Generation of
E
×
B
flow shear by finite orbit width effects from heat sources in tokamaks
Keyword(s):
Abstract We present a possible mechanism for the generation of strong E × B flow shear relevant to internal transport barrier formation in tokamak plasmas. From gyrokinetic calculations, we show that strong E × B flow shear can be generated by finite orbit width (FOW) effects associated with a non-uniform heat source and is sufficient to lead to transport barrier formation in the core region with a moderate power level. Two FOW effects inducing neoclassical polarization are shown to be responsible for this: 1) the radial drift of particle orbit center due to the variation of the heat source within orbit width and 2) the non-uniformly evolved orbit width by the non-uniform heating.
2001 ◽
Vol 86
(5)
◽
pp. 814-817
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Keyword(s):
2013 ◽
Vol 8
(0)
◽
pp. 2403079-2403079
◽
Keyword(s):
2005 ◽
Vol 47
(10)
◽
pp. 1787-1803
◽
Keyword(s):
2002 ◽
Vol 44
(5A)
◽
pp. A307-A312
◽