Mueck, AnjaCurchod, LoïcCamenen, YannStefano, CodaPochelon, AntoinePorte, LaurieVolpe, Francesco2013-03-122013-03-122013-03-12200710.1103/PhysRevLett.98.175004https://infoscience.epfl.ch/handle/20.500.14299/90224WOS:000246803900029The first demonstration of electron-Bernstein-wave heating by double-mode conversion from the O to the X mode in an overdense H-mode tokamak plasma has been achieved in the Tokamak a` Configuration Variable device. This technique overcomes the upper density limit experienced by conventional microwave heating. The sensitive dependence of the O-X mode conversion on the microwave launching direction has been verified experimentally, and localized power deposition consistent with theoretical predictions has been observed at densities well above the conventional cutoff.Electron-Bernstein-Wave HeatingTokamakTCVO-X-B Double-Mode Conversiontext::journal::journal article::research article