UKAEA Journals

Showing 1 - 2 of 2 Journals Results
2014
"Fast-ion Deuterium Alpha Spectroscopic Observations of the Effects of Fishbones in the Mega-Ampere Spherical Tokamak"

O.M. Jones C.A. Michael K.G. McClements N.J. Conway B. Crowley R.J. Akers R.J. Lake S.D. Pinches The Mast Team

Using the recently-installed Fast-Ion Deuterium Alpha (FIDA) spectrometer, the effects of low-frequency (20 - 50 kHz) chirping energetic particle modes with toroidal mode number n = 1 on the NBI-driven fast-ion population in MAST plasmas are considered. Results from the FIDA diagnostic are presented and discussed in the light of the present theoret…

Published
2013
"Measurement and control of the fast ion redistribution on MAST"

M. Turnyanskiy C. D. Challis R. J. Akers M. Cecconello D. L. Keeling A. Kirk R. Lake S. D. Pinches S. Sangaroon I. Wodniak

Previous experiments on MAST and other tokamaks have indicated that the level of fast ion redistribution can exceed that expected from classical diffusion and that this level increases with beam power. In this paper we present a quantification of this effect in MAST plasmas using a recently commissioned scanning neutron camera. The observed fast io…

Published