Plasma confinement by hemispherical cavity in laser-induced breakdown spectroscopy
Abstract
An aluminum hemispherical cavity (diameter: 11.1 mm) was used to confine plasmas produced by a KrF excimer laser in air from a steel target with a low concentration manganese in laser-induced breakdown spectroscopy. A significant enhancement (factor >12) in the emission intensity of Mn lines was observed at a laser fluence of 7.8 J/cm2 when the plasma was confined by the hemispherical cavity, leading to an increase in plasma temperature about 3600 K. The maximum emission enhancement increased with increasing laser fluence. The spatial confinement mechanism was discussed using shock wave theory.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 28, 2011
- Source ID
- 10.1063/1.3573807
Entities
People
- B. Y. Zhang
- C. M. Li
- L. B. Guo
- Wenyi Hu
- X. Y. Zeng
- Y. F. Lu
- Y. S. Zhou
- Z. X. Cai
Organizations
- Huazhong University of Science and Technology
- Office of Naval Research
- University of Nebraska–Lincoln