Affiliation:
1. Graduate School of Science and Engineering, Doshisha University , 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
Abstract
Ion energy of laser plasmas produced by repeated nanosecond pulsed laser ablation of graphite is measured by time-of-flight (TOF) spectrometry and retarding potential analysis. An Nd:YAG laser with λ=1064 nm wavelength is incident toward the center of a cylindrical graphite target while the target is rotated along its axis. Ion energy distributions are measured via TOF spectroscopy. TOF signals show a decrease in the ion peak current by half followed by shifting of the signals by 4 μs toward later times after 10 000 laser shots. An ion energy decrease of 200 eV was measured from the retarding potential analysis.
Subject
Materials Chemistry,Electrical and Electronic Engineering,Surfaces, Coatings and Films,Process Chemistry and Technology,Instrumentation,Electronic, Optical and Magnetic Materials