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論文

Observation of plasma density dependence of electromagnetic soliton excitation by an intense laser pulse

Sarri, G.*; Kar, S.*; Romagnani, L.*; Bulanov, S. V.; Cecchetti, C. A.*; Galimberti, M.*; Gizzi, L. A.*; Heathcote, R.*; Jung, R.*; Kourakis, I.*; et al.

Physics of Plasmas, 18(8), p.080704_1 - 080704_4, 2011/10

 被引用回数:19 パーセンタイル:67.23(Physics, Fluids & Plasmas)

The experimental evidence of the correlation between the initial electron density of the plasma and electromagnetic soliton excitation at the wake of an intense and short laser pulse is presented. The spatial distribution of the solitons, together with their late time evolution into post-solitons, is found to be dependent upon the background plasma parameters, in agreement with published analytical and numerical findings. The measured temporal evolution and electrostatic field distribution of the structures are consistent with their late time evolution and the occurrence of multiple merging of neighboring post-solitons.

論文

Observation of magnetized soliton remnants in the wake of intense laser pulse propagation through plasmas

Romagnani, L.*; Bigongiari, A.*; Kar, S.*; Bulanov, S. V.; Cecchetti, C. A.*; Esirkepov, T. Z.; Galimberti, M.*; Jung, R.*; Liseykina, T. V.*; Osterholz, J.*; et al.

Physical Review Letters, 105(17), p.175002_1 - 175002_4, 2010/10

 被引用回数:35 パーセンタイル:82.81(Physics, Multidisciplinary)

Slowly evolving, regularly spaced patterns have been observed in proton projection images of plasma channels drilled by intense laser pulses propagating in an ionized gas jet. The analysis suggests the formation of rows of magnetized soliton remnants, with a quasistatic magnetic field associated with vortex like electron currents resembling those of magnetic vortices.

論文

Submicron ionography of nanostructures using a femtosecond- laser-driven-cluster-based source

Faenov, A. Y.; Pikuz, T. A.*; 福田 祐仁; 神門 正城; 小瀧 秀行; 本間 隆之; 川瀬 啓悟; 亀島 敬*; Pirozhkov, A. S.; 余語 覚文; et al.

Applied Physics Letters, 95(10), p.101107_1 - 101107_3, 2009/09

 被引用回数:28 パーセンタイル:73.46(Physics, Applied)

An intense isotropic source of multicharged carbon and oxygen ions with energy above 300 keV and high quantity per shot was obtained by femtosecond Ti:Sa laser irradiation of clusters, produced by expansion of the mixed He and CO$$_{2}$$ gases in a supersonic nozzle. The source was employed for high contrast ionography images with 600 nm spatial resolution. A difference in object thickness of 100 nm was well resolved for both Zr and polymer foils.

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