Author/Authors :
Speth، نويسنده , , E and Ciric، نويسنده , , M and Feist، نويسنده , , J.H and Frank، نويسنده , , P and Heinemann، نويسنده , , B and Kraus، نويسنده , , W and Probst، نويسنده , , F and Riedl، نويسنده , , R and Trainham، نويسنده , , R and Vollmer، نويسنده , , O and Wilhelm، نويسنده , , R، نويسنده ,
Abstract :
The use of rf ion sources in neutral beam injection (NBI) systems offers reduced maintenance and cost due to the absence of filaments. For the first time high-power rf positive ion sources have been put in operation recently in a real NBI system on a tokamak. The performance of the new system is equivalent to that of a conventional one with arc discharge sources. Due to the relevance for ITER, rf sources are also being investigated in context with negative ions: 8.5 mA/cm2 H− have been achieved so far in a non-optimised version.
