Transient propagation dynamics of flowing plasmas accelerated by radio-frequency electric fields - Archive ouverte HAL
Article Dans Une Revue Physics of Plasmas Année : 2017

Transient propagation dynamics of flowing plasmas accelerated by radio-frequency electric fields

J. Dedrick
  • Fonction : Auteur
Ane Aanesland

Résumé

Flowing plasmas are of significant interest due to their role in astrophysical phenomena and potential applications in magnetic-confined fusion and spacecraft propulsion. The acceleration of a charge-neutral plasma beam using the radio-frequency self-bias concept could be particularly useful for the development of neutralizer-free propulsion sources. However, the mechanisms that lead to space-charge compensation of the exhaust beam are unclear. Here, we spatially and temporally resolve the propagation of electrons in an accelerated plasma beam that is generated using the self-bias concept with phase-resolved optical emission spectroscopy. When combined with measurements of the extraction-grid voltage, ion and electron currents, and plasma potential, the pulsed-periodic propagation of electrons during the interval of sheath collapse at the grids is found to enable the compensation of space charge.

Dates et versions

hal-01895576 , version 1 (15-10-2018)

Identifiants

Citer

J. Dedrick, Andrew Gibson, D.V. Rafalskyi, Ane Aanesland. Transient propagation dynamics of flowing plasmas accelerated by radio-frequency electric fields. Physics of Plasmas, 2017, 24, pp.050703. ⟨10.1063/1.4983059⟩. ⟨hal-01895576⟩
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