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Hard x-ray bursts observed in association with Rayleigh-Taylor instigatedcurrent disruption in a solar-relevant lab experiment

Marshall, R S ; Flynn, M J ; Bellan, P M

Physics of plasmas, 2018-11, Vol.25 (11) [Periódico revisado por pares]

Melville: American Institute of Physics

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  • Título:
    Hard x-ray bursts observed in association with Rayleigh-Taylor instigatedcurrent disruption in a solar-relevant lab experiment
  • Autor: Marshall, R S ; Flynn, M J ; Bellan, P M
  • Assuntos: Breaking ; Collisions ; Deceleration ; Disruption ; Electrons ; Lateral stability ; Magnetohydrodynamics ; Mean free path ; Plasma jets ; Subgroups ; Taylor instability ; X ray detectors ; X rays
  • É parte de: Physics of plasmas, 2018-11, Vol.25 (11)
  • Descrição: Measurements by multiple X-ray detectors show transient emission of a 1 μs pulse of non-mono-energetic ∼6 keV X-rays by a cold, denseMHD-driven plasma jet. Because the collision mean free path is much smaller than the jetdimensions, the acceleration of particles to high energy was not expected. The X-ray pulseoccurs when the jet undergoes a kink instability which accelerates the jet laterally sothat a fast-growing secondary Rayleigh-Taylor instability is triggered which then breaksthe jet. The jet breaking is correlated in time with several other fast changingphenomena. It is proposed that despite the short collision mean free path, an inductiveelectric field associated with this breaking accelerates a certain subgroup of electronsto keV energies without any of these electrons undergoing collisions. It is furtherproposed that after being accelerated to high energy, these fast electrons are suddenlydecelerated via collisions and radiate X-rays.
  • Editor: Melville: American Institute of Physics
  • Idioma: Inglês
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