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(OV4/4) Review of Confinement and Transport Studies in the TJ-II Flexible Heliac

C. Alejaldre, J. Alonso, L. Almoguera, E. Ascasíbar, A. Baciero, R. Balbín, M. Blaumoser, J. Botija, B. Brañas, E. de la Cal, A. Cappa, R. Carrasco, F. Castejón, J. R. Cepero, C. Cremy, J. Doncel, S. Eguilior, T. Estrada, A. Fernández, C. Fuentes, A. García, I. García-Cortés, J. Guasp, J. Herranz, C. Hidalgo, J. A. Jiménez, I. Kirpitchev, V. Krivenski, I. Labrador, F. Lapayese, K. Likin, M. Liniers, A. López-Fraguas, A. López-Sánchez, E. de la Luna, R. Martín, L. Martínez-Laso, M. Medrano, P. Méndez, K. J. McCarthy, F. Medina, B. van Milligen, M. Ochando, L. Pacios, I. Pastor, M. A. Pedrosa, A. de la Peña, A. Portas, J. Qin, L. Rodríguez-Rodrigo, A. Salas, E. Sánchez, J. Sánchez, F. Tabarés, D. Tafalla, V. Tribaldos, J. Vega, B. Zurro
 
¹⁾ Laboratorio Nacional de Fusión, Asociación EURATOM-CIEMAT, Madrid, Spain

Abstract.  TJ-II is a four period, low magnetic shear stellarator ( R = 1.5m, a < 0.22m, B₀ $\leq$ 1.2T) which was designed to have a high degree of magnetic configuration flexibility. In the last experimental campaign, coupling of the full ECH power ( P_ECRH $\leq$ 600kW) to the plasma has been possible using two ECRH transmission lines which have different power densities. Both helium and hydrogen fuelled plasmas have been investigated. This paper reviews the latest physics results in particle control, configuration effects, and transport and fluctuation studies.

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