Fast charge exchange recombination spectroscopy on HuanLiu-2A tokamak
| Autor: | M. Xu, Q. W. Yang, D. L. Yu, X. F. He, L. W. Yan, X. X. He, W. J. Chen, Yi Liu, L. Liu, Y. L. Wei, X. R. Duan, Zhongbing Shi, Q. Ma |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Tokamak Materials science Pixel business.industry chemistry.chemical_element Sawtooth wave 01 natural sciences Spectral line 010305 fluids & plasmas law.invention Optics chemistry law 0103 physical sciences Charge-coupled device business Spectroscopy Instrumentation Radiant intensity Helium |
| Zdroj: | The Review of scientific instruments. 91(5) |
| ISSN: | 1089-7623 |
| Popis: | A Fast Charge eXchange Recombination Spectroscopy (CXRS) diagnostic with eight radial channels has been implemented on a HuanLiu-2A (HL-2A) tokamak with a time resolution of up to 10 kHz monitoring helium II spectra or 1 kHz monitoring carbon VI spectra. The crucial aspects of the fast CXRS are to improve the spectral intensity and the acquisition frequency. The spectral intensity has been greatly enhanced by customized fiber bundles. The main boost in optimizing the acquisition frequency is achieved by binning more pixel rows of the charge coupled device (CCD) representing one radial channel and by reducing the effective image area of the CCD. Consequently, the sawtooth oscillations of ion temperature and rotation velocity are continuously observed for the first time in the HL-2A tokamak. |
| Databáze: | OpenAIRE |
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