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An alternative concept of the residual ion dump for the ITER NBI system is presented. The incentive is to avoid the inherent risk of the in-line electrostatic ion removal concept, which is presently foreseen in the NBI design; beam-blocking by enhanced reionization losses and potential amplification of electron currents by electrostatic acceleration. It is proposed to use instead a conventional magnetic ion removal system with remote ion dumps. This method of removing the residual ions has been proven in almost all injection systems world-wide over the last two decades. First calculations show that the maximum power load can be kept below 15 MW/m2, sufficiently low to use conventional dump plate designs.

Additional information

Authors: FRANZEN P, Max-Planck-Institut fur Plasmaphysik, Garching (DE);REIDL R, Max-Planck-Institut fur Plasmaphysik, Garching (DE);SPETH E, Max-Planck-Institut fur Plasmaphysik, Garching (DE);SIELANKO J, Uniwersytet Marii-Curie Sklodowskiej, Lublin (PL)
Bibliographic Reference: An article published in: Fusion Engineering and Design, 56-57 (2001) 511-515
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