Development of the charge exchange recombination spectroscopy and the beam emission spectroscopy on the EAST tokamak

Charge eXchange Recombination Spectroscopy (CXRS) and Beam Emission Spectroscopy (BES) diagnostics based on a heating neutral beam have recently been installed on EAST to provide local measurements of ion temperature, velocity, and density. The system design features common light collection optics f...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11), p.11E428-11E428
Main Authors: Li, Y Y, Fu, J, Lyu, B, Du, X W, Li, C Y, Zhang, Y, Yin, X H, Yu, Y, Wang, Q P, von Hellermann, M, Shi, Y J, Ye, M Y, Wan, B N
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALIGNMENT
BEAMS
CALIBRATION
CHARGE EXCHANGE
DIFFRACTION
EMISSION SPECTROSCOPY
GRATINGS
HT-7U TOKAMAK
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OPTICS
PERFORMANCE TESTING
RECOMBINATION
SIGNAL-TO-NOISE RATIO
SPECTROMETERS
TIME RESOLUTION
WAVELENGTHS
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Summary:Charge eXchange Recombination Spectroscopy (CXRS) and Beam Emission Spectroscopy (BES) diagnostics based on a heating neutral beam have recently been installed on EAST to provide local measurements of ion temperature, velocity, and density. The system design features common light collection optics for CXRS and BES, background channels for the toroidal views, multi-chord viewing sightlines, and high throughput lens-based spectrometers with good signal to noise ratio for high time resolution measurements. Additionally, two spectrometers each has a tunable grating to observe any wavelength of interest are used for the CXRS and one utilizes a fixed-wavelength grating to achieve higher diffraction efficiency for the BES system. A real-time wavelength correction is implemented to achieve a high-accuracy wavelength calibration. Alignment and calibration are performed. Initial performance test results are presented.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4890408