This paper describes charge-exchange measurements of the radial profiles of the ion energy distribution in the range of 600–2200 eV, both parallel and anti-parallel to the plasma current in the ATC tokamak. The measurements were made using a single-energy-channel multi-sight-line neutral-particle detector. The anti-parallel “temperature” profile was found to be parabolic or somewhat broader, in accordance with expectation, while the parallel “temperature” profile was nearly flat from the plasma centre to within a few centimetres of the edge. This difference between the two profiles is tentatively interpreted as being due to neoclassical effects associated with large banana orbits.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Condensed Matter Physics