High spatial and temporal resolution charge exchange recombination spectroscopy on the HL-2A tokamak

Journal Article · Wed Oct 01 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4897186· OSTI ID:22305887

Wei, Y. L.; Liu, L.; Cao, J. Y.; Sun, A. P.; Ma, Q.; Chen, W. J.; Liu, Yi; Yan, L. W.; Yang, Q. W.; Duan, X. R.; Liu, Yong ^[1]; Ida, K. ^[2]; Hellermann, M. von ^[3]

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1. Southwestern Institute of Physics, Chengdu 610041 (China)
2. National Institute for Fusion Science, Toki 509-5292 (Japan)
3. ITER Diagnostic Team, IO, Route de Vinon sur Verdon, 13115 St Paul lez Durance (France)

A 32/64-channel charge exchange recombination spectroscopy (CXRS) diagnostic system is developed on the HL-2A tokamak (R = 1.65 m, a = 0.4 m), monitoring plasma ion temperature and toroidal rotation velocity simultaneously. A high throughput spectrometer (F/2.8) and a pitch-controlled fiber bundle enable the temporal resolution of the system up to 400 Hz. The observation geometry and an optimized optic system enable the highest radial resolution up to ~1 cm at the plasma edge. The CXRS system monitors the carbon line emission (C VI, n = 8–7, 529.06 nm) whose Doppler broadening and Doppler shift provide ion temperature and plasma rotation velocity during the neutral beam injection. The composite CX spectral data are analyzed by the atomic data and analysis structure charge exchange spectroscopy fitting (ADAS CXSFIT) code. First experimental results are shown for the case of HL-2A plasmas with sawtooth oscillations, electron cyclotron resonance heating, and edge transport barrier during the high-confinement mode (H-mode)

• OSTI ID: 22305887
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Publisher: Optical Society of America
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHARGE EXCHANGE
DOPPLER EFFECT
ECR HEATING
HL-2A TOKAMAK
H-MODE PLASMA CONFINEMENT
ION TEMPERATURE
PLASMA
PLASMA DIAGNOSTICS
RECOMBINATION
SAWTOOTH OSCILLATIONS
SPATIAL RESOLUTION
SPECTROMETERS
SPECTROSCOPY
TIME RESOLUTION