Enhancement of H− production in a multicusp source by cold electron injection
- 1 March 1986
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 57 (3), 321-324
- https://doi.org/10.1063/1.1138938
Abstract
The effect on H− production by injecting primary electrons with different energies into the three regions of a magnetically filtered multicusp source has been investigated. A substantial increase in H− yield occurs only when very low‐energy electrons (E≊1 eV) are added to the plasma in the filter or extraction chamber region. The measured increases were about 50% and 25%, respectively. This increase may indicate that the H− ions are formed by dissociative attachment of vibrationally excited H2. In that case, the low‐energy electron injection scheme could maintain a low average H− ion energy which in turn could improve the brightness of the extracted beam.Keywords
This publication has 16 references indexed in Scilit:
- Effect of wall material on H− production in a multicusp sourceApplied Physics Letters, 1985
- Optimization of H− production in a magnetically filtered multicusp sourceReview of Scientific Instruments, 1985
- Extraction of H− beams from a magnetically filtered multicusp sourceReview of Scientific Instruments, 1984
- Extraction of volume-produced H− ions from a multicusp sourceReview of Scientific Instruments, 1983
- A mass spectrometer for analyzing hydrogen-ion speciesPublished by AIP Publishing ,1979
- Some characteristics of tungsten filaments operated as cathodes in a gas dischargeReview of Scientific Instruments, 1979
- Increasing the ion beam current from a multidipole sourceApplied Physics Letters, 1977
- Plasma electron heating by injection of low-energy electronsApplied Physics Letters, 1975
- Optimization of permanent magnet plasma confinementPhysics Letters A, 1975
- Intense, mixed-energy hydrogen beams for CTR injectionNuclear Fusion, 1975