Measurements of the³He fusion product in TFTR

The 0.8 MeV 3 He ion created in the d(d,n) 3 He fusion reaction is confined in TFTR and can undergo d( 3 He,p) α fusion reactions. The time evolution and profile of the 14.7 MeV proton emission indicate that collisional energy transfer with plasma electrons is the dominant process influencing the charged 3 He fusion product for TFTR plasmas and that there is no observable anomalous transport. The magnitude of the burnup exceeds classical expectations by a factor of two to three, which is a little beyond experimental uncertainties.