Fast Wave Current Drive in the PLT

Calculation of coupling to slow and fast waves in the LHRF from phased waveguide arrays

“…In the next example, we consider coupling from a fast wave array. We model the array to be used for the PLT fast wave current drive experiment [16]: twelve guides driven at 800 MHz, each 8.6 cm in the toroidal direction by 5.4 cm in the poloidal direction, arrayed in four columns of three. The septum between the guides toroidally is 0.67 cm, and the poloidal separation is 2.9 cm.…”

“…This method has been implemented to treat coupling from a single large waveguide to the plasma for the Ion Cyclotron Range of Frequencies (ICRF) [15]. In the present work, we implement this method for the LHRF and use the resulting code to study waveguide array-plasma coupling using an array designed for a fast wave current drive experiment [16].…”