Picosecond and Nanosecond Laser Ablation of Mixed Tungsten/Aluminum Films

2014 ◽  
Vol 66 (2) ◽  
pp. 308-314 ◽  
Author(s):  
M. Wisse ◽  
L. Marot ◽  
R. Steiner ◽  
D. Mathys ◽  
A. Stumpp ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nanosecond Laser ◽  
Aluminum Films ◽  
Nanosecond Laser Ablation

Modeling of Pressure Evolution During Nanosecond Laser Ablation of Metal Films

2009 ◽  
Author(s):  
Mohammad Hendijanifard ◽  
David A. Willis
Keyword(s):  
Shock Wave ◽  
Laser Ablation ◽  
Pulse Width ◽  
Metal Films ◽  
Normal Shock ◽  
Nanosecond Laser ◽  
Time Resolved ◽  
Aluminum Films ◽  
Nanosecond Laser Ablation ◽  
Fluid Properties

Nanosecond laser ablation is studied using a theoretical model combined with experimental data from laser ablation of metal films. The purpose of the research is to obtain the recoil pressure boundary condition resulting from explosive phase change. The ablation experiments are performed using a Nd:YAG laser of 1064 nm wavelength and 7 ns pulse width at full width half maximum. Three samples, 200 and 1000 nm aluminum films and 1000 nm nickel films, are used in the experiments. The transient shock wave positions are obtained by a time-resolved shadowgraph technique. A N2-laser pumped dye laser with 3 ns pulse width is used as an illumination source and is synchronized with the ablation laser to obtain the transient shock wave position with nanosecond resolution. The transient shock position is used in a model for finding the shock wave speed as well as the pressure, temperature, and velocity just behind the shock wave. A power law is used for fitting curves on the experimentally obtained shock wave position. Knowing the shock wave position, the normal shock equations are used to calculate the thermo-fluid properties behind the shock wave. The solutions are compared with the Taylor-Sedov solution for spherical shocks and the reason for the deviation is described. The thermo-fluid property results show similar trends for all tested samples. The results show that the Taylor-Sedov solution under-estimates the pressure behind the shock wave when compared to the normal shock results.

scholarly journals Micro- and nanoparticle generation during nanosecond laser ablation: correlation between mass and optical emissions

2014 ◽  
Vol 22 (4) ◽  
pp. 3991 ◽  
Author(s):  
Santiago Palanco ◽  
Salvatore Marino ◽  
M. Gabás ◽  
Shanti Bijani ◽  
Luis Ayala ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nanosecond Laser ◽  
Optical Emissions ◽  
Nanosecond Laser Ablation ◽  
Nanoparticle Generation

scholarly journals Single-shot, double-pulse determination of the detonation energy in nanosecond-laser ablation using the blast model

2021 ◽  
Vol 29 (21) ◽  
pp. 33481
Author(s):  
L. A. Nagel ◽  
P. J. Skrodzki ◽  
L. A. Finney ◽  
R. Nawara ◽  
M. Burger ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Double Pulse ◽  
Nanosecond Laser ◽  
Single Shot ◽  
Nanosecond Laser Ablation ◽  
Detonation Energy
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