Abstract
Fusion-produced alpha particles with energy 0.7 MeV have been spectroscopically observed in the core of a deuterium-tritium plasma in the TFTR tokamak at alpha densities of 3×1016 m-3. During a sawtooth-free discharge, the measured energy spectra at r/a=0.3 are in good agreement with those predicted on the basis of collisional transport. Time-resolved measurements during the alpha thermalization after alpha source turn-off show decay of the distribution function to lower energies consistent with the classical slowing-down time of 0.5 s.
Original language | English |
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Pages (from-to) | 649-652 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 75 |
Issue number | 4 |
DOIs | |
State | Published - 1995 |