T. S. Bigelow

TL;DR: In this paper, the TFTR edge reflectometer has been relocated to the new Ion Bernstein wave (IBW) antenna to allow better understanding and measurement of these effects, and the results from IBW experiments are presented and contrasted to the edge density modifications previously observed during fast-wave (FW) antenna.

TL;DR: The folded waveguide (FWG) antenna is an advanced ICRF launcher under development at ORNL that offers many significant advantages over current-strap type antennas as mentioned in this paper, particularly beneficial for reactor-relevant applications such as ITER and TPX.

TL;DR: In this paper, the authors showed that the folded waveguide should be capable of coupling several times the power flux of a loop antenna into a tokamak plasma, which is the case with the 80MHz prototype of the FWA.

TL;DR: In this article, a collection of computer codes are used at ORNL to calculate the plasma loading and wave spectrum for a three-dimensional rf antenna, the transmission/reflection properties of the Faraday shield and its effect on the electrical characteristics and phase velocity of the antenna, internal coupling among antenna array components and the incorporation of antenna array into a transmission line model of the phase control, tuning, matching, and power distribution system.

TL;DR: In this article, a dual-frequency differential phase reflectometer has been developed for use in ICRF power coupling studies on TFTR, which is optimized for measurements of the electron density profile in the edgegradient region, where density fluctuations are large.