

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Picosecond snapshot imaging of electric fields induced on a cone guide target designed for fast ignition scenario

Cited by 2 publications

References 23 publications

Cryogenic solid deuterium target formation to realize highly pure deuteron acceleration by high-intensity laser

Cryogenic solid deuterium target formation to realize highly pure deuteron acceleration by high-intensity laser

Geometry effects on energy selective focusing of laser-driven protons with open and closed hemisphere-cone targets

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