Large current negative hydrogen ion beam production
- 1 September 1994
- journal article
- letter
- Published by AIP Publishing in Physics of Plasmas
- Vol. 1 (9) , 2813-2815
- https://doi.org/10.1063/1.870519
Abstract
Large current negative hydrogen ions are extracted from a multicusp ion source with an extraction area of 25×44 cm2. By seeding a small amount of cesium vapor into a source chamber, the H− current is enhanced to several times larger than that in a pure hydrogen discharge, accompanied by a reduction of the electron current and the filling gas pressure. A H− current up to 16 A is obtained with a beam energy of 40 keV from 560 extraction holes of 9 mm in diameter each, where the current density is 45 mA/cm2. The H− current increases linearly with the input arc power.Keywords
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