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In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence
Published on: June 13, 2020
High speed vacuum ultraviolet telescope system for edge fluctuation measurement in the large helical device
T F Ming1, S Ohdachi, S Sakakibara
1Department of Physical Sciences, The Graduate University for Advanced Studies, 322-6 Oroshi-cho, Toki, Japan. ming_tingfeng@lhd.nifs.ac.jp
The Review of Scientific Instruments
|November 7, 2012
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.

