Development of 6 MeV heavy ion beam probe for large helical device

摘要

6MeV heavy ion beam probe (HIBP) has been developed for the measurements of electrostatic potential and density and potential fluctuations in the Large Helical Device (LHD) plasma. The whole system has been constructed in the last campaign and some improvements of the system are achieved for high voltage operation in leak magnetic field of LHD. The primary beams can be observed by detectors mounted on the inner vacuum vessel for the purpose of confirmation of beam trajectories in the magnetic field of LHD.