Watanabe, Osamu; Ko, Yongtae; Tsujii, Naoto; Takase, Y.; … - 2022
A novel “finline” antenna was designed to excite lower-hybrid waves (LHWs) for plasma current drive at 2.45 GHz in the TST-2 spherical tokamak. A periodic fin array acts as a transmission line for electromagnetic surface waves. Cold tests confirmed propagation of the electromagnetic surface...