Tritium particle transport experiments on TFTR during D-T operation.

The {ital t}({ital d},{ital n}){alpha} and {ital d}({ital d},{ital n}){sup 3}He neutron emissivity profiles are measured in a deuterium neutral-beam--heated plasma where a small amount of tritium (T) gas has been puffed. The tritium density is inferred from the neutron emissivities, and transport coefficients ({ital D},{ital V}) are determined. The particle diffusivities of T and {sup 4}He and the thermal diffusivity are similar in magnitude and profile shape. The convective velocity is small for {ital r}/{ital a}{lt}0.6, and is anomalous for {ital r}/{ital a}{gt}0.6. These are the first measurements of {ital D} and {ital V} for a hydrogen isotope in a tokamak plasma.