The effect of laser contrast on generation of highly charged Fe ions by ultra-intense femtosecond laser pulses

Faenov, A. Ya.; Alkhimova, M. A.; Pikuz, T. A.; Skobelev, I. Yu.; Nishiuchi, Mamiko; Sakaki, H.; Pirozhkov, Alexander S.; Sagisaka, A.; Dover, N. P.; Kondo, Kotaro; Fukuda, Yuji; Kiriyama, Hiromitsu; Andreev, Alexander A.; Nishitani, Kazuhiko; Miyahara, Tetsuhiro; Watanabe, Yukinobu; Pikuz, S. A.; Kando, M.; Kodama, R.; Kondo, Kiminori

doi:10.1007/s00340-017-6771-2

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…The hyper satellite structure in a region of characteristic K α emission is observed in the spectra. In [3] it is demonstrated that a laser-based source of highly charged moderate-Z ions can be created only with high-contrast laser pulses. Presence of quite a high prepulse significantly decreases the average degree of ionization in irradiated solid-state target.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Lyα Dielectronic Satellites to Characterize Temporal Profile of Intense Femtosecond Laser Pulses

et al. 2021

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In the paper, an X-ray spectroscopy-based approach on laser pulse temporal profile characterization is described. The structure of dielectronic satellites to H-like Lyα lines strongly depends on a plasma electron density, so it can be applied for diagnostics. These spectral lines are mainly emitted during initial stage of laser plasma expansion. It means that plasma parameters obtained via them characterizes matter conditions in a region surrounding a spot of laser-matter interaction. In the case when a laser contrast is high enough, the radiation interacts with cold matter, which had not been preliminary perturbed by a laser prepulse, and the satellites structure shape corresponding to high densities should be observed. It allows us to consider the satellites as a diagnostic tool for the laser temporal profile quality. In the paper dependencies of the dielectronic satellites structure on electron densities obtained from detailed kinetic calculations in the wide range of plasma parameter for different elements are under discussion. Fundamental theoretical aspects of plasma diagnostic based on the feature of satellite structures shape in hot dense plasma, which led to development of the proposed method, are also explained.

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Section: Introductionmentioning

confidence: 99%

Analysis of Lyα Dielectronic Satellites to Characterize Temporal Profile of Intense Femtosecond Laser Pulses

et al. 2021

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“…At the same time, laser contrast plays a very crucial role in the realization of RPA, especially in the case of a nano-foil target. The preceding pulse, if not properly controlled, can alter and even destroy the initial profile of a target dramatically before the main pulse arrives [17][18][19][20][21], and then affect the following acceleration process. It is known that several useful techniques such as Pockels cell switches, saturable absorbers [22], cross-polarized wave generation [23], etc can be used to improve the laser contrast at the early stage of amplifiers.…”

Section: Introductionmentioning

confidence: 99%

Phase locked multiple rings in the radiation pressure ion acceleration process

Wan¹,

Hua²,

Pai³

et al. 2018

Plasma Phys. Control. Fusion

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Laser contrast plays a crucial role for obtaining high quality ion beams in the radiation pressure ion acceleration (RPA) process. Through one-and two-dimensional particle-in-cell (PIC) simulations, we show that a plasma with a bi-peak density profile can be produced from a thin foil on the effects of a picosecond prepulse, and it can then lead to distinctive modulations in the ion phase space (phase locked double rings) when the main pulse interacts with the target. These fascinating ion dynamics are mainly due to the trapping effect from the ponderomotive potential well of a formed moving standing wave (i.e. the interference between the incoming pulse and the pulse reflected by a slowly moving surface) at nodes, quite different from the standard RPA process. A theoretical model is derived to explain the underlying mechanism, and good agreements have been achieved with PIC simulations.

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Accounting for the instrument function of crystal spectrometers operating in many reflection orders in the diagnostics of laser plasma from its continuum spectrum

Alkhimova¹,

Skobelev²,

Faenov³

et al. 2018

Quantum Electron.

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The effect of laser contrast on generation of highly charged Fe ions by ultra-intense femtosecond laser pulses

Cited by 5 publications

References 22 publications

Analysis of Lyα Dielectronic Satellites to Characterize Temporal Profile of Intense Femtosecond Laser Pulses

Analysis of Lyα Dielectronic Satellites to Characterize Temporal Profile of Intense Femtosecond Laser Pulses

Phase locked multiple rings in the radiation pressure ion acceleration process

Accounting for the instrument function of crystal spectrometers operating in many reflection orders in the diagnostics of laser plasma from its continuum spectrum

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