Author/Authors :
Fernلndez، نويسنده , , A. and de la Fuente، نويسنده , , J.M. and Ganuza، نويسنده , , D. and Kirpitchev، نويسنده , , I. and Alonso، نويسنده , , J. and Garcيa، نويسنده , , F. and Ascasيbar، نويسنده , , E. and del Rيo، نويسنده , , J.M. and Garcيa، نويسنده , , I. and Ros، نويسنده , , A. and ءlvarez، نويسنده , , P. and Tolkachev، نويسنده , , A. and Catalلn، نويسنده , , G.، نويسنده ,
Abstract :
The ECRH system of the TJ-II stellarator consists of two triode – 53.2 GHz – gyrotrons, which can deliver a maximum power of 300 kW each, during 1 s. Both gyrotrons are fed by a common high voltage power supply (HVPS). During the last experimental campaigns the performance of the gyrotrons were limited by the HVPS, whose maximum output current was limited to 30 A and the ripple level of the output voltage was around 7%. In order to guarantee the reliability of the ECRH system and to improve its performance, a new HVPS has been developed and manufactured by the company JEMA and was commissioned at CIEMAT during 2007. The design is based on solid-state technology and high frequency commutation techniques. The new unit reaches −80 kV and 50 A during a maximum pulse length of 1 s. The complete design, testing and commissioning of the HVPS are presented, as well as the routine operation of the ECRH system during the TJ-II experimental campaign.
Keywords :
Plasma heating , Gyrotron , SOLID-STATE , power supplies
