Sonu Sen
The interaction of intense short laser pulse with plasma involves a number of interesting nonlinear physical phenomenons, including the generation of quasi-static intense magnetic fields. The recent achievement of powerful short laser pulse has lead to renewal interest in interaction of radiation with matter into relativistic regime. The generation of magnetic field in high intensity laser-plasma interaction has received considerable attention these include fast electron and ion generation, indicating that ultra strong electric field and magnetic field are generated in the plasma.
The development of multi terawatt femtosecond lasers makes it possible to achieve a regime of laser matter interaction never reached before. New interaction mechanisms are being proposed theoretically to model the interaction, including the anomalous skin effect, hole boring and self induced transparency. During the interaction of an intense laser with plasma, a magnetic field is generated and betatron resonance occurs between the electron and the electric field of the laser, and the electrons are accelerated to high energies. In this new regime of high laser intensity the quiver velocity of electrons is relativistic; one of the main effects in laser plasma interaction is associated with the relativistic increase of the inertial electron mass and consequent lowering of the natural plasma frequency that may crucially modify the optical properties of plasma. The superintense electromagnetic radiation would be able to propagate through a classically overdense plasma due to the relativistic correction to the electron mass, the so-called induced transparency effect.
In the present paper we describe propagation of circularly polarized high-intensity laser radiation in plasmas. The propagation of an electromagnetic wave in magnetized plasma, in the so-called extraordinary mode has been considered. Such a wave field causes the plasma electrons to gyrate in the orbit whose radii depend on the radiation intensity, on the wave frequency and on the electron density. This gyration of the plasma electrons induces a magnetic field, which for the left circular polarization is parallel and for right circular polarization is antiparallel to the direction of wave propagation.
- Related Videos
- Related Articles
- Ask / Related Q&A
- Beam-steered Laser Marking of Plastics
- Do Laser Acne Treatments Work?
- Beam: -Steered Laser Marking of Plastics & Fundamentals
- Laser Choices-zero in on your Laser Specifications Before Buying
- The Basics of Laser Liposuction
- American Laser Clinics Part 1: Armed Guards & Threats
- Giant Eye Pupils Could Put Your Laser Eye Surgery in Jeopardy
- Smartlipo Laser Assisted Liposuction
The Shape of Space; A New and Simple Picture of Relativity
By: Chris Boyd | 24/12/2009The observed phenomena of a limit on the speed of light and time dilation at high velocity can be explained by the shape of space time without resorting to very onorous mathematics. Extending the picture to include a dimension os energy or mass completes the picture of relativity.
The Polar Regions
By: Simon Harding | 24/12/2009Polar Regions, Arctic and Antarctic Ice Cover, Polar organisms and adaptation to environment
Biological Evolution in the Oceans
By: Simon Harding | 24/12/2009Theories of how life originated in the oceans
How does a thermometer tell the temperature?
By: Chris Salue | 23/12/2009Bulb thermometers are most commonly found in two places--outside on our porches measuring the temperatures outside or under our tongues measuring our bodily temperatures.
Lightning is interesting, that is why lightning trackers do what they do
By: Paul Ingersole | 21/12/2009Tracking storms and lightning is a highly specialized process that most meteorologists are equipped to do. There are companies that sell special equipment to track lightning and the equipment can be rather expensive. That is why if you want to do it that you should price the equipment first. Look online and in general make sure that you are getting the best deals possible.
One of the basic concepts behind lightning safety is that water conducts electricity
By: Paul Ingersole | 21/12/2009Some regions of the country are particularly prone to thunder and lightning storms, but they can pretty much happen anywhere. That is why it is important for everyone to learn lightning safety. People who are outside are not the only ones at risk either. It is not uncommon for something like a tree on your property or a chimney to get struck by lightening.
Some areas of the country are really prone to getting lightening strikes
By: Paul Ingersole | 21/12/2009Some areas of the country are really prone to getting lightening strikes. That is why lightning rods are so important. Lightning strikes the tallest thing in an area. With areas that have hills, trees, and a diversity of landscape, that isn’t a problem.
During a lightning storm, clouds take on positive and negative charges
By: Paul Ingersole | 21/12/2009Viewing cloud to cloud lightning in the sky can be spectacular. Sometimes, there are so many offshoots as parts of the lightning bolt go to different clouds that you feel as if you are watching a fireworks display. This can be especially spectacular in an area that is clear and free from busy city life.
Relativistic ponderomotive self-focusing of a intense laser beam through inhomogeneous plasma with different density ramps
By: Sonu Sen | 04/07/2009 | ScienceIn the present work we make an analytical investigation of nonlinear propagation of intense laser pulse through inhomogeneous plasma with relativistic ponderomotive nonlinearity.A differential equation of the beam width parameter with the distance of propagation is derived including the effects of relativistic self-focusing and ponderomotive self-channeling.