Computer simulations for rf design of a Spallation Neutron Source external antenna H{sup -} ion source

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3279304· OSTI ID:22053844

Lee, S W; Kang, Y W; Shin, K; Welton, R F ^[1]; Goulding, R H ^[2]

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1. Spallation Neutron Source, ORNL, Oak Ridge, Tennessee 37831 (United States)
2. Fusion Energy Division, ORNL, Oak Ridge, Tennessee 37831 (United States)

Electromagnetic modeling of the multicusp external antenna H{sup -} ion source for the Spallation Neutron Source (SNS) has been performed in order to optimize high-power performance. During development of the SNS external antenna ion source, antenna failures due to high voltage and multicusp magnet holder rf heating concerns under stressful operating conditions led to rf characteristics analysis. In rf simulations, the plasma was modeled as an equivalent lossy metal by defining conductivity as {sigma}. Insulation designs along with material selections such as ferrite and Teflon could be included in the computer simulations to compare antenna gap potentials, surface power dissipations, and input impedance at the operating frequencies, 2 and 13.56 MHz. Further modeling and design improvements are outlined in the conclusion.

• OSTI ID: 22053844
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 81; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
COMPUTERIZED SIMULATION
DESIGN
ELECTRIC POTENTIAL
FERRITE
HEATING
HYDROGEN IONS 1 MINUS
ION SOURCES
MHZ RANGE
NEUTRON SOURCES
PLASMA PRODUCTION
RF SYSTEMS
SPALLATION
TEFLON