Plasma and Beam Production Experiments with HYBRIS, a Microwave-assisted H- Ion Source

Journal Article · Fri Aug 10 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2773657· OSTI ID:21032649

Keller, R ^[1]; Kwan, J; Regis, M; Wallig, J ^[2]; Hahto, S ^[3]

---

1. Los Alamos Nat. Laboratory, P. O. Box 1663, Los Alamos, NM 87545 (United States)
2. Lawrence Berkeley Nat. Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)
3. SemEquip, Inc., 34 Sullivan Road, North Billerica, MA (United States)

A two-stage ion source concept was presented a few years ago, consisting of a proven H- ion source and a 2.45-GHz Electron Cyclotron-Resonance (ECR) type ion source, here used as a plasma cathode. This paper describes the experimental development path pursued at Lawrence Berkeley National Laboratory, from the early concept to a working unit that produces plasma in both stages and creates a negative particle beam. Without cesiation applied to the second stage, the H- fraction of this beam is very low, yielding 75 micro-amperes of extracted ion beam current at best. The apparent limitations of this approach and envisaged improvements are discussed.

• OSTI ID: 21032649
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 925; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM CURRENTS
BEAM PRODUCTION
CATHODES
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE
HYDROGEN IONS 1 MINUS
ION BEAMS
ION SOURCES
MICROWAVE RADIATION
PARTICLE BEAMS
PLASMA
PLASMA PRODUCTION