Author/Authors :
Dammertz، نويسنده , , G. and Alberti، نويسنده , , S. and Bariou، نويسنده , , D. Jacobus Brand، نويسنده , , P. and Braune، نويسنده , , H. and Erckmann، نويسنده , , V. and Gantenbein، نويسنده , , G. and Giguet، نويسنده , , E. and Heidinger، نويسنده , , R. and Hogge، نويسنده , , J.P. and Kasparek، نويسنده , , W. and Laqua، نويسنده , , H.P. and Liévin، نويسنده , , C. and Leonhardt، نويسنده , , W. and Michel، نويسنده , , G. and Müller، نويسنده , , G. and Neffe، نويسنده , , G. and Piosczyk، نويسنده , , B. and Schmid، نويسنده , , M. and Thumm، نويسنده , , M.، نويسنده ,
Abstract :
Electron cyclotron resonance heating (ECRH) has proven to be one of the most attractive heating schemes for stellarators. Therefore, ECRH was chosen to be the main heating method for the Wendelstein 7-X stellarator (W7-X) now under construction at IPP Greifswald, Germany. A 10 MW ECRH system with continuous wave (CW) possibilities, operating at 140 GHz will be built up to meet the scientific goals of the stellarator. Two prototype gyrotrons with an output power of 1 MW were developed in collaboration between European research laboratories and European industry (Thales Electron Devices, France). The gyrotrons are equipped with a single-stage depressed collector, an optimised quasi-optical mode converter and a CVD-diamond window. The prototypes have been successfully tested at FZK. With the second one, an output power of 0.89 MW at a pulse duration of 3 min and an output power of 0.54 MW for about 15 min have been obtained.
Keywords :
plasmas , Gyrotrons , Fusion , Electron emission , Mode converter , Stellarator
