The onset of uninhibited heat conduction and non-local absorption in flux-limited laser-plasma ablation

2021 ◽  
Vol 28 (6) ◽  
pp. 062704
Author(s):  
M. Ben Dov ◽  
N. Sapir ◽  
I. Pomerantz
Keyword(s):  
Heat Conduction ◽  
Laser Plasma ◽  
Plasma Ablation ◽  
Non Local

scholarly journals Macroscopic laser–plasma interaction under strong non-local transport conditions for coupled matter and radiation

2018 ◽  
Vol 3 (3) ◽  
pp. 110-126 ◽  
Author(s):  
J. Nikl ◽  
M. Holec ◽  
M. Zeman ◽  
M. Kuchařík ◽  
J. Limpouch ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Non Local ◽  
Local Transport

Correlation of Raman Spectra and Bonding in DLC Films Deposited by Laser Ablation and Laser-Plasma Ablation Techniques

1991 ◽  
Vol 250 ◽  
Author(s):  
A. Rengan ◽  
J. Narayan ◽  
J. L. Park
Keyword(s):  
Laser Ablation ◽  
Laser Plasma ◽  
Deposition Temperature ◽  
Plasma Deposition ◽  
Raman Shift ◽  
Plasma Ablation ◽  
Valence Electrons ◽  
Diamondlike Carbon ◽  
Plasma Deposited Films ◽  
Deposited Films

AbstractWe have deposited diamondlike carbon (DLC) films on a variety of substrates from 250° C and higher. The effects of deposition temperature on the properties of DLC films deposited by a conventional laser ablation technique are compared with that of a unique laser-plasma deposition scheme. The calculated values of neff, the effective number of valence electrons, suggest that, with the increase in the deposition temperature, the diamondlike component (sp3 bonds) remains invariant for the laser deposited samples, and increases for the laser-plasma deposited films. Raman measurements show that the Raman allowed ‘G’ band upshifts to ˜1600 cm−1 for both deposition schemes. However, the disorder induced 'D' band remains invariant at ˜1370 cm−2 for the laser ablated samples, and downshifts to ˜1350 cm−1 for the laser-plasma deposited samples. These results suggest a correlation between the diamondlike content (sp3 bonds) and the Raman shift of the ‘D’ band.

Characteristics of diamond-like carbon films formed by a hybrid laser-plasma ablation of graphite

1992 ◽  
Vol 15 (1) ◽  
pp. 15-24 ◽  
Author(s):  
A. Rengan ◽  
J. Narayan ◽  
C. Jahnke ◽  
S. Bedge ◽  
J.L. Park ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Plasma Ablation

Models of laser plasma ablation. Part 4. Steadystate theory: collisional absorption flow

1993 ◽  
Vol 49 (2) ◽  
pp. 295-316 ◽  
Author(s):  
G. J. Pert
Keyword(s):  
Laser Ablation ◽  
Laser Plasma ◽  
Thermal Conduction ◽  
Plasma Heating ◽  
Scaling Relations ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Plasma Ablation ◽  
Complete Set ◽  
Dimensional Argument

The clarification of models of laser ablation by plasma heating is examined using a general dimensional argument and introducing a set of universal parameters. The regime of laser-plasma interaction in which collisional absorption and thermal conduction dominate is examined for spherical systems. Detailed scaling relations are derived for uninhibited and flux-limited thermal conduction. The complete set of regimes for steady spherical flow are examined, and it is found that the most important flows are thin collisional and thick local absorption.

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