Diagnostics of target-cavity confined plasmas produced by nanosecond pulsed laser ablation of graphite

• Main Authors: Hernandez, J.E., Ii (Author), Wada, M. (Author)
• Format: Article
• Language: English
• Published: AVS Science and Technology Society 2023
• Subjects: 1064 nm; Confined plasmas; Graphite; Graphite target; Ion energies; Ion energy distributions; Ions; Laser ablation; Laser diagnostics; Laser produced plasmas; Nanosecond pulsed laser; Nd:YAG laser; Neodymium lasers; Plasma interactions; Potential analysis; Pulsed laser ablation; Pulsed lasers; Time-of-flight spectrometry; Yttrium aluminum garnet
• Online Access: View Fulltext in Publisher
• ISBN: 21662746 (ISSN)
• ISSN: 21662746 (ISSN)
• DOI: 10.1116/6.0002500

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. © 2023 Author(s).