Development of beam emission spectroscopy diagnostic on EAST.

H J WangY YuR ChenY F WuB D YuanS B GongQ J YuB LyuY J ShiM Y YeBaonian Wan

Published in: The Review of scientific instruments (2018)

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.

Keyphrases

high resolution
single molecule
solid state
ultrasound guided
electron microscopy
monte carlo
mass spectrometry
low cost