Non-resonant magnetic braking on JET and TEXTOR

Y. Sun, Y. Liang, H.R. Koslowski, S. Jachmich, A. Alfier, O. Asunta, G. Corrigan, E. Delabie, C. Giroud, M.P. Gryaznevich, D. Harting, T. Hender, E. Nardon, V. Naulin, V. Parail, Tuomas Tala, C. Wiegman, S. Wiesen, T. Zhang, K.C. ShaingJET-EFDA contributors

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


The non-resonant magnetic braking effect induced by an NonAxisymmetric Magnetic Perturbation (NAMP) is investigated on JET and TEXTOR. The collionality dependence of the torque induced by the n = 1 NAMP field is obtained on JET. The observed torque is located mainly in the plasma core (normalized ρ < 0.4). It increases with decreasing collisionality. The calculation shows that it is close to the transition between the ν − √ν and the superbanana plateau regimes in the plasma core. The NTV torque is modeled by using the smoothly connnected formula in the collisionless regimes. The calculated collisionality dependence shows the same tendency as the experimental observation due to the resonant particle effect. The strongest NTV torque is also located in the plasma core because of the resonant particle effect. However, the magnitudes of the NTV torque is still about 1-2 orders smaller than the observed ones on JET. There is no obvious braking effect with m/n = 6/2 NAMP generated by the Dynamic Ergodic Divertor (DED) on TEXTOR. The calculated NTV torque on TEXTOR is also very small.
Original languageEnglish
Title of host publicationProceedings of the 23rd IAEA Fusion Energy Conference
PublisherInternational Atomic Energy Agency IAEA
Publication statusPublished - 2010
MoE publication typeNot Eligible
Event23rd IAEA Fusion Energy Conference, FEC 2010 - Daejon, Korea, Republic of
Duration: 10 Oct 201016 Oct 2010


Conference23rd IAEA Fusion Energy Conference, FEC 2010
Country/TerritoryKorea, Republic of


  • plasma physics
  • fusion energy


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