Lower Hybrid Antenna Design for MST

Journal Article · Mon Sep 26 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2098249· OSTI ID:20726336

Goetz, J A; Thomas, M A; Kaufman, M C; Oliva, S P ^[1]

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1. Department of Physics, University of Wisconsin, Madison, WI 53706 (United States)

Inter-digital line antennas are being used to test the feasibility of lower hybrid current drive in MST. The antennas use {lambda}/4 resonators and launch slow waves at 800 MHz with n parallel {approx} 7.5. Routine operation has been achieved with a good impedance match between antenna and plasma. High power antenna design improvements include larger vacuum feed-throughs, better impedance matching, and rf instrumentation on all resonators. The antenna and feed-through modeling was performed with CST Microwave Studio{sup TM}. The pulse-forming network that powers the klystron is being upgraded to a 50 kV - 30 ms pulse. The goal for the LHCD system on MST is a modular design that can handle 300 kW per antenna.

• OSTI ID: 20726336
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 787; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
COMPUTERIZED SIMULATION
DESIGN
IMPEDANCE
KLYSTRONS
LOWER HYBRID CURRENT DRIVE
LOWER HYBRID HEATING
MHZ RANGE
MICROWAVE RADIATION
MST DEVICE
PLASMA
PLASMA SIMULATION
PULSES
RESONATORS
REVERSE-FIELD PINCH
RF SYSTEMS