Indexed by:
期刊论文
First Author:
Hai, Ran
Correspondence Author:
Ding, HB (reprint author), Dalian Univ Technol, Sch Phys & Opt Elect Technol, Chinese Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China.
Co-author:
Wu, Xingwei,Xin, Yu,Liu, Ping,Wu, Ding,Ding, Hongbin,Zhou, Yan,Cai, Laizhong,Yan, Longwen
Date of Publication:
2014-04-01
Journal:
JOURNAL OF NUCLEAR MATERIALS
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
447
Issue:
1-3
Page Number:
9-14
ISSN No.:
0022-3115
Abstract:
Our recent investigations have indicated that dual-pulse laser-induced breakdown spectroscopy (DP-LIBS) has great potential in the online measurement of the laser ablation process of the ultrathin co-deposition layer on the first mirrors of HL-2A tokamak during the cleaning. The spectroscopic study of the plasma emission can be used to determine the elemental composition of the ablated materials. The co-deposition layer (approximately 0.8 mu m) was completely removed after multiple pulses at 0.76 J/cm(2), but the plasma initiated by the cleaning laser pulse was too weak to produce LIBS signals. Notable enhancement of the signal emission was observed using DP-LIBS. The real-time monitoring and accurate identification the interface boundary can provide important information regarding the cleaned mirror surface in order to avoid under-cleaning. This could help us to develop more effective automatic control of the laser cleaning processes for fusion devices. (C) 2013 Elsevier B.V. All rights reserved.
Translation or Not:
no
