Speaker
Vincenzo Variale
(INFN-BA)
Description
High current large negative (H-, D-) ion sources will produce the neutral beams needed for fusion plasma heating in ITER. To reach very high negative ion beams a cesium coated surface of the plasma grid is usually used. The cesium coating however, poses some problem in the maintenance and operation of the ion source and for that alternative ways to enhance the ion current extraction should be investigated. An alternative way to enhance the beam current could be the use of a Planar Funnel Extraction (PFE) grid recently proposed for applications where a very high extraction efficiency are required [1]. In this contribution the idea of applying the PFE to a negative ion source instead of the cesium coating will be discussed.
[1] A. Chaudhary et al., Review of Scientific Instruments 85, 105101 (2014); doi: 10.1063/1.4897480
| If a proceedings is prepared,<br></br> will you submit a contribution? | yes |
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Primary author
Vincenzo Variale
(INFN-BA)
