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Beam Species Evolution Under Long Pulse Operation for EAST-NBI by Doppler Shift Spectroscopy Diagnostic System

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Abstract

A Doppler shift spectroscopy (DSS) system has been applied to the neutral beam injection system on the Experimental Advanced Superconducting Tokamak. The DSS optical diagnostic system has significant advantages for diagnosing the high power neutral beam, such as real-time, no contact. The major components of the system are lens, optical fiber, grating spectrometer, CCD, software and computer. With a spectrum of the Hα lines, the DSS system gives the beam energy, the beam divergence, and the beam species fractions. The beam species evolution is measured by DSS. The result indicates that there is no significant different for beam species under the long pulse operation and fully illustrate the good performance of the DSS.

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Acknowledgments

The authors would like to thank the other members of the EAST-NBI Group in Institute of Plasma Physics, Chinese Academy of Science. This work was supported by the National Magnetic Confinement Fusion Science Program of China (Contract No. 2013GB101000) and the National Natural Science Foundation of China (No. 11175211).

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Authors and Affiliations

  1. Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), Hefei, 230031, China

    Yan Wang, Bin Wu, Li-Zhen Liang, Chun-Dong Hu, Jiang-Long Wei & Xiang-Xue Zhao

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  1. Yan Wang
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  2. Bin Wu
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  3. Li-Zhen Liang
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  4. Chun-Dong Hu
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Correspondence to Yan Wang.

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Wang, Y., Wu, B., Liang, LZ. et al. Beam Species Evolution Under Long Pulse Operation for EAST-NBI by Doppler Shift Spectroscopy Diagnostic System. J Fusion Energ 34, 615–619 (2015). https://doi.org/10.1007/s10894-015-9852-4

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  • DOI: https://doi.org/10.1007/s10894-015-9852-4

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