Optimization of a compact multicusp He+ ion source for double-charge-exchanged He- beam
Abstract
Preliminary test bench results to study the beam quality extracted from a compact multicusp He+ ion source for He- beam production are reported. The bench is a part of the beam diagnostic system equipped with energy analyzers, emittance meters, focusing beam optics, an alkali-metal charge-exchange cell, a neutral particle energy analyzer, a double focusing magnetic momentum analyzer, a postaccelerator, and a drift tube. Utilizing the front end of the bench, the transverse emittance and the energy distribution function of a He+ beam extracted from a multi-line-cusp magnetic-field ion source 8cm in diameter and 9cm in length were measured. The results indicated that improvements in both formation of the plasma meniscus and reinforcement of pumping in the extraction region are necessary to produce a higher brightness He+ beam.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- March 2006
- DOI:
- 10.1063/1.2165775
- Bibcode:
- 2006RScI...77cB512S
- Keywords:
-
- 29.25.Ni;
- 07.77.Ka;
- 41.85.Ar;
- 41.85.Qg;
- Ion sources: positive and negative;
- Charged-particle beam sources and detectors;
- Beam extraction beam injection;
- Beam analyzers beam monitors and Faraday cups