Self-focusing effect in Au-target induced by high power pulsed laser at PALS

L. Torrisi; D. Margarone; L. Laska; J. Krasa; A. Velyhan; M. Pfeifer; J. Ullschmied; L. Ryc

doi:10.1017/S0263034608000396

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

L. Torrisi^*, D. Margarone, L. Laska, J. Krasa, A. Velyhan, M. Pfeifer, J. Ullschmied, L. Ryc

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 10¹⁶ W/cm². Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200μm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.

Original language	English
Pages (from-to)	379-387
Number of pages	9
Journal	Laser And Particle Beams
Volume	26
Issue number	3
DOIs	https://doi.org/10.1017/S0263034608000396
Publication status	Published - Sep 2008
Externally published	Yes

Bibliographical note

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

Laser focalization
Laser-generated plasma
Plasma density
Plasma temperature
Self-focusing

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1017/S0263034608000396

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title = "Self-focusing effect in Au-target induced by high power pulsed laser at PALS",

abstract = "Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 1016 W/cm2. Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200μm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.",

keywords = "Laser focalization, Laser-generated plasma, Plasma density, Plasma temperature, Self-focusing",

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T1 - Self-focusing effect in Au-target induced by high power pulsed laser at PALS

AU - Torrisi, L.

AU - Margarone, D.

AU - Laska, L.

AU - Krasa, J.

AU - Velyhan, A.

AU - Pfeifer, M.

AU - Ullschmied, J.

AU - Ryc, L.

PY - 2008/9

Y1 - 2008/9

N2 - Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 1016 W/cm2. Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200μm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.

AB - Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 1016 W/cm2. Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200μm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.

KW - Laser focalization

KW - Laser-generated plasma

KW - Plasma density

KW - Plasma temperature

KW - Self-focusing

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