Next Generation H- Ion Sources for the SNS

Conference · Thu Jan 01 04:00:00 EST 2009

OSTI ID:984754

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

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1. ORNL

The U.S. Spallation Neutron Source (SNS) is the leading accelerator-based, pulsed neutron-scattering facility, currently in the process of ramping up neutron production. In order to insure meeting operational requirements as well as providing for future facility beam power upgrades, a multifaceted H{sup -} ion source development program is ongoing. This work discusses several aspects of this program, specifically the design and first beam measurements of an RF-driven, external antenna H{sup -} ion source based on an AlN ceramic plasma chamber, elemental and chromate Cs-systems, and plasma ignition gun. Unanalyzed beam currents of up to {approx}100 mA (60Hz, 1ms) have been observed and sustained currents >60 mA (60Hz, 1ms) have been demonstrated on the test stand. Accelerated beam currents of {approx}40 mA have also been demonstrated into the SNS front end. Data are also presented describing the first H{sup -} beam extraction experiments from a helicon plasma generator based on the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) engine design.

• 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: 984754
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
ANIONS
ANTENNAS
BEAM CURRENTS
BEAM EXTRACTION
CERAMICS
CHROMATES
DESIGN
ENGINES
IGNITION
ION SOURCES
NEUTRON SOURCES
NEUTRONS
NIBS08-Welton
PLASMA
PRODUCTION
ROCKETS
SPALLATION