Indexed by:期刊论文
Date of Publication:2017-02-01
Journal:PLASMA SCIENCE & TECHNOLOGY
Included Journals:SCIE、EI
Volume:19
Issue:2
ISSN No.:1009-0630
Key Words:tokamak; laser-induced breakdown spectroscopy; impurity deposition; fuel retention; plasma wall interaction
Abstract:Post-mortem methods cannot fulfill the requirement of monitoring the lifetime of the plasma facing components (PFC) and measuring the tritium inventory for the safety evaluation. Laser-induced breakdown spectroscopy (LIBS) is proposed as a promising method for the in situ study of fuel retention and impurity deposition in a tokamak. In this study, an in situ LIBS system was successfully established on EAST to investigate fuel retention and impurity deposition on the first wall without the need of removal tiles between plasma discharges. Spectral lines of D, H and impurities (Mo, Li, Si, ...) in laser-induced plasma were observed and identified within the wavelength range of 500-700 nm. Qualitative measurements such as thickness of the deposition layers, element depth profile and fuel retention on the wall are obtained by means of in situ LIBS. The results demonstrated the potential applications of LIBS for in situ characterization of fuel retention and co-deposition on the first wall of EAST.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:大连理工大学
Degree:Doctoral Degree
School/Department:物理学院
Discipline:Plasma physics
Open time:..
The Last Update Time:..