Hits:

Indexed by:期刊论文

Date of Publication:2013-07-01

Journal:20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI)

Included Journals:SCIE、EI、CPCI-S

Volume:438

Issue:SUPPL

Page Number:S1168-S1171

ISSN No.:0022-3115

Abstract:Our recent investigations have indicated that laser-induced breakdown spectroscopy (LIBS) may have great potential in the monitoring of the deposition features of plasma-facing materials (PFMs) in experimental advanced superconducting tokamak (EAST). Detailed information on these PFM can be obtained in real time by analyzing the spectra from 200 to 980 nm. The depth distribution of the main elements from PFMs of the EAST divertor was here investigated. The decrease in the concentrations of main deposed elements (such as Li, Fe, and Cr) were clearly observable after the first ten laser pulses at a laser power density of 5 x 10(9) W/cm(2). The concentrations of substrate elements were found to be uniformly distributed along the depth axis. The use of LIBS for the characterization of quasi three-dimensional multi-element distribution maps of the deposition of impurities in the gaps between divertor tiles is here presented. This significantly improves the understanding of the Li deposition behavior of EAST. (C) 2013 Elsevier B. V. All rights reserved.