Indexed by:Journal Papers

First Author:Zhang Lei

Correspondence Author:Ding, HB (reprint author), Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Chinese Minist Educ, Sch Phys & Opt Elect Technol, Dalian 116024, Peoples R China.

Co-author:Feng Chunlei,Xiao Qingmei,Hai Ran,Ding Hongbin

Date of Publication:2015-11-01

Journal:PLASMA SCIENCE & TECHNOLOGY

Included Journals:Scopus、EI、SCIE

Document Type:J

Volume:17

Issue:11

Page Number:958-963

ISSN:1009-0630

Key Words:carbon cluster; plasma-facing component (PFC); laser ablation; TOF mass spectrometry; graphite

Summary:In this work, a time-of-flight (TOF) mass spectrometer has been used to investigate the distribution of intermediate species and formation process of carbon clusters. The graphite sample was ablated by Nd:YAG laser (532 nm and 1064 nm). The results indicate that the maximum size distribution shifted towards small cluster ions as the laser fluence increased, which happened because of the fragmentation of larger clusters in the hot plume. The temporal evolution of ions was measured by varying the delay time of the ion extraction pulse with respect to the laser irradiation, which was used to provide distribution information of the species in the ablated plasma plume. When the laser fluence decreased, the yield of all of the clusters obviously dropped.