Development of a dc, broad beam, Mevva ion source
We are developing an embodiment of metal vapor vacuum arc (Mevva) ion source which will operate dc and have very large area beam. In preliminary testing, a dc titanium ion beam was formed with a current of approximately 0.6 amperes at an extraction voltage of 9kV (about 18 keV ion energy, by virtue of the ion charge state distribution) and using an 18 cm diameter set of multi-aperture. Separately, we have tested and formed beam from a 50 cm diameter (2000 cm{sub 2}) set of grids using a pulsed plasma gun. This configuration appears to be very efficient in terms of plasma utilization, and we have formed beams with diameter 33 cm (FWHM) and ion current up to 7 amperes at an extraction voltage of 50 kV (about 100 keV mean ion energy) and up to 20 amperes peak at the current overshoot part of the beam pulse. Here we describe this Part Of our Mevva development program and summarize the results obtained to-date.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Department of Defense, Washington, DC (United States); USDOE
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10185006
- Report Number(s):
- LBL-30451; CONF-910943-6; ON: DE92041167; CNN: Contract ARO 116-89
- Resource Relation:
- Journal Volume: 63; Journal Issue: 4; Conference: 4. international conference on ion sources, Bensheim (Germany), 30 Sep - 4 Oct 1991
- Country of Publication:
- United States
- Language:
- English
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