The SNS External Antenna H- Ion Source

Conference · Fri Jan 01 04:00:00 EST 2010

OSTI ID:984756

Welton, Robert F ^[1]; Stockli, Martin P ^[1]; Murray, Jr, S N ^[1]; Crisp, Danny W ^[1]; Carmichael, Justin R ^[1]; Goulding, Richard Howell ^[1]; Han, Baoxi ^[1]; Pennisi, Terry R ^[1]; Santana, Manuel ^[1]

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1. ORNL

The U.S. Spallation Neutron Source (SNS) is an accelerator-based, pulsed neutron-scattering facility, currently in the process of ramping up neutron production. In order to insure that we will meet our operational commitments as well as provide for future facility upgrades with high reliability, we have developed an RF-driven, H- ion source based on a ceramic aluminum nitride (AlN) plasma chamber [1]. This source is expected to be utilized by the SNS for neutron production starting in 2009. This report details the design of the production source which features an AlN plasma chamber, 2-layer external antenna, cooled-multicusp magnet array, Cs2CrO4 cesium system and a Molybdenum plasma ignition gun. Performance of the production source both on the SNS accelerator and SNS test stand is reported. The source has also been designed to accommodate an elemental Cs system with an external reservoir which has demonstrated unanalyzed beam currents up to ~100mA (60Hz, 1ms) on the SNS ion source test stand.

• 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: 984756
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALUMINIUM
ANTENNAS
BEAM CURRENTS
CERAMICS
CESIUM
DESIGN
IGNITION
ION SOURCES
MAGNETS
MOLYBDENUM
NEUTRON SOURCES
NEUTRONS
NITRIDES
PERFORMANCE
PLASMA
PRODUCTION
RELIABILITY
SPALLATION