Ion charge state distributions of pulsed vacuum arcs-interpretation of their temporal development
- 1 February 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Plasma Science
- Vol. 26 (1) , 118-119
- https://doi.org/10.1109/27.659541
Abstract
Ion charge states of vacuum arcs are enhanced at the beginning of each arc pulse. The ion charge states drop with time and become steady-state after about 100 /spl mu/s, with some dependence on the cathode material. A reduction of ion charge states has been observed at the end of each are pulse. In this note it is shown that the charge-state-dependent ion drift velocity in the plasma expansion zone contributes to the effect measured by the time-of-flight method, although it is not solely responsible for it. A quantitative evaluation as well as literature data of other measuring methods prove the physical significance of the effects observed.Keywords
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