Author/Authors :
Fuentes، نويسنده , , C. and Liniers، نويسنده , , M. and Wolfers، نويسنده , , G. and Alonso، نويسنده , , J. and Marcon، نويسنده , , G. and Carrasco، نويسنده , , R. and Guasp، نويسنده , , J. and Acedo، نويسنده , , M. and Sلnchez، نويسنده , , E. and Medrano، نويسنده , , M. and Garcيa، نويسنده , , A. and Doncel، نويسنده , , J. and Alejaldre، نويسنده , , C. and Tsai، نويسنده , , C.C. and Barber، نويسنده , , G. and Sparks، نويسنده , , D.، نويسنده ,
Abstract :
Neutral beam injection (NBI) heating has been used on the TJ-II stellarator for the first time. The beam has a port-through power between 200 and 400 kW and injection energy 28 kV. Beam transmission is limited by beam interception at the injection port and the first toroidal field coil, therefore, beam steering optimization is of critical importance. The beam interaction areas inside TJ-II vacuum chamber are surveyed by infrared thermography. Beam reionization can be a problem due to the presence of residual gas in the duct region. Halpha emission is used to monitor the reionization at the duct. A careful optimization of the injected gas has been carried out.
