Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4905003
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Funding
- China Scholarship Council
- U.S. Department of Energy [DE-AC02-05CH11231]
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Past research has revealed the propagation of dense, asymmetric ionization zones in both high and low current magnetron discharges. Here, we report about the direction reversal of ionization zone propagation as observed with fast cameras. At high currents, zones move in the E x B direction with velocities of 10(3)-10(4) m/s. However, at lower currents, ionization zones are observed to move in the opposite, the -E x B direction, with velocities -10(3) m/s. It is proposed that the direction reversal is associated with the local balance of ionization and supply of neutrals in the ionization zone. (C) 2014 AIP Publishing LLC.
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