title: Development of 2D soft X-ray measurement system in the large helical device.
abstract: A fast two-dimensional soft X-ray camera using silicon photo diode array is being developed in order to investigate high frequency MHD instability with high mode number. The advantage of the adopted diode is a large sensor area of 10 mm × 10 mm and small diode capacitance which enable us to measure signals with the short response time. The characteristic of the prototype is summarized as follows: Channel number is 6 × 8 = 48, detection range 1∼10 keV, the spatial resolution 128 mm at the plasma location, and frequency range DC∼100 kHz. Synthetic image of the prototype in the Large Helical Device is estimated by using perturbation model of MHD mode.
authors.affiliation: National Institute for Fusion Science, Gifu, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Takemura
authors.affiliation: National Institute for Fusion Science, Gifu, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ohdachi
authors.affiliation: National Institute for Fusion Science, Gifu, Japan.
authors.forename: K Y
authors.initials: KY
authors.lastname: Watanabe
authors.affiliation: Department of Fusion Science, The Graduate University for Advanced Studies, Gifu, Japan.
authors.forename: X D
authors.initials: XD
authors.lastname: Du