15-19 April 2018
Paradise Point Resort & Spa
America/Los_Angeles timezone

12.20 A 4k Hz high temporal resolution Thomson scattering diagnostic developed on EAST

18 Apr 2018, 20:30
2h 1m
Paradise Point Resort & Spa

Paradise Point Resort & Spa

1404 Vacation Rd, San Diego, CA 92109

Speakers

Qing ZANG (Institute of Plasma Physics, Chinese Academy of Sciences) Ailan Hu (Institute of Plasma Physics, Chinese Academy of Sciences) Xiaofeng Han (Institute of Plasma Physics, Chinese Academy of Sciences) Shumei Xiao (Institute of Plasma Physics, Chinese Academy of Sciences) Yong Che (Institute of Plasma Physics, Chinese Academy of Sciences) MengFang Ren (Institute of Plasma Physics, Chinese Academy of Sciences) Da Li (Institute of Plasma Physics, Chinese Academy of Sciences) C.L. Hsieh (General Atomics) Junyu Zhao

Description

Recently, the high frequency Thomson scattering diagnostic system has been upgraded on EAST tokamak, with a temporal resolution up to 4kHz by using a newly designed 1064nm Nd:YAG (neodymium - yttrium aluminium garnet) laser. The laser can fire 10 pulses within one burst at a frequency of 0.5Hz. Each pulse has ~3J power, with a deviation of less than 10%. By using a single laser instead of combining several lasers, the positional accuracy was improved and the Thomson scattering system can work for a longer time with a higher frequency. Furthermore, the stray light was suppressed, and the S/N (Signal to Noise) was improved by more than 10% while the spatial resolution was increased to 3mm in minor radius. These upgraded can promote the advanced physical researches on EAST, such as ELM migration, L-H transition, etc.

Primary author

Qing ZANG (Institute of Plasma Physics, Chinese Academy of Sciences)

Co-authors

Ailan Hu (Institute of Plasma Physics, Chinese Academy of Sciences) Xiaofeng Han (Institute of Plasma Physics, Chinese Academy of Sciences) Shumei Xiao (Institute of Plasma Physics, Chinese Academy of Sciences) Yong Che (Institute of Plasma Physics, Chinese Academy of Sciences) MengFang Ren (Institute of Plasma Physics, Chinese Academy of Sciences) Da Li (Institute of Plasma Physics, Chinese Academy of Sciences) C.L. Hsieh (General Atomics) Junyu Zhao

Presentation Materials

There are no materials yet.
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×