Optical absorption in early stage low temperature laser produced plasma |
| |
Authors: | T Donnelly J G Lunney |
| |
Institution: | (1) School of Physics, Trinity College Dublin, Dublin, 2, Ireland |
| |
Abstract: | We describe a new technique to measure the UV/visible absorption spectrum of the ablated material during the laser pulse.
The technique utilizes the continuum emission from one laser produced plasma as a light source to measure the absorption properties
of a second laser produced plasma which is formed on a semi-transparent target with an array of 40 μm holes. A 6 ns, 1064
nm laser was used to ablate a Ag target and the plasma absorption was measured in the range 450–625 nm for a laser fluence
of 1 J cm−2. The total absorption cross-section is (0.5–1.5)×10−17 cm2 in the range 450–540 nm. By comparing the measured absorption with a calculation using the plasma spectroscopy code FLYCHK
it can be concluded that, in the wavelength region examined here, the absorption is mainly due to bound-bound transitions. |
| |
Keywords: | PACS" target="_blank">PACS 52 38 Mf 52 70 Kz 52 25 Os |
本文献已被 SpringerLink 等数据库收录! |
|