Design of a Lower Hybrid Antenna for Current Drive Experiments on MST
Journal Article
·
· review of scientific instruments
OSTI ID:783596
RF current drive has been proposed as a mechanism for reducing the tearing fluctuations that are responsible for anomalous energy transport in the RFP. To this end, a system for launching lower hybrid slow waves at 800MHz and n = 7.5 has been designed and implemented in MST. The antenna is an enclosed interdigital line using 1/4 wavelength resonators with an opening in the cavity through which the wave is coupled to the plasma. The power handling capability of the present antenna design has been investigated. Presently, the power handling the antenna begins to reflect nearly all the launched power is {approx} 3 kW. A boron nitride limiter assembly was added to the antenna and resulted in only a slight increase in the observed power limit. The antenna has been removed from the vacuum vessel and an inspection revealed no signs of damage after 16 months of operation inside of MST.
- Research Organization:
- University of Wisconsin-Madison (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- FG02-96ER54345
- OSTI ID:
- 783596
- Report Number(s):
- DOE/ER54345-347
- Journal Information:
- review of scientific instruments, Journal Name: review of scientific instruments
- Country of Publication:
- United States
- Language:
- English
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