Fast ion collective Thomson scattering, JET results and TEXTOR plans

Diagnosis of MeV range fast ions by collective Thomson scattering (CTS) of millimetre waves was successfully demonstrated at JET. Building on the experiences from JET, a new millimetre wave based CTS fast ion diagnostic is being built for the TEXTOR tokamak. With this we intend to address both generic issues of energetic ion dynamics and specific issues for ion cyclotron resonance heating.