Angle Resolved Charge Collection Measurement from UV and Visible Laser Ablation of Graphite
Abstract
The purpose of this study was to investigate the interaction of high-power laser radiation with graphite and to determine the wavelength dependence on the ejection dynamics of the laser plume. The target was ablated by two different laser wavelengths (λ = 532 and 266 nm). Angular dependencies of intensity and velocity of the charged particles were obtained by Faraday cup measurements at various laser power densities. The most probable speed of the charged particles from UV laser ablation was faster than that from visible laser ablation. The velocity distribution of the charged particles from UV ablation shows less angular dependence then that from visible laser ablation. The reasons for these differences will be discussed.
- Publication:
-
APS Ohio Sections Fall Meeting Abstracts
- Pub Date:
- October 1999
- Bibcode:
- 1999APS..OSF..CF03H