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Rev Sci Instrum. 2017 Aug;88(8):083505. doi: 10.1063/1.4997074.

Development of beam emission spectroscopy diagnostic on EAST.

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School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.


Beam Emission Spectroscopy (BES) diagnostic based on Neutron Beam Injection (NBI) on the Experimental Advanced Superconducting Tokamak has been developed. This system consists of 16 × 8 channels which can diagnose the density fluctuation in a rectangular area of about 20 × 10 cm2 in the cross section, whose radial position is adjustable from the core to edge just by means of changing the angle of the rotation mirror. The spatial resolution is about 1-3 cm according to the diagnosed radial position. The temporal resolution is 1 μs. Space calibration of the diagnostic system is done based on the reversibility of the optical path. The NBI modulation experiment shows the success of BES development.


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