Transient Filamentation of a Laser Beam in a Thermal Force Dominated Plasma

نویسندگان

  • A. K. Lal
  • K. A. Marsh
  • C. E. Clayton
  • C. Joshi
  • C. J. McKinstrie
  • J. S. Li
  • T. W. Johnston
چکیده

A. K. Lal,1 K. A. Marsh,1 C. E. Clayton,1 C. Joshi,1 C. J. McKinstrie,2 J. S. Li,2 and T. W. Johnston3 1Electrical Engineering Department, University of California, Los Angeles, California 90024 2Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627 and Laboratory for Laser Energetics, 250 East River Rd.Rochester, New York 14623 3Institute National de la Recherche Scientifique Energie, Quebec, Canada (Received 13 August 1996)

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Thermal Analysis of Laser Hardening for Different Moving Patterns

Transient thermal field in laser surface hardening treatment of medium carbon steel was analyzed by employing both three-dimensional analytical model and finite element model. In finite element model the laser beam was considered as a moving plane heat flux to establish the temperature rise distribution in the work-piece, while in analytical model laser beam was considered as an internal heat s...

متن کامل

Fluid description of collisional current filamentation instability of a weakly ionized plasma in the presence of magnetic field

In this paper, the collisional filamentation instability of an electron beam-weakly magnetized and ionized plasma has been investigated in the presence of background plasma, using the fluid description. By describing the equilibrium configuration in the presence of binary collision terms between charged and neutral particles and using the local approximation method, the dispersion relation (DR)...

متن کامل

Numerical simulation of filamentation in laser-plasma interactions

Numerical studies of beam filamentation in laser-produced plasma are presented. This involves the numerical solution of the parabolic wave equation. known as the Schrodinger equation, coupled with the thermal transport equations for both ions and electrons, in two dimensions. The solutionof the resultingequationwith non-linear refractive index due to thermal and pondermotive forces. shows self-...

متن کامل

Nonlinear Propagation of a Femtosecond Laser Pulse in Gases: Properties and Applications

When an intense femtosecond laser pulse propagates in a gas, it undergoes fila-mentation, a spectacular process where the pulse spatial, spectral and temporalcharacteristics change considerably. A thin short-lived plasma column is formed inthe wake of the propagating pulse. My PhD work has been dedicated to the furtherunderstanding of the filamentation process. In a first pa...

متن کامل

Analysis of the theory of thermal damage in biological tissues caused by Laser beam

Introduction: In laser surgery, the laser beam can evaporate and cut the tissue like a small surgical knife when the tissue temperature is heated to 100 degrees Celsius. a complete understanding of the distribution of damage in both pathologic tissue and surrounding tissue is necessary. Although the test is the most realistic solution for treating medical problems, for this rea...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1997