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论文类型：期刊论文

发表时间：2013-07-01

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

收录刊物：SCIE、EI、CPCI-S

卷号：438

期号：SUPPL

页面范围：S1168-S1171

ISSN号：0022-3115

摘要：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.