DOI: 10.1063/5.0315404 ISSN: 0034-6748
Development of a prototype multi-scale turbulence coherent scattering diagnostic system based on far-infrared lasers on the HL-3 tokamak
Z. P. Hou, B. H. Deng, C. Y. Chen, Q. L. Zhang, L. Nie, S. B. Gong, H. T. Chen, C. H. Liu, D. L. Zheng, Z. C. He, W. P. Guo, Z. B. Shi, W. Chen, W. L. Zhong, Z. J. Sun, H. Y. LiA multi-scale turbulence coherent scattering diagnostic system development on the HL-3 tokamak is described with technical details, including custom laser development, light pipe design for laser beam propagation in free space, window designs, scattering light detection optical design and alignment, and a mixer bias circuit design with soft turn on and off function for the mixer protection. Preliminary turbulence measurement data with a wavenumber range from 0 to 11 cm−1 have been obtained, and correlation between turbulence activity and plasma confinement property variation is observed.