TY - JOUR
T1 - Destabilization of TAE modes using ICRH in ASDEX upgrade
AU - ASDEX-Upgrade team
AU - Borba, D.
AU - Conway, G.D.
AU - Günter, S.
AU - Huysmans, G.T.A.
AU - Klose, S.
AU - Maraschek, M.
AU - Mück, A.
AU - Nunes, I.
AU - Pinches, S. D.
AU - Serra, F.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - Toroidicity-induced Alfvén eigenmodes (TAEs) are destabilized in
ASDEX Upgrade using ion cyclotron resonant heating (ICRH). Unstable TAEs
are observed in the magnetic probes, reflectometer and soft x-ray
cameras when the ICRH power exceeds PICRH > 2.5 MW in both
conventional and advanced scenarios. The most unstable TAEs have
toroidal mode numbers n = 3, 4, 5, 6, and experiments with reversed
currents and magnetic fields have shown that the TAEs propagate in the
co-current direction, i.e. in the ion diamagnetic drift direction,
confirming that these modes are destabilized by the ICRH-produced
energetic ions. The characterization of the TAE instability in ASDEX
Upgrade is reported, focusing on the identification of the toroidal,
poloidal and radial mode structures. The data are compared with the
ideal magnetohydrodynamic model.
AB - Toroidicity-induced Alfvén eigenmodes (TAEs) are destabilized in
ASDEX Upgrade using ion cyclotron resonant heating (ICRH). Unstable TAEs
are observed in the magnetic probes, reflectometer and soft x-ray
cameras when the ICRH power exceeds PICRH > 2.5 MW in both
conventional and advanced scenarios. The most unstable TAEs have
toroidal mode numbers n = 3, 4, 5, 6, and experiments with reversed
currents and magnetic fields have shown that the TAEs propagate in the
co-current direction, i.e. in the ion diamagnetic drift direction,
confirming that these modes are destabilized by the ICRH-produced
energetic ions. The characterization of the TAE instability in ASDEX
Upgrade is reported, focusing on the identification of the toroidal,
poloidal and radial mode structures. The data are compared with the
ideal magnetohydrodynamic model.
U2 - 10.1088/0741-3335/46/5/006
DO - 10.1088/0741-3335/46/5/006
M3 - Article
SN - 0741-3335
VL - 46
SP - 809
EP - 833
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 5
ER -