Mass spectrometric analysis of the Mg plasma produced by double-pulse femtosecond laser irradiation

2018 ◽  
Vol 33 (8) ◽  
pp. 1292-1303 ◽  
Author(s):  
M. Tulej ◽  
R. Wiesendanger ◽  
A. Riedo ◽  
G. Knopp ◽  
P. Wurz
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Ablation ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Space Research ◽  
Double Pulse ◽  
Femtosecond Laser Irradiation ◽  
Spectrometric Analysis

The capabilities of a double-pulse femtosecond laser ablation ionisation source for the integration into a miniature time-of-flight LIMS system designed for space research are investigated.

Molecular Dynamics Study of Mechanism of Ablation Induced by a Femtosecond Laser Pulse

2003 ◽  
Author(s):  
Changrui Cheng ◽  
Xianfan Xu
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Critical Point ◽  
Change Process ◽  
Femtosecond Laser Ablation ◽  
Md Simulations ◽  
Femtosecond Laser Irradiation ◽  
Transient Temperature

In this work, molecular dynamics (MD) simulations are carried out to study femtosecond laser ablation of a metal, with an emphasis on the understanding of the mechanism of laser ablation. Theoretically, it has been shown that under intense femtosecond laser irradiation, the material can undergo a volumetric phase change process; its temperature can be close to or even above the critical point. MD simulations allow us to determine the transient temperature of the irradiated material as well as the transient thermodynamic state, which explain the mechanisms of femtosecond laser ablation.

Molecular Dynamics Study of Phase Change Mechanisms During Femtosecond Laser Ablation

2004 ◽  
Vol 126 (5) ◽  
pp. 727-734 ◽  
Author(s):  
Xianfan Xu ◽  
Changrui Cheng ◽  
Ihtesham H. Chowdhury
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Phase Change ◽  
Change Process ◽  
Femtosecond Laser Ablation ◽  
Femtosecond Laser Irradiation ◽  
Maximum Temperature ◽  
Transient Temperature ◽  
Phase Change Process

In this work, Molecular Dynamics (MD) simulation is employed to investigate femtosecond laser ablation of copper, with an emphasis on the understanding of the mechanism of phase change during laser ablation. Laser induced heat transfer, melting, surface evaporation, and material ablation are studied. Theoretically, it has been suggested that under intense femtosecond laser irradiation, the material undergoes a volumetric phase change process; its maximum temperature can be close to or even above the thermodynamic critical point. The MD simulations allow us to determine the transient temperature history of the irradiated material and to reveal the exact phase change process, which explains the mechanisms of femtosecond laser ablation. A finite difference calculation is also performed, which is used to compare results of heating and melting prior to a significant amount of material being ablated.

Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

2016 ◽  
Vol 18 (5) ◽  
pp. 3522-3529 ◽  
Author(s):  
Ignacio Lopez-Quintas ◽  
Vincent Loriot ◽  
David Ávila ◽  
Jesus G. Izquierdo ◽  
Esther Rebollar ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Ultrafast Laser ◽  
Double Pulse ◽  
Femtosecond Laser Irradiation ◽  
Pulse Irradiation ◽  
Highly Sensitive ◽  
Ultrafast Laser Pulse

The ablation dynamics of Co/ZnS is highly sensitive to the details of an ultrafast laser pulse irradiation sequence.

Double-pulse femtosecond laser ablation of the surface of stainless steel with variable interpulse delays

JETP Letters ◽  
2016 ◽  
Vol 104 (6) ◽  
pp. 421-424 ◽  
Author(s):  
E. I. Ageev ◽  
V. Yu. Bychenkov ◽  
V. P. Veiko ◽  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Double Pulse

Suppression of ablation by double-pulse femtosecond laser irradiation

2018 ◽  
Author(s):  
Masaki Hashida ◽  
Shinichiro Masuno ◽  
Yuki Furukawa ◽  
Mitsuhiro Kusaba ◽  
Shunsuke Inoue ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Double Pulse ◽  
Femtosecond Laser Irradiation

scholarly journals Double-pulse femtosecond laser ablation for synthesis of ultrasmall carbon nanodots

2020 ◽  
Vol 7 (1) ◽  
pp. 015606 ◽  
Author(s):  
Vanthan Nguyen ◽  
Na Zhao ◽  
Lihe Yan ◽  
Peng Zhong ◽  
Van Canh Nguyen ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Double Pulse ◽  
Carbon Nanodots

Femtosecond Laser Ablation of Titanium and Silicon

2000 ◽  
Author(s):  
Mengqi Ye ◽  
Costas P. Grigoropoulos
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Laser System ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Femtosecond Laser Irradiation ◽  
Nanosecond Laser ◽  
Iccd Camera ◽  
Plume Emission

Abstract Femtosecond laser ablation of titanium and silicon samples has been studied via time-of-flight (TOF), emission spectroscopy and microscopy measurement. Laser pulses of around 100 fs (FWHM) at λ = 800 nm were delivered by a Ti:sapphire femtosecond laser system. A vacuum chamber with a base pressure of 10−7 torr was built for ion TOF measurement. These ion TOF spectra were utilized to determine the velocity distribution of the ejected ions. While nanosecond laser ablation typically generates ions of a few tens of eV, femtosecond laser irradiation even at moderate energy densities can produce energetic ions with energies of up to a few keV. The most probable energy of these fast ions is proportional to the laser fluence. The structure and number of peaks of the TOF spectra varies with the laser fluence. Images of plume emission were captured by an intensified CCD (ICCD) camera. The plume emission spectrum was analyzed by a spectrometer. Laser ablated craters were measured by an interferometric microscope and a scanning electron microscope (SEM). Ablation yield was expressed as a function of laser fluence, and number of shots.

scholarly journals Explosives sensing using Ag–Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation

RSC Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 1517-1525 ◽  
Author(s):  
Moram Sree Satya Bharati ◽  
Byram Chandu ◽  
S. Venugopal Rao
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Ablation ◽  
Alloy Nanoparticles ◽  
Step Process ◽  
Cu Alloy

Herein we demonstrate the synthesis of Ag–Cu alloy NPs through a consecutive two-step process; laser ablation followed by laser irradiation.

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