Product Code: ICAL05_M501

Characteristics and Dynamics of Magnetic-Confined Laser-Induced Silicon Plasmas in Atmosphere
Authors:
Y.X. Han, University of Nebraska-Lincoln; Lincoln NE USA
Yongfeng Lu, University of Nebraska-Lincoln; Lincoln NE USA
T. Gebre, University of Nebraska-Lincoln; Lincoln NE USA
Presented at ICALEO 2005

The characteristics and dynamics of laser-induced silicon plasmas under the confinement of magnetic field with different intensities in atmosphere have been investigated. A strong magnetic field up to 1.05 Tesla was produced by two permanent magnets. A KrF excimer laser with a wavelength of 248 nm and a pulse width of 23 ns was used to produce plasmas which expanded across the magnetic field. Fast photography, emission spectroscopy and time of flight spectroscopy were used as diagnostic methods. Significant changes in plasma life time, plume structure and dynamics were observed in the presence of the magnetic field. The results show that plasmas last longer with magnetic confinement. The relationship between plasma properties and intensities of magnetic field were studied.