| Autor: |
Rice JE; Plasma Science & Fusion Center (PSFC), Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., Cziegler I, Diamond PH, Duval BP, Podpaly YA, Reinke ML, Ennever PC, Greenwald MJ, Hughes JW, Ma Y, Marmar ES, Porkolab M, Tsujii N, Wolfe SM |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2011 Dec 23; Vol. 107 (26), pp. 265001. Date of Electronic Publication: 2011 Dec 20. |
| DOI: |
10.1103/PhysRevLett.107.265001 |
| Abstrakt: |
Direction reversals of intrinsic toroidal rotation have been observed in diverted Alcator C-Mod Ohmic L-mode plasmas following electron density ramps. For low density discharges, the core rotation is directed cocurrent, and reverses to countercurrent following an increase in the density above a certain threshold. Such reversals occur together with a decrease in density fluctuations with 2 cm(-1)≤k(θ)≤11 cm(-1) and frequencies above 70 kHz. There is a strong correlation between the reversal density and the density at which the Ohmic L-mode energy confinement changes from the linear to the saturated regime. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
