Speaker
Mr
Weiming Li
(University of Science and Technology of China)
Description
Interferometer for plasma density measurement is sensitive to path length change and mechanical vibration introduced by optics, temperature, airflow and even sound waves. It is a particular problem for a short wavelength interferometer which will be used for burning plasmas like ITER since the phase change due to vibrations is inversely proportional to wave length. To minimize these effects on interferometer, traditionally two-color interferometer is utilized to compensate path length change and mechanical vibration. The alignment between two-color interferometer has to be carefully done to eliminate vibration effects. Dispersion interferometer is a another good choice to solve this problem since it provides auto-compensation for path length change and mechanical vibration
This paper describes a conceptual design of a CO2 dispersion interferometer based on a modulation amplitude technique for Experimental Advanced Superconducting Tokamak (EAST). This dispersive CO2 interferometer will enhance the reliability of the electron density measurement and reduces maintenance of interferometer for routine operation. The optical design, nonlinear crystal properties and harmonics laser profile as well as bench test of interferometer will be presented.
Primary author
Mr
Weiming Li
(University of Science and Technology of China)
Co-authors
Dr
Haiqing Liu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Long Zeng
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Xuechao Wei
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yao Yang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yinxian Jie
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yuan Yao
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Zhiyong zou
(University of Science and Technology of China)
