Key points are not available for this paper at this time.
Deuterium neutral beams with energies up to 110 keV were injected into TFTR (Tokamak Fusion Test Reactor) plasmas at low magnetic field such that the beam injection velocities were comparable to the Alfv\'en velocity. Excitation of toroidal Alfv\'en eigenmodes was observed by Mirnov coils and beam emission spectroscopy.
Wong et al. (Mon,) studied this question.