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Applicability of Heavy Ion Beam Probing for Stellarator W7-X

S. Perfilov, A. Melnikov, L. Krupnik, H. J. Hartfuss

Fusion Science and Technology / Volume 51 / Number 1 / January 2007 / Pages 38-45

Technical Paper / Stellarators /

A feasibility study for the heavy ion beam probe on the Wendelstein 7-X (W7-X) stellarator was done to provide measurements of the radial profiles of plasma potential, density, and their fluctuations. Calculations of probing Tl+ beam trajectories were done for the various W7-X magnetic configurations with Btor = 2.5 T. They show that satisfactory access is possible for K11-N11 port combination. The trajectory optimization aiming for the maximal plasma observation was done for the chosen port combination.

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