title: High speed vacuum ultraviolet telescope system for edge fluctuation measurement in the large helical device.
abstract: A high speed tangentially viewing vacuum ultraviolet telescope system has been developed in the Large Helical Device (LHD), with the aim of investigating edge MHD activities. The spatial structure of low frequency (~0.75 kHz) MHD activity with poloidal∕toroidal mode numbers of m∕n = 1∕1 has been measured with this diagnostic.
authors.affiliation: Department of Physical Sciences, The Graduate University for Advanced Studies, 322-6 Oroshi-cho, Toki, Japan. ming_tingfeng@lhd.nifs.ac.jp
authors.forename: T F
authors.initials: TF
authors.lastname: Ming
authors.forename: S
authors.initials: S
authors.lastname: Ohdachi
authors.forename: S
authors.initials: S
authors.lastname: Sakakibara
authors.forename: Y
authors.initials: Y
authors.lastname: Suzuki