Absorption of laser radiation by a target in the case of a ponderomotive force and a finite thermal conductivity

1992 ◽  
Vol 22 (12) ◽  
pp. 1109-1112 ◽  
Author(s):  
S A Bel'kov ◽  
Sergey G Garanin ◽  
G V Dolgoleva ◽  
Yu F Kir'yanov ◽  
G G Kochemasov
Keyword(s):  
Thermal Conductivity ◽  
Laser Radiation ◽  
Ponderomotive Force

scholarly journals Formation of a waveguide having the ultimately small cross-section due to self-consistent propagation of a highly intensive laser beam (1018 W/cm2) with duration of 100 ps in an overdense plasma

1999 ◽  
Vol 17 (3) ◽  
pp. 391-394
Author(s):  
G.G. KOCHEMASOV ◽  
L.S. MKHITARYAN ◽  
B.A. VOINOV
Keyword(s):  
Laser Radiation ◽  
Laser Beam ◽  
Cross Section ◽  
Ponderomotive Force ◽  
Initial Density ◽  
Small Cross Section ◽  
Helmholtz Equations ◽  
Laser Radiation Pulse ◽  
Overdense Plasma ◽  
Fluid Hydrodynamics

Here we study the problem of a focused laser beam propagation in plasma with the initial density, which is much higher than the critical one. The Helmholtz equations, together with the equations of single fluid hydrodynamics, with the relativistic ponderomotive force were solved. It was shown that the stable waveguide with the cross-section of wavelength size was formed when plasma was affected by the laser radiation with the intensity exceeding the critical one while the laser radiation pulse was as long as (10–100) ps.

scholarly journals Double layer acceleration by laser radiation

2014 ◽  
Vol 32 (2) ◽  
pp. 211-216 ◽  
Author(s):  
Shalom Eliezer ◽  
Noaz Nissim ◽  
José Maria Martínez Val ◽  
Kunioki Mima ◽  
Heinrich Hora
Keyword(s):  
Laser Radiation ◽  
Pulse Duration ◽  
Double Layer ◽  
Radiation Pressure ◽  
Ponderomotive Force ◽  
Acceleration Process ◽  
Laser Target ◽  
Target Interaction ◽  
Rayleigh Taylor Instability ◽  
Rt Instability

AbstractIt is shown that it is possible to accelerate micro-foils to velocities from 108 cm/s up to relativistic velocities without the disturbance of the Rayleigh-Taylor instability. The acceleration occurs due to the radiation pressure of proper high power lasers. In these systems, the ablation force is negligible relative to the ponderomotive force that dominates the acceleration. The laser irradiances of 1017 W/cm2 < IL < 1021 W/cm2 with a pulse duration of the order of 10 picoseconds can accelerate a micro-foil by the laser radiation pressure to velocities as high as 109 cm/s before breaking by Rayleigh Taylor (RT) instability. Similarly, laser irradiances of IL > 1021 W/cm2 with pulse duration of the order of 10 femtoseconds can accelerate a micro-foil to relativistic velocities without RT breaking. Due to the nature of the accelerating ponderomotive force, in both the relativistic and non-relativistic cases, the structure of the accelerated target contains a double layer (DL) at the interface of the laser-target interaction. The DL acts as a piston during the acceleration process. The influence of the DL surface tension on the RT instability is also analyzed in this paper.

HARDNESS AND THERMAL CONDUCTIVITY OF As-Se-Te CHALCOGENIDE GLASSES

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-931-C4-934 ◽  
Author(s):  
M. F. Kotkata ◽  
M.B. El-den
Keyword(s):  
Thermal Conductivity ◽  
Chalcogenide Glasses

PHASE CONJUGATION OF KrF LASER RADIATION

1983 ◽  
Vol 44 (C2) ◽  
pp. C2-19-C2-25
Author(s):  
M. C. Gower ◽  
R. G. Caro
Keyword(s):  
Laser Radiation ◽  
Phase Conjugation ◽  
Krf Laser

A STUDY OF THE Pb PRECIPITATION IN NaCl FROM THERMAL CONDUCTIVITY EXPERIMENTS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-893-C6-895
Author(s):  
M. Locatelli ◽  
R. Suchail ◽  
E. Zecchi
Keyword(s):  
Thermal Conductivity
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