Low-energy beam transport studies supporting the Spallation Neutron Source 1-MW beam operationa

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

OSTI ID:1133519

Han, Baoxi ^[1]; Kalvas, T. ^[2]; Tarvainen, O. ^[2]; Welton, Robert F ^[1]; Murray, Jr, S N ^[1]; Pennisi, Terry R ^[1]; Santana, Manuel ^[1]; Stockli, Martin P ^[1]

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1. ORNL
2. University of Jyvaskyla

The H- injector consisting of a cesium enhanced RF-driven ion source and a 2-lens electrostatic low-energy beam transport (LEBT) system supports the Spallation Neutron Source 1-MW beam operation with ~38 mA beam current in the linac at 60 Hz with a pulse length of up to ~1.0 ms. In this work, two important issues associated with the low-energy beam transport are discussed: 1) inconsistent dependence of the post-RFQ beam current on the ion source tilt angle, and 2) high power beam losses on the LEBT electrodes under some off-nominal conditions compromising their reliability.

• 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: 1133519
• Resource Relation: Conference: 14th International Conference on ion Sources, Giardini Naxos, Italy, 20110912, 20110916
• Country of Publication: United States
• Language: English