Amplification of Electromagnetic Pulses by Photoionized Plasma

Vagin, K. Yu.; Uryupin, S. A.

doi:10.1007/s10946-016-9599-z

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…The distributions of He 1+ and He 2+ electrons correspond to the inner and the outer ring of the distribution in figure 1(c). Although this specific type of EVDF has not been treated in rigorous theoretical analysis, a single ring distribution has been studied analytically using kinetic theory and it is shown to be susceptible to developing kinetic instabilities [5,6,26]. The existence of electrons close to zero transverse velocity suggests that the plasma has already evolved by the end of the laser pulse, due to collective effects.…”

Section: Simulations Of Initial Distribution Functionsmentioning

confidence: 99%

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Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmas

Huang

Zhang

Clayton

et al. 2020

Plasma Phys. Control. Fusion

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Optical-field ionization (OFI) is often used to produce plasmas for myriad laboratory applications. OFI of gases is known to generate electrons that have anisotropic distributions. In this paper we show that at the time of plasma formation the electron velocity distribution functions can be controlled by changing the wavelength and polarization of the pump laser and ionization state of the plasma. Thomson scattering is used to measure the distinct electron velocity distributions of helium plasmas produced by linearly and circularly polarized laser pulses within a few inverse plasma periods after the plasma formation. In both cases, nonthermal and highly anisotropic initial electron distributions are observed that are consistent with expectations from OFI of both He electrons.

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Section: Simulations Of Initial Distribution Functionsmentioning

confidence: 99%

“…These distributions are generally non-thermal and highly anisotropic. Kinetic theory predicts that such plasmas are unstable to kinetic instabilities [2][3][4][5][6]. OFI plasmas are relevant to plasma-based acceleration [7], plasma channel formation [8,9] and recombination x-ray lasers [10].…”

Section: Introductionmentioning

confidence: 99%

Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmas

Huang

Zhang

Clayton

et al. 2020

Plasma Phys. Control. Fusion

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High-frequency waves in plasma formed as a result of tunnel ionization of atoms by circularly polarized radiation

2017

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Electron modes of plasma generated at tunnel ionization of atoms by a circularly polarized radiation

Vagin

Uryupin

2017

Physics of Plasmas

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The collective modes of photoionized plasmas are studied using the model description of electron velocity distribution formed at tunnel ionization of atoms by circularly polarized radiation. The dispersion laws of transverse and approximately longitudinal high-frequency waves propagating at an arbitrary angle to the anisotropy axis of photoelectron distribution are obtained. The dispersion law of potential surface waves is derived. It is shown that the frequency of these waves may be greater than plasma frequency. The aperiodic instability of photoionized plasmas is described.

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Amplification of Electromagnetic Pulses by Photoionized Plasma

Cited by 5 publications

References 20 publications

Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmas

Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmas

High-frequency waves in plasma formed as a result of tunnel ionization of atoms by circularly polarized radiation

Electron modes of plasma generated at tunnel ionization of atoms by a circularly polarized radiation

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