Dependence of laser-induced fluorescence on exciting-laser power: partial saturation and laser – plasma interaction

Logo poskytovatele
Logo poskytovatele

Varování

Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
Autoři

VORÁČ Jan DVOŘÁK Pavel PROCHÁZKA Vojtěch MORÁVEK Tomáš RÁHEĽ Jozef

Rok publikování 2015
Druh Článek v odborném periodiku
Časopis / Zdroj The European Physical Journal - Applied Physics
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://www.epjap.org/articles/epjap/abs/2015/08/ap150022/ap150022.html
Doi http://dx.doi.org/10.1051/epjap/2015150022
Obor Fyzika plazmatu a výboje v plynech
Klíčová slova laser-induced fluorescence; least-squares fitting; partial saturation; lifetime
Popis In recent publications on laser-induced fluorescence (LIF), the measurements are usually constricted to the region of weak exciting-laser power – the so called linear LIF. In this work, a practical formula F(E_L) = (alpha) *E_L / (1+(beta)*E_L) describing the dependence of partially saturated fluorescence on the exciting-laser power is derived, together with practical implementation suggestions and comments on its limitations. In the conclusion, the practical formula is proposed with the limitation for validity (beta)*EL = 0.4, where (alpha)*EL is the hypothetical linear fluorescence without saturation effects, and a more general formula is derived, which is valid for higher values of (alpha)*EL as well. Extending the range of exciting laser power to the region of partial saturation enhances the signal-to-noise ratio. Such measurements in a surface dielectric barrier discharge further reveal discharge disruption by photoelectrons emitted from the dielectric surface. Methods of control and solution of this problem are discussed.
Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.