Dynamics of 248-nm laser produced plasmas above a metallic surface

Christophe Prat; Thierry Sarnet; Michel L. Autric; Georges Inglesakis

doi:10.1117/12.204888

31 March 1995 Dynamics of 248-nm laser produced plasmas above a metallic surface

Christophe Prat, Thierry Sarnet, Michel L. Autric, Georges Inglesakis

Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204888
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

Abstract

The energy transfer to a metallic sample and the resulting thermal coupling depend strongly on the experimental conditions: incident fluence and intensity, pulse duration, pressure and nature of the surrounding gas. In order to optimize laser-material processing such as surface treatment (ablation, control of roughness, changes of the hardness, residual stresses or surface compounds) the expansion of the produced plasma in front of the surface must be studied. The purpose of this paper is to present an experimental study concerning the characterization of different plasma regimes using an interferometric method and a fast image converter camera. The samples (Ti alloy) have been irradiated from 5 J/cm² to 130 J/cm² using a 248 nm laser radiation. The experiments have been performed in various ambient gases (nitrogen, argon, air, and helium) under different ambient pressures (10^-3 to 10⁵ Pa). Time-evolved structures (spherical blast wave, LSC, LSD) have been shown depending on the experimental conditions.

Citation Download Citation

Christophe Prat, Thierry Sarnet, Michel L. Autric, and Georges Inglesakis "Dynamics of 248-nm laser produced plasmas above a metallic surface", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204888

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available