Jie SHANG, Yuan HUANG, Kai YANG, Bao-wei CHEN, Chun-hua LIU, Yi YANG. Progress of Thomson Scattering Diagnostic on HL-2A Tokamak[J]. Spectroscopy and Spectral Analysis, 2021, 41(2): 333
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 2, 333 (2021)
Fig. 1. Layout of the HL-2A Thomson scattering system
Fig. 2. (a) is the pulsed light used for spectral calibration, its width is about 0.8 ms and repetition time is about 4.5 ms; (b) is relative spectral responsibility of a 5-channel polychromator for T e measurement of 50 eV~3 keV
Fig. 3. V1742B digitizers are set to sample at 2.5 GS·s-1, the time window of data acquisition is 410 ns
(a) is shown the raw data of a TS signal, its FWHM is about 25 ns, and Gaussian function is utilized to fit the pulse shape (red line); (b) is displayed the laser monitor
(a) is shown the raw data of a TS signal, its FWHM is about 25 ns, and Gaussian function is utilized to fit the pulse shape (red line); (b) is displayed the laser monitor
Fig. 4. The time interval of TS signals and laser monitor is shown for poly #7
CH# denotes the index of optical channels; the TS data of 5th channel is very weak and not used
CH# denotes the index of optical channels; the TS data of 5th channel is very weak and not used
Fig. 5. When the scattering signal is weak, the “intrinsic” function parameters b and c of this channel can be used to fit the pulse shape of the scattering signal
Fig. 6. Measurement results of electron temperature at core plasma for shot#34269, with NBI during 800~1 300 ms
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