Nonlinear penetration of an inhomogeneous laser beam in an overdense plasma
Abstract
This paper presents an analysis of the penetration of an intense electromagnetic beam in an inhomogeneous plasma. It is seen that on account of the electron density gradient created by an intense transversely inhomogeneous beam a region is created in the overdense plasma where the beam can propagate. Typically a CO2 laser beam of width r0=100 μm, power P=15 GW, and ω=1.7×1014 sec-1 can penetrate to a region where ω2pω2=20 in a 500-eV inhomogeneous plasma characterized by ω2pω2=(ω2p0ω2) (1+Bz).
- Publication:
-
Physical Review A
- Pub Date:
- November 1977
- DOI:
- 10.1103/PhysRevA.16.2101
- Bibcode:
- 1977PhRvA..16.2101S
- Keywords:
-
- Dense Plasmas;
- Laser Plasma Interactions;
- Plasma-Electromagnetic Interaction;
- Carbon Dioxide Lasers;
- Electromagnetic Absorption;
- Light Beams;
- Nonlinear Systems;
- Nonuniform Plasmas;
- Permittivity;
- Wave Equations;
- Plasma Physics