Abstract
Magnetic-field effects are known to play an important role in determining current-collection characteristics of electrodes in magnetoplasmas. In the Parker-Murphy model of current collection, for example, the magnetic field excludes electrons that originate from outside a characteristic collection radius from reaching the anode. In this paper we show that these excluded electrons can dominate current collection through ionization effects, even at pressures well below the Paschen threshold for ionization. We demonstrate this by releasing a controlled current near a spherical anode in a magnetic field, and measuring the resultant anode current
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