Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization

2015 ◽  
Vol 106 (5) ◽  
pp. 054107 ◽  
Author(s):  
A. A. Morozov ◽  
A. B. Evtushenko ◽  
A. V. Bulgakov
Keyword(s):  
Laser Ablation ◽  
Gas Dynamic ◽  
Thermal Vaporization

scholarly journals Molecular Dynamics Simulations of Crater Formation Induced by Laser Ablation on the Surface of α-Fe Substrate

2018 ◽  
Vol 167 ◽  
pp. 03011
Author(s):  
Jenn-Kun Kuo ◽  
Pei-Hsing Huang ◽  
Shih-Kai Chien ◽  
Kuang-Yao Huang ◽  
Kun-Tso Chen
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Surface Morphology ◽  
Laser Fluence ◽  
Pulsed Laser ◽  
Md Simulations ◽  
Crater Formation ◽  
Thermal Vaporization ◽  
Dynamics Simulations ◽  
Pulsed Laser Irradiation

In this study, we employed molecular dynamics (MD) simulations to investigate ablation induced by the application of pulsed laser irradiation to a thin α-Fe substrate. We observed several mechanisms underlying the removal of material, including ultrafast melting, cluster ejection, and thermal vaporization. We also examined the effects of laser fluence on the resulting surface morphology as well as the amount of material ablated and deposited around the craters

Two-dimensional gas-dynamic model of laser ablation in an ambient gas

2000 ◽  
Vol 154-155 ◽  
pp. 66-72 ◽  
Author(s):  
A.V. Gusarov ◽  
A.G. Gnedovets ◽  
I. Smurov
Keyword(s):  
Laser Ablation ◽  
Dynamic Model ◽  
Two Dimensional ◽  
Gas Dynamic ◽  
Ambient Gas

An investigation of XeCl laser ablation of polyetheretherketone (PEEK)-carbon fiber composite

1992 ◽  
Vol 7 (5) ◽  
pp. 1152-1157 ◽  
Author(s):  
P.E. Dyer ◽  
S.T. Lau ◽  
G.A. Oldershaw ◽  
D. Schudel
Keyword(s):  
Electron Microscope ◽  
Laser Ablation ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Etch Rate ◽  
Fiber Composite ◽  
Xecl Laser ◽  
Carbon Fiber Composite ◽  
Thermal Vaporization ◽  
Scanning Electron

The XeCl laser ablation of a polyetheretherketone (PEEK)-carbon fiber composite (APC-2) is reported. Etch rates and measurements of the ablation products have been carried out, together with scanning electron microscope evaluation of the etch craters. Selective removal of the PEEK matrix occurs for fluences ∼70–400 mJ cm−2. Net composite etching commences at ∼420 mJ cm−2, with an etch rate above this value that is determined by the carbon fibers and is consistent with thermal vaporization at high temperature (≥4000 K).

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

153: Successful Gold Nanoshell Assisted Laser Ablation of Prostate Carcinoma in Vitro

2007 ◽  
Vol 177 (4S) ◽  
pp. 52-52
Author(s):  
Joshua M. Stem ◽  
Jer-Tsang Hsieh ◽  
Sangtae Park ◽  
Yair Lotan ◽  
Jeffrey A. Cadeddu
Keyword(s):  
Laser Ablation ◽  
Prostate Carcinoma ◽  
Gold Nanoshell
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