| Paper |
Title |
Page |
| TUPP148 |
Multigrid Negative Ion Source Test and Modeling
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1857 |
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- M. Cavenago
INFN/LNL, Legnaro, Padova
- V. Antoni, G. Serianni, P. Veltri
Consorzio RFX, Euratom ENEA Association, Padova
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Negative ion sources are a fundamental ingredient of neutral ion beam injectors for tokamak, like the ITER project and beyond. While detail of formation of negative ions and meniscus of the plasma beam interface at source extraction at source extraction is still debated, reasonable modelling of the beam extraction is well possible. A project of a small source (up to 9 beamlet of 15 mA each of H-, 60 kV acceleration voltage) is here described, and relevant modeling tools are reviewed. Power load deposition on the extraction grid (about 1.5 kW total) and on the source walls (comparable) need accurate cooling design. The extracted beam is direclty useful for wall damage studies.
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