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Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp019s161896q
Title: Spontaneous multi-keV electron generation in a low-RF-power axisymmetric mirror machine
Contributors: Swanson, C.;Cohen, S.A.
U. S. Department of Energy
Keywords: 
Issue Date: May-2019
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Physics of Plasmas
Abstract: Title: Spontaneous multi-keV electron generation in a low-RF-power axisymmetric mirror machine Abstract: X-ray emission shows the existence of multi-keV electrons in low-temperature, low-power, capacitively-coupled RF-heated magnetic-mirror plasmas that also contain a warm (300 eV) minority electron population. Though these warm electrons are initially passing particles, we suggest that collisionless scattering -- mu non-conservation in the static vacuum field -- is responsible for a minority of them to persist in the mirror cell for thousands of transits during which time a fraction are energized to a characteristic temperature of 3 keV, with some electrons reaching energies above 30 keV. A heuristic model of the heating by a Fermi-acceleration-like mechanism is presented, with mu non-conservation in the static vacuum field as an essential feature.
URI: http://arks.princeton.edu/ark:/88435/dsp019s161896q
Appears in Collections:Plasma Science & Technology

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