ICRF antenna designs for CIT and Alcator C-Mod
An ion cyclotron range of frequencies (ICRF) launcher for the Compact Ignition Tokamak (CIT) has been designed. This launcher incorporates four current straps in a 2 /times/ 2 configuration. The current straps consist of end-fed loops that are grounded in the middle. An antenna similar in geometry, size, and feed configuration to a single strap of the CIT launcher will be built for use on Alcator C-Mod. The design must provide maximum power levels of 4 MW/port for CIT and 2 MW/port for C-Mod, pulse lengths of 5--10 s for CIT and 1 s for C-Mod, and power densities up to 2 kW/cm/sup 2/. The design uses a Faraday shield consisting of Inconel rods with mechanically attached graphite tiles; the shield and the current strap are cooled by radiating to a gas-cooled backplane. A feed configuration compatible with the end-fed antenna design has been developed and features tunability in three bands in the range 65--130 MHz. It uses an external resonant loop with integral tuning elements. It has been designed to maximize power handling capabilities, minimize space requirements, and facilitate remote handling. 1 ref., 6 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6265773
- Report Number(s):
- CONF-8905120-4; ON: DE89011579
- Country of Publication:
- United States
- Language:
- English
Similar Records
The ORNL fast wave ICRF (Ion Cyclotron Range of Frequencies) antenna for Alcator C-Mod
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