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Chin. Opt. Lett.
 Home  List of Issues    Issue 12 , Vol. 16 , 2018    10.3788/COL201816.121201


System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak
Yi Yu1, Shaobo Gong1;2, Min Xu2, Boda Yuan1;2, Yifan Wu1;2, Lin Nie2, Rui Ke2, Minyou Ye1, and Xuru Duan2
1 School of Physics, [University of Science and Technology of China], Hefei 230026, China
2 [Southwestern Institute of Physics], Chengdu 610041, China

Chin. Opt. Lett., 2018, 16(12): pp.121201

DOI:10.3788/COL201816.121201
Topic:Instrumentation, measurement and metrology
Keywords(OCIS Code): 120.5050  150.1488  350.5400  120.5060  120.1880  

Abstract
System validation and density fluctuation calibration of phase contrast imaging (PCI) on an HL-2A tokamak are presented. Signals from different channels show not only a pronounced modulation of an incident laser beam induced by a sound wave, but also an excellent magnification and low image distortion of optics. The frequency-wavenumber spectrum is achieved by using two-dimensional Fourier transform of time series signals. The conversion coefficient between detected signal amplitude and chord integral plasma density fluctuation is 2.35?×?1013?m?2/mV, which promises a suitable signal level at the order of volts of the PCI in typical HL-2A discharges.

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Received:2018/6/20
Accepted:2018/11/1
Posted online:2018/11/29

Get Citation: Yi Yu, Shaobo Gong, Min Xu, Boda Yuan, Yifan Wu, Lin Nie, Rui Ke, Minyou Ye, and Xuru Duan, "System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak," Chin. Opt. Lett. 16(12), 121201(2018)

Note: This work was supported by the National Magnetic Confinement Fusion Energy Research Project (No. 2015GB120002), the National Key Research and Development Program of China (No. 2017YFE0300405), and the National Natural Science Foundation of China (Nos. 11705052, 11575055, and 11611130164).



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