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 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Fingerprint Dive into the research topics of 'Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma'. Together they form a unique fingerprint.
Cite this
Hanada, K., Tanaka, H., Iida, M., Ide, S., Minami, T., Nakamura, M., Maekawa, T., Terumichi, Y., Tanaka, S., Yamada, M., Manickam, J., & White, R. B. (1991). Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma. Physical Review Letters, 66(15), 1974-1977. https://doi.org/10.1103/PhysRevLett.66.1974