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de Vries, P. C.*; Salmi, A.*; Parail, V.*; Giroud, C.*; Andrew, Y.*; Biewer, T. M.*; Cromb, K.*; Jenkins, I.*; Johnson, T.*; Kiptily, V.*; et al.
Nuclear Fusion, 48(3), p.035007_1 - 035007_6, 2008/03
Times Cited Count:48 Percentile:85.94(Physics, Fluids & Plasmas)Dedicated experiments on TF ripple effects on the performance of tokamak plasmas have been carried out at JET. The TF ripple was found to have a profound effect on the plasma rotation. The central Mach number, M, defined as the ratio of the rotation velocity and the thermal velocity, was found to drop as a function of TF ripple amplitude from an average value of M = 0.40-0.55 for operations at the standard JET ripple of 0.08% to M = 0.25-0.40 for 0.5% ripple and M = 0.1-0.3 for 1% ripple. With standard co-current injection of neutral beam injection (NBI), plasmas were found to rotate in the co-current direction. However, for higher TF ripple amplitudes () an area of counter rotation developed at the edge of the plasma, while the core kept its co-rotation.
Sasao, Mamiko*; Nishitani, Takeo; Krasilnikov, A.*; Popovichev, S.*; Kiptily, V.*; Kallne, J.*
Fusion Science and Technology, 53(2), p.604 - 639, 2008/02
Times Cited Count:31 Percentile:61.43(Nuclear Science & Technology)no abstracts in English