H- ion source developments at the SNS

Conference · Mon Dec 31 23:00:00 EST 2007

OSTI ID:1036645

Welton, Robert F ^[1]; Stockli, Martin P ^[1]; Murray, Jr, S N ^[1]; Pennisi, Terry R ^[1]; Han, Baoxi ^[1]; Kang, Yoon W ^[1]; Goulding, Richard Howell ^[1]; Crisp, Danny W ^[1]; Sparks, Dennis O ^[1]; Luciano, Nicholas P ^[1]; Carmichael, Justin R ^[1]

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1. ORNL

The U.S. Spallation Neutron Source (SNS) will require substantially higher average and pulse H- beam currents than can be produced from conventional ion sources such as the base line SNS source. H- currents of 40-50 mA (SNS operations) and 70-100 mA (power upgrade project) with an rms emittance of 0.20-0.35 Pi mm mrad and a ~7% duty factor will be needed. We are therefore investigating several advanced ion source concepts based on RF excitation. First, the performance characteristics of an external antenna source based on an Al2O3 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- ion source will also be presented.

• Research Organization: Oak Ridge National Laboratory (ORNL); Spallation Neutron Source
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1036645
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTENNAS
BEAM CURRENTS
CONFIGURATION
EXCITATION
H-
ION SOURCES
NEUTRON SOURCES
PERFORMANCE
PLASMA
PLASMA GUNS
SPALLATION
ion source