Fundamental emission via wave advection from a collapsing wave packet in electromagnetic strong plasma turbulence

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2787500· OSTI ID:21057408

Jenet, F A; Melatos, A; Robinson, P A ^[1]

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1. Department of Physics and Astronomy, University of Texas at Brownsville, Brownsville, Texas 78520 (United States)

Zakharov simulations of nonlinear wave collapse in continuously driven two-dimensional, electromagnetic strong plasma turbulence with electron thermal speeds v{>=}0.01c show that for v < or approx. 0.1c, dipole radiation occurs near the plasma frequency, mainly near arrest, but for v > or approx. 0.1c, a new mechanism applies in which energy oscillates between trapped Langmuir and transverse modes until collapse is arrested, after which trapped transverse waves are advected into incoherent interpacket turbulence by an expanding annular density well, where they detrap. The multipole structure, Poynting flux, source current, and radiation angular momentum are computed.

• OSTI ID: 21057408
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ADVECTION
ANGULAR MOMENTUM
CURRENTS
DENSITY
DIPOLES
ELECTROMAGNETIC RADIATION
ELECTRONS
EMISSION
LANGMUIR FREQUENCY
NONLINEAR PROBLEMS
PLASMA
PLASMA SIMULATION
TRAPPING
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS
WAVE PACKETS