点击次数：

论文类型： 期刊论文

发表时间： 2015-11-01

发表刊物： PLASMA SCIENCE & TECHNOLOGY

收录刊物： SCIE、EI、Scopus

卷号： 17

期号： 11

页面范围： 958-963

ISSN号： 1009-0630

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

摘要： 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.