TJ-II Project: A Flexible Heliac Stellarator

Carlos Alejaldre; Jose Javier Alonso Gozalo; Jose Botija Perez; Francisco Castej&oacute;n Maga&ntilde;a; Jose Ramon Cepero Diaz; Jose Guasp Perez; A. Lopez-Fraguas; Luis Garc&iacute;a; Vladimir I. Krivenski; R. Mart&iacute;n; A. P. Navarro; Angel Perea; Antonio Rodriguez-Yunta; Mario Sorolla Ayza; Antonio Varias

doi:dx.doi.org/10.13182/FST17-131-139

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TJ-II Project: A Flexible Heliac Stellarator

Carlos Alejaldre, Jose Javier Alonso Gozalo, Jose Botija Perez, Francisco Castejón Magaña, Jose Ramon Cepero Diaz, Jose Guasp Perez, A. Lopez-Fraguas, Luis García, Vladimir I. Krivenski, R. Martín, A. P. Navarro, Angel Perea, Antonio Rodriguez-Yunta, Mario Sorolla Ayza, Antonio Varias

Fusion Science and Technology / Volume 17 / Number 1 / January 1990 / Pages 131-139

Technical Paper / Stellarator System / dx.doi.org/10.13182/FST17-131-139

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The TJ-II device is a medium-size (R₀ = 1.5 m, ⟨a_p⟩ = 0.2 to 0.25 m, B₀ = 1 T) helical-axis stellarator to be built at the CIEMAT site in Madrid. Its main characteristics are (a) potential for high-beta operation; (b) flexibility, i.e., its rotational transform can be varied over a wide range and its shear to some extent; and (c) bean-shaped plasma cross section. The latest understanding of TJ-II physics in the fields of electron cyclotron resonance heating, transport, and magnetohydrodynamics, and the engineering solutions introduced in its final design are discussed.