Improvement of the preparation procedure of carbon stripper foils from the laser plasma ablation-deposition process

1997 ◽  
Vol 397 (1) ◽  
pp. 131-136 ◽  
Author(s):  
P Maier-Komor ◽  
A Bergmaier ◽  
G Dollinger ◽  
C.M Frey ◽  
H.J Körner
Keyword(s):  
Laser Plasma ◽  
Deposition Process ◽  
Preparation Procedure ◽  
Plasma Ablation ◽  
Carbon Stripper Foils

Growth Mechanism and Film Properties in Pulsed Laser-Plasma Deposition

1991 ◽  
Vol 236 ◽  
Author(s):  
S. Metev ◽  
K. Meteva
Keyword(s):  
Laser Plasma ◽  
Growth Process ◽  
Plasma Deposition ◽  
Pulsed Laser ◽  
Deposition Process ◽  
Experimental Investigations ◽  
Direct Relation ◽  
Film Properties ◽  
Experimental Conditions ◽  
Laser Flux

AbstractIn the paper the results of a theoretical investigation of the growth process of laser-plasma deposited thin films are discussed. A kinetic approach has been used to establish direct relation between experimental conditions (laser flux density, substrate temperature) and film properties (thickness, structure). The results of some experimental investigations of the deposition process are presented confirming the general conclusions of the developed theoretical model.

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.

Models of laser-plasma ablation

1986 ◽  
Vol 35 (1) ◽  
pp. 43-74 ◽  
Author(s):  
G. J. Pert
Keyword(s):  
Numerical Simulation ◽  
Laser Plasma ◽  
External Heat ◽  
Functional Relationships ◽  
External Heat Source ◽  
Plasma Ablation ◽  
Dense Fluid ◽  
Limited Mass ◽  
Self Similar ◽  
Small Targets

Dimensional analysis is used to predict the functional relationships amongst the characteristic variables of the ablation of a cold dense fluid by an imposed external heat source. From these relations, self-similar limiting forms are identified and evaluated. Numerical simulation is used to investigate the interpolation between these limits. Self-similar forms generalizing well-known existing solutions of relevance to laser-plasma are demonstrated and include a general proof of Nemchinov's hypothesis for the heating of small targets of limited mass.

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