Abstract
The results of a series of experiments using fast-waves in the ion cyclotron frequency (ICF) range are presented. A 20 kW and a 100 kW transmitter is used to study fast-wave excitation, propagation and coupling in the 15–30 MHz frequency range under steady-state and pulsed operating conditions. In addition, a broadband amplifier is used in the 30–50 MHz frequency range to study propagation at higher harmonics of the ion-cyclotron frequency. An all-metal, Faraday-shielded water-cooled, 120° poloidal angle, loop antenna is used to launch fast-waves at the midplane of an EBT cavity. The present antenna is designed to operate at power levels up to 20 kW for steady-state operation and 100 kW for pulsed operation.
Published Version
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