Propagation of intense laser pulses in strongly magnetized plasmas

Yang, X. H.; Yu, Wei; Xu, Han; Yu, M. Y.; Ge, Z. Y.; Xu, Binbin; Zhuo, H. B.; Y., Y.; Shao, F. Q.; Borghesi, M.

doi:10.1063/1.4922228

Cited by 30 publications

(21 citation statements)

References 36 publications

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“…The most important feature is no cutoff density for the whistler waves. Whistler waves can propagate inside of any density plasmas unless they encounter a strong density gradient so that they interact directly even with overdense plasmas [20][21][22]. Another critical fact is that a large electromotive potential, or an electrostatic potential, in the * sano@ile.osaka-u.ac.jp longitudinal direction appears in the standing wave of whistler-mode.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast wave-particle energy transfer in the collapse of standing whistler waves

et al. 2019

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Efficient energy transfer from electromagnetic waves to ions has been demanded to control laboratory plasmas for various applications and could be useful to understand the nature of space and astrophysical plasmas. However, there exists a severe unsolved problem that most of the wave energy is converted quickly to electrons, but not to ions. Here, an energy conversion process to ions in overdense plasmas associated with whistler waves is investigated by numerical simulations and theoretical model. Whistler waves propagating along a magnetic field in space and laboratories often form the standing waves by the collision of counter-propagating waves or through the reflection. We find that ions in the standing whistler waves acquire a large amount of energy directly from the waves in a short timescale comparable to the wave oscillation period. Thermalized ion temperature increases in proportion to the square of the wave amplitude and becomes much higher than the electron temperature in a wide range of wave-plasma conditions. This efficient ion-heating mechanism applies to various plasma phenomena in space physics and fusion energy sciences.

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Section: Introductionmentioning

confidence: 99%

“…(b) corresponds to a tokamak 10 18 -1020 3 × 10 16 -10 18 3 × 10 10 -10 12 3 × 10 −4 -10 −10 21 -10 23 2 × 10 19 -1021 2 × 10 13 -10 15 0.2-10 ne0/nc 2-100 Application glass & TiSap laser CO2 laser tokamak planetary magnetosphere TABLE I. Characteristic physical quantities for the thermal ion-plasma generation over 10 keV.…”

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confidence: 99%

Ultrafast wave-particle energy transfer in the collapse of standing whistler waves

et al. 2019

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“…Laser plasma interaction in such a field condition is now attracting much attention [6][7][8][9]. Existence of a strong field affects the lasergenerated high energy density plasmas by microscopic energy transport and turbulence [10,11] as well as by macroscopic hydrodyanmics and instabilities [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Broadening of cyclotron resonance conditions in the relativistic interaction of an intense laser with overdense plasmas

et al. 2017

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The interaction of dense plasmas with an intense laser under a strong external magnetic field has been investigated. When the cyclotron frequency for the ambient magnetic field is higher than the laser frequency, the laser's electromagnetic field is converted to the whistler mode that propagates along the field line. Because of the nature of the whistler wave, the laser light penetrates into dense plasmas with no cutoff density, and produces superthermal electrons through cyclotron resonance. It is found that the cyclotron resonance absorption occurs effectively under the broadened conditions, or a wider range of the external field, which is caused by the presence of relativistic electrons accelerated by the laser field. The upper limit of the ambient field for the resonance increases in proportion to the square root of the relativistic laser intensity. The propagation of a large-amplitude whistler wave could raise the possibility for plasma heating and particle acceleration deep inside dense plasmas.

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“…In this case, a right-hand circularly polarized (RHCP) laser can propagate deep into an overdense plasma along an intense embedded magnetic field without encountering cutoff or resonance. 25,26 Moreover, transmission of RHCP laser into dense plasma can be controlled by an intense magnetic pulse in the plasma. 27 In this Letter, we propose a scheme for trapping intense light in a hollow shell of high density plasma by sending a RHCP laser light pulse through a strongly magnetized slab that serves as a transparent trap door.…”

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confidence: 99%

“…For magnetized plasma with the external magnetic field B 0 (normalized by m e cx L =e) along the laser propagation direction, the dielectric constant can be written as e B ¼ 1 À n e = 1 6 B 0 ðÞ , 25,26 where the plus and minus signs correspond to the so-called L and R waves, respectively. 25 Thus, for the R wave e B is always larger than unity if B 0 > 1, so that the plasma is transparent at any density.…”

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confidence: 99%