Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1824561 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2011 | 5 Pages |
Abstract
At DMFCI of Catania University, where a Quanta System Nd:YAG laser 600Â mJ of energy, 1064Â nm wavelength and 6Â ns pulse length operates, experiments about plasma expansion in vacuum (<10â5Â mbar), have been performed. Our studies are mostly devoted to nuclear and astrophysical purposes. Some preliminary investigations with aluminum thick targets are reported here. Plasma dynamics have been investigated mainly by means of a movable Langmuir Probe, and time of flight spectra have been acquired at different distances from the laser-target interaction area. The cross-correlation of Langmuir probe signals and hydro-dynamical simulation has permitted to calculate the structure of the inner plasma self-generated electric field that drives the plume expansion. The experimental data reveals also a time variable behavior of the self-generated field. This dependence on time produces also a multi-shell plasma in which the different layers expand with a given velocity, temperature and density.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
S. Tudisco, D. Mascali, N. Gambino, A. Anzalone, S. Gammino, F. Musumeci, A. Scordino, A. Spitaleri,