Enhancement of H− production in an rf-driven multicusp source
- 1 April 1993
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 64 (4) , 970-973
- https://doi.org/10.1063/1.1144152
Abstract
An rf‐driven multicusp source has been operated in pulsed mode to generate H− ions that are formed by volume processes. A total H− current of approximately 40 mA has been extracted from a 5.6‐mm‐diam aperture with rf input power higher than 50 kW. Attempts have been made to enhance the H− beam current by introducing a small quantity of cesium vapor into the source chamber. It is found that the H− output current can be increased by a factor larger than 3 if some cesium is applied in the collar around the exit aperture. Electron current can be reduced by cesium deposition on the chamber walls. A simple cesium delivery system fabricated from small dispensers has been operated very successfully with the clean rf induction discharge.Keywords
This publication has 3 references indexed in Scilit:
- H− enhancement process in a multicusp ion source operated with a barium insert structureApplied Physics Letters, 1991
- rf driven multicusp H− ion sourceReview of Scientific Instruments, 1991
- Optimization of H− production from a small multicusp ion sourceReview of Scientific Instruments, 1989