Producing Persistent, High-Current, High-Duty-Factor H- Beams for Routine 1 MW Operation of SNS

Conference · Sun Jan 01 00:00:00 EST 2012

OSTI ID:1056921

Stockli, Martin P ^[1]; Han, Baoxi ^[1]; Hardek, Thomas W ^[1]; Kang, Yoon W ^[1]; Murray, Jr, S N ^[1]; Pennisi, Terry R ^[1]; Piller, Chip ^[1]; Santana, Manuel ^[1]; Welton, Robert F ^[1]

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1. ORNL

Since 2009, SNS has been producing neutrons with ion beam powers near 1 MW, which requires the extraction of ~50 mA H- ions from the ion source with a ~5% duty factor. The 50 mA are achieved after an initial dose of ~3 mg of Cs and heating the Cs collar to ~170 C. The 50 mA normally persist for the entire 4-week source service cycles. Fundamental processes are reviewed to elucidate the persistence of the SNS H- beams without a steady feed of Cs and why the Cs collar temperature may have to be kept near 170 C.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1056921
• Resource Relation: Conference: 14th International Conference on Ion Sources, Giardini Naxos, Italy, 20111212, 20111216
• Country of Publication: United States
• Language: English

Related Subjects

Cesium
H- ions
ion source
RF ion source
multicusp ion source