Confinement studies in the TJ-II stellarator

Author	C. Alejaldre J. Alonso L. Almoguera E. Ascasibar A. Baciero R. Balbin M. Blaumoser J. Botija B. Branas E. De La Cal A. Cappa R. Carrasco F. Castejon J. R. Cepero C. Cremy J. M. Delgrado J. Doncel C. Dulya T. Estrada A. Fernandez C. Fuentes A. Garcia I. Garcia-Cortes J. Guasp J. Herranz C. Hidalgo J. A. Jimenez I. Kirpitchev V. Krivenski I. Labrador F. Lapayese K. Likin M. Linier A. Lopez-Fraguas A. Lopez-Sanchez E. de la Luna R. Martin A. Martinez L. Martinez-Laso M. Medrano P. Mendez K. J. McCarthy F. Medina B. van Milligen M. Ochando L. Pacios I. Pastor M. A. Pedrosa A. de la Pena A. Portas J. Qin L. Rodriguez-Rodrigo A. Salas E. Sanchez J. Sanchez F. Tabares D. Tafalla V. Tribaldos J. Vega B. Zurro D. Akulina O. I. Fedyanin S. Grebenshchikov N. Kharchev A. Meshcheryakov K. A. Sarksian R. Barth G. van Dijk H. van der Meiden
Abstract	ECR (electron cyclotron resonance) heated plasmas have been studied in the low magnetic shear TJ-II stellarator (R = 1.5 m, a < 0.22 m, B = 1 T, f = 53.2 GHz, P-ECRH = 300 kW, power density = 1-25 W cm(-3)). Recent experiments have explored the flexibility of the TJ-II across a wide range of plasma volumes with different rotational transforms and rational surface densities. In this paper, the main results of this campaign are presented and, in particular, the influence of iota and rational surfaces on plasma profiles is discussed.
Year of Publication	1999
Journal	Plasma Physics and Controlled Fusion
Volume	41
Number of Pages	B109-B117
Date Published	Dec
ISBN Number	0741-3335
DOI	10.1088/0741-3335/41/12b/307
PId	73e0cb2c2aababbc74592c64d09eb92c
	Journal Article
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