High ion charge states in a high-current, short-pulse, vacuum ARC ion sources
Conference
·
OSTI ID:387462
- Lawrence Berkeley National Lab., CA (United States)
Ions of the cathode material are formed at vacuum arc cathode spots and extracted by a grid system. The ion charge states (typically 1-4) depend on the cathode material and only little on the discharge current as long as the current is low. Here the authors report on experiments with short pulses (several {mu}s) and high currents (several kA); this regime of operation is thus approaching a more vacuum spark-like regime. Mean ion charge states of up to 6.2 for tungsten and 3.7 for titanium have been measured, with the corresponding maximum charge states of up to 8+ and 6+, respectively. The results are discussed in terms of Saha calculations and freezing of the charge state distribution.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 387462
- Report Number(s):
- LBNL--38845; CONF-9509356--; ON: DE96014963
- Country of Publication:
- United States
- Language:
- English
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