Self-Generated Magnetic Fields in the Microwave Plasma Resonant Interaction

DiVergilio, W. F.; Wong, A. Y.; Kim, H. C.; Lee, Y. C.

doi:10.1103/physrevlett.38.541

Cited by 62 publications

(5 citation statements)

References 8 publications

(3 reference statements)

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“…This result is well known in plasma physics and electrodynamics of continuous media as the inverse Faraday effect The corresponding steady magnetic field generated by waves in plasma are observed in experiments via the optical Faraday rotation and other methods [76][77][78].…”

Section: Direct Electric Current and Magnetization Associated With Th...mentioning

confidence: 65%

Momentum, angular momentum, and spin of waves in an isotropic collisionless plasma

Bliokh,

Bliokh

2022

Preprint

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We examine the momentum and angular momentum (including spin) properties of linear waves, both longitudinal (Langmuir) and transverse (electromagnetic), in an isotropic nonrelativistic collisionless electron plasma. We focus on conserved quantities associated with the translational and rotational invariance of the wave fields with respect to the homogeneous medium; these are sometimes called pseudo-momenta. There are two types of the momentum and angular momentum densities: (i) the kinetic ones associated with the energy flux density and the symmetrized (Belinfante) energy-momentum tensor and (ii) the canonical ones associated with the conserved Noether currents and canonical energy-momentum tensor. We find that the canonical momentum and spin densities of Langmuir waves are similar to those of sound waves in fluids or gases; they are expressed via the electron velocity field. In turn, the momentum and spin densities of electromagnetic waves can be written either in the forms known for free-space electromagnetic fields, involving only the electric field, or in the dual-symmetric forms involving both electric and magnetic fields, as well as the effective permittivity of plasma. We derive these properties both within the phenomenological macroscopic approach and microscopic Lagrangian field theory for the coupled electromagnetic fields and electrons. Finally, we explore implications of the canonical momentum and spin densities in transport and electrodynamic phenomena: the Stokes drift, the wave-induced magnetization (inverse Faraday effect), etc.We derive both the kinetic and canonical (pseudo-

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Section: Direct Electric Current and Magnetization Associated With Th...mentioning

confidence: 65%

Momentum, angular momentum, and spin of waves in an isotropic collisionless plasma

Bliokh,

Bliokh

2022

Preprint

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“…[1][2][3][4][5][6][7] Some of the observed consequences are generation of high-energy electron bunches, 1,2 excitation of temporal plasma-wave echoes in the ion wave regime, 3 excitation of ion-wave wakefield, 4 large amplitude electron plasma waves (EPW) based plasma accelerators, 5,6 and self-generation of magnetic fields. 7 The propagation of electromagnetic (em) waves through temporally growing plasmas has also been analyzed, mainly in theory, [8][9][10] including the study of dynamic behavior of microwaves through a gaseous medium that get ionized in the incident wave field. 10 It is shown that the waves can propagate through plasmas that are overdense in the steadystate approximation.…”

Section: Introductionmentioning

confidence: 99%

Observation of electron plasma waves inside large amplitude electromagnetic pulses in a temporally growing plasma

Pandey¹,

Bhattacharjee²,

Sahu³

2012

Physics of Plasmas

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Observation of electron plasma waves excited inside high power ($10 kW) short pulse ($20 ls) electromagnetic (em) waves interacting with a gaseous medium (argon) in the pressure range 0.2-2.5 mTorr is reported. The waves have long wavelength ($13 cm) and get damped at time scales slower ($3 ls) than the plasma period (0.1-0.3 ls), the energy conveyed to the medium lead to intense ionization (ion density n i $ 10 11 cm À3 and electron temperature T e $ 6-8 eV) and rapid growth of the plasma ($10 5 s À1 ) beyond the waves. Time frequency analysis of the generated oscillations indicate the presence of two principal frequencies centered around 3.8 MHz and 13.0 MHz with a spread Df $ 4 MHz, representing primarily two population of electrons in the plasma wave. The experimental results are in reasonable agreement with a model that considers spatiotemporal forces of the em wave on the medium, space charges and diffusion.

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“…[1][2][3][4][5][6][7][8][9] In addition to these non-linear phenomena, the relativistic ponderomotive force and the relativistic mass reveal in the interaction between intense MW and plasma. A number of non-linear phenomena appear during this interaction, including resonance absorption, frequency upshift, charged particle acceleration, and high-energy super-thermal electron generation.…”

Section: Introductionmentioning

confidence: 99%

“…A number of non-linear phenomena appear during this interaction, including resonance absorption, frequency upshift, charged particle acceleration, and high-energy super-thermal electron generation. [1][2][3][4][5][6][7][8][9] In addition to these non-linear phenomena, the relativistic ponderomotive force and the relativistic mass reveal in the interaction between intense MW and plasma. These two non-linear effects arise when the intensity of the MW beam is sufficiently high.…”

Section: Introductionmentioning

confidence: 99%

Variable density formation by intense microwave beams near the critical density

Hashemzadeh

2018

Contributions to Plasma Physics

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Modification of electron density of an inhomogeneous, unmagnetized plasma by the relativistic ponderomotive force of intense microwave beams near the critical density is studied. Using the Maxwell and fluid equations and taking into account the relativistic mass, relativistic ponderomotive force, linear inhomogeneity for electron temperature, and tangential inhomogeneity for electron density, the non-linear electron density, non-linear dielectric permittivity, and non-linear wave equations are derived. Results show that positive and negative values of 1 and 2 (degree of inhomogeneity of the background electron density and electron temperature, respectively) parameters can affect the electric and magnetic field profiles. In addition, profiles of the non-linear electron density indicate that by decreasing the 1 parameter, the amplitude of the peaks increases near the critical density. For positive values of the 2 parameter, by increasing this parameter the amplitude of the peaks increases, while for negative values of the 2 parameter, by decreasing this parameter the amplitude of the peaks increases. KEYWORDSmicrowave-plasma interaction, plasma inhomogeneity, variable density structure 1

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Self-Generated Magnetic Fields in the Microwave Plasma Resonant Interaction

Cited by 62 publications

References 8 publications

Momentum, angular momentum, and spin of waves in an isotropic collisionless plasma

Momentum, angular momentum, and spin of waves in an isotropic collisionless plasma

Observation of electron plasma waves inside large amplitude electromagnetic pulses in a temporally growing plasma

Variable density formation by intense microwave beams near the critical density

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