ASIPP Develops a High Resolution Thomson Scattering (TVTS) Diagnostic System

“This is God's smile”, said Dr Chung Lih Hsieh from General Atomics (GA), when he heard that the recently developed high resolution Thomson Scattering (TVTS) Diagnostic System has been proved to be capable of measuring plasma electron temperature after one month commissioning and trial running on HT-7 tokamak during its spring experiment campaign in May.

 TVTS is recognized as the most accurate method to measure plasma electron temperature, and it can also demonstrate plasma density profile.  Composed of high-energy laser, transfer optics, grating spectrometer, image intensifier, EMCCD system and data acquisition and analysis system, TVST is one of the most difficult diagnostics on tokamak devices.

　  Impressed by the rapid progress made by the small TS team at ASIPP, whose average age is under 30, Dr Chung Lih Hsieh, a Thomas Scattering (TS) expert, pleaded with ASIPP directorate for more stable hands and support to this young team, as TS is “difficult”.

　 Far from being self-content, TS team contribute the phase achievement to more than ten years’ accumulation of experience of other older scientists, kind help from and cooperation with their international collaborators, such as GA, Tokyo University and so on. They say they still need to work harder as it is a long way to catch up with the world level. （Han Xiaofeng Reports）