TY - JOUR
T1 - Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma
AU - Hanada, K.
AU - Tanaka, H.
AU - Iida, M.
AU - Ide, S.
AU - Minami, T.
AU - Nakamura, M.
AU - Maekawa, T.
AU - Terumichi, Y.
AU - Tanaka, S.
AU - Yamada, M.
AU - Manickam, J.
AU - White, R. B.
PY - 1991
Y1 - 1991
N2 - Sawtooth oscillations (STO) in the Ohmically heated WT-3 tokamak are strongly modified or suppressed by localized-electron cyclotron resonance heating (ECH) near the q=1 surface, where q refers to the safety factor. The efect of ECH is much stronger when it is applied on the high-field side as compared to the low-field side. Complete suppression of the STO is achieved for the duration of the ECH, in most cases, when it is applied on the high-field side of a low-density plasma, provided the ECH power exceeds a threshold value. The STO stabilization is attributed to a modification of the current-density profile by hot electrons generated by ECH, which reduces the shear in the q=1 region.
AB - Sawtooth oscillations (STO) in the Ohmically heated WT-3 tokamak are strongly modified or suppressed by localized-electron cyclotron resonance heating (ECH) near the q=1 surface, where q refers to the safety factor. The efect of ECH is much stronger when it is applied on the high-field side as compared to the low-field side. Complete suppression of the STO is achieved for the duration of the ECH, in most cases, when it is applied on the high-field side of a low-density plasma, provided the ECH power exceeds a threshold value. The STO stabilization is attributed to a modification of the current-density profile by hot electrons generated by ECH, which reduces the shear in the q=1 region.
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U2 - 10.1103/PhysRevLett.66.1974
DO - 10.1103/PhysRevLett.66.1974
M3 - Article
AN - SCOPUS:0000256540
VL - 66
SP - 1974
EP - 1977
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
ER -