Repositorio Atenea de la Facultad de Ciencias, UNAM >
Repositorio Ciencias >
FACULTAD DE CIENCIAS >
Ciencias >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/2267
|
Title: | Real time measurement of the electron density of a laser generated plasma using a RC circuit |
Authors: | Bredice, F Sobral, H Villagran-Muniz, M Di Rocco, HO Cristoforetti, G Legnaioli, S Palleschi, V Salvetti, A Tognoni, E |
Issue Date: | 2007 |
Abstract: | A Nd:YAG laser pulse was focused, in air or on a Cu target, between the plates of a planar charged capacitor. The plasma generates a transient redistribution of the electrical charges on the plates that can be easily measured as a voltage drop across a resistor connected to the ground plate. At the same time, the Stark broadening of the H. spectral line (656.3 nm) obtained from the optical emission spectrum of the plasma was measured. In this work, we show that the peak of electrical signal measured on the resistor is, in the energy range of our laser (30 mJ to 220 mJ) and at time delays typical of Laser-Induced Breakdown Spectroscopy applications (500-5000 ns), univocally related to the temporal evolution of the Stark broadening of the H, line. Therefore, after a proper calibration depending on the material and the experimental geometry, the peak of the electrical signal can be used to predict the temporal evolution of the electron density of the generated plasma. (c) 2007 Elsevier B.V All rights reserved. |
URI: | http://hdl.handle.net/11154/2267 |
ISSN: | 0584-8547 |
Appears in Collections: | Ciencias
|
Files in This Item:
There are no files associated with this item.
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|