Electric fields in plasmas under pulsed currents

Details Electric fields in plasmas under pulsed currents Electric fields in plasmas under pulsed currents

2007-06-14

arxiv.org/abs/0706.2023v1

Physics

Plasma Physics

13 pages, 13 figures, submitted to PRE

Scientific paper

10.1103/PhysRevE.76.046401

Electric fields in a plasma that conducts a high-current pulse are measured as a function of time and space. The experiment is performed using a coaxial configuration, in which a current rising to 160 kA in 100 ns is conducted through a plasma that prefills the region between two coaxial electrodes. The electric field is determined using laser spectroscopy and line-shape analysis. Plasma doping allows for 3D spatially resolved measurements. The measured peak magnitude and propagation velocity of the electric field is found to match those of the Hall electric field, inferred from the magnetic-field front propagation measured previously.

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