Developments of scintillator-based soft x-ray diagnostic in LHD with CsI:Tl and P47 scintillators

Journal Article · Tue Nov 15 00:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960418· OSTI ID:22596549

Ohdachi, S.; Suzuki, Y. ^[1]

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1. SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki 509-5292 (Japan)

Multi-channel soft x-ray (SX) diagnostic has been used in the large helical device (LHD) to research magnetohydrodynamic equilibria and activities. However, in the coming deuterium plasma experiments of LHD, it will be difficult to use semiconductor systems near LHD. Therefore, a new type of SX diagnostic, a scintillator-based type diagnostic, has been investigated in order to avoid damage from the radiation. A fiber optic plate coated by P47 scintillator will be used to detect SX emission. Scintillation light will be transferred by pure silica core optical fibers and detected by photomultiplier tubes. A vertically elongated section of LHD will be covered by a 13 ch. array. Effects from the Deuterium Deuterium neutrons can be negligible when the scintillator is covered by a Pb plate 4 cm in thickness to avoid gamma-rays.

• OSTI ID: 22596549
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DAMAGE
DEUTERIUM
DIAGNOSTIC TECHNIQUES
EMISSION
EQUILIBRIUM
GAMMA RADIATION
LHD DEVICE
NEUTRONS
OPTICAL FIBERS
PHOSPHORS
PHOTOMULTIPLIERS
PLASMA
PLATES
SCINTILLATIONS
SEMICONDUCTOR MATERIALS
SILICA
SOFT X RADIATION
THICKNESS
TUBES