scholarly journals Fundamental mechanisms of nanosecond-laser-ablation enhancement by an axial magnetic field

2019 ◽  
Vol 36 (4) ◽  
pp. 1091 ◽  
Author(s):  
Hamid Farrokhi ◽  
Vitaly Gruzdev ◽  
Hongyu Zheng ◽  
Wei Zhou
Keyword(s):  
Magnetic Field ◽  
Laser Ablation ◽  
Axial Magnetic Field ◽  
Nanosecond Laser ◽  
Nanosecond Laser Ablation

Magnetic Field Effects on Laser Drilling

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Chang Ye ◽  
Gary J. Cheng ◽  
Sha Tao ◽  
Benxin Wu
Keyword(s):  
Magnetic Field ◽  
Laser Ablation ◽  
Laser Drilling ◽  
Nanosecond Laser ◽  
Drilling Process ◽  
Magnetic Field Effects ◽  
Drilling Depth ◽  
Field Effects ◽  
Nanosecond Laser Ablation ◽  
The Magnetic Field

A magnetic field-assisted laser drilling process has been studied, where nanosecond laser ablation is performed under an external magnetic field. The study shows that the magnetic field-assisted laser drilling process produces deeper drilling depth and generates more confined plasma plume and relative less residual, as compared with laser drilling without magnetic field. This phenomenon has been rarely reported in the literature. The magnetic field effects on laser ablation have been analyzed analytically and a hypothesized explanation has been proposed based on the effect of the magnetic field on the plasma produced during laser ablation.

The Investigation of Plasma Produced by Intense Nanosecond Laser Ablation in Vacuum Under External Magnetic Field Using a Two-Stage Model

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Sha Tao ◽  
Benxin Wu ◽  
Yun Zhou ◽  
Gary J. Cheng
Keyword(s):  
Magnetic Field ◽  
Laser Ablation ◽  
External Magnetic Field ◽  
Nanosecond Laser ◽  
Stage Model ◽  
Hydrodynamic Equations ◽  
Two Stage ◽  
Nanosecond Laser Ablation ◽  
Term Evolution ◽  
Stage Stage

In this paper a two-stage physics-based model has been applied to study the evolution of plasma produced by high-intensity nanosecond laser ablation in vacuum under external magnetic field. In the early stage (Stage I), the laser-induced plasma generation and its short-term evolution are described through one-dimensional (1D) hydrodynamic equations. An equation of state (EOS) that can cover the density and temperature range in the whole physical domain has been applied to supplement the hydrodynamic equations. In the later stage (Stage II), the plasma long-term evolution is simulated by solving 2D gas dynamic equations. The two-stage model can predict the spatial distributions and temporal evolutions of plasma temperature, density, velocity, and other parameters. The model is used to study and discuss the effects of external magnetic field on the plasma evolution. It provides a useful tool for related fundamental studies and practical applications.

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
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