Author/Authors :
?iri?، نويسنده , , D. and Ash، نويسنده , , A.D. and Crowley، نويسنده , , B. and Day، نويسنده , , I.E. and Gee، نويسنده , , S.J. and Hackett، نويسنده , , L.J. and Homfray، نويسنده , , D.A. and Jenkins، نويسنده , , I. and Jones، نويسنده , , T.T.C. and Keeling، نويسنده , , D. and King، نويسنده , , D.B. and King، نويسنده , , R.F. and Kovari، نويسنده , , Joshua M. and McAdams، نويسنده , , R. and Surrey، نويسنده , , E. and Young، نويسنده , , D. and Zacks، نويسنده ,
Abstract :
The JET neutral beam injection (NBI) system is undergoing an upgrade of both beam power and pulse duration, which will be completed in 2011. In order to obtain an early assessment of the performance of the upgraded injectors, two positive ion neutral injectors (PINIs) with modified ion source and accelerator configuration were installed on Octant 8 Neutral Injector Box and successfully commissioned in summer 2009. Both PINIs were routinely delivering ∼2 MW of deuterium neutral beam power during the JET experimental campaign in autumn 2009. These early tests allowed us to predict with confidence that the JET NBI upgrade objective of injecting 34 MW of total deuterium neutral beam power into the JET plasma will be achieved.
Keywords :
Particle Beams , Neutral beam injection , tokamak , JET , Plasma heating
