Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1974-1977 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 66 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - Jan 1 1991 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma. / Hanada, Kazuaki; Tanaka, H.; Iida, M.; Ide, S.; Minami, T.; Nakamura, M.; Maekawa, T.; Terumichi, Y.; Tanaka, S.; Yamada, M.; Manickam, J.; White, R. B.
In: Physical Review Letters, Vol. 66, No. 15, 01.01.1991, p. 1974-1977.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma
AU - Hanada, Kazuaki
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 - 1991/1/1
Y1 - 1991/1/1
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
VL - 66
SP - 1974
EP - 1977
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
ER -