H{sup -} ion source developments at the SNS

Journal Article · Thu Feb 14 23:00:00 EST 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2816937· OSTI ID:21123723

Welton, R F; Stockli, M P; Murray, S N; Pennisi, T R; Han, B; Kang, Y; Goulding, R H; Crisp, D W; Sparks, D O; Luciano, N P; Carmichael, J R; Carr, J ^[1]

---

1. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471 (United States)

The U.S. Spallation Neutron Source (SNS) will require substantially higher average and pulse H{sup -} beam currents than can be produced from conventional ion sources such as the base line SNS source. H{sup -} currents of 40-50 mA (SNS operations) and 70-100 mA (power upgrade project) with a rms emittance of 0.20-0.35{pi} mm mrad and a {approx}7% duty factor will be needed. We are therefore investigating several advanced ion source concepts based on rf plasma excitation. First, the performance characteristics of an external antenna source based on an Al{sub 2}O{sub 3} plasma chamber combined with an external multicusp magnetic configuration, an elemental Cs system, and plasma gun will be discussed. Second, the first plasma measurements of a helicon-driven H{sup -} ion source will also be presented.

• OSTI ID: 21123723
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 79; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM OXIDES
ANTENNAS
BEAM CURRENTS
CONFIGURATION
EXCITATION
HYDROGEN IONS 1 MINUS
ION SOURCES
NEUTRON SOURCES
PERFORMANCE
PLASMA
PLASMA DIAGNOSTICS
PLASMA GUNS
PULSES
SPALLATION