Relativistic Self Focusing of Short Pulse Radiation Beams in Plasmas.
BERKELEY SCHOLARS INC SPRINGFIELD VA
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An envelope equation is derived which describes the radial evolution of a radiation beam propagating through a plasma. The radiation envelope equation contains a defocusing term due to diffraction spreading and a focusing term due to relativistic oscillations of the plasma electrons. The case of a constant density background plasma is analyzed in detail and an expression for a critical laser power is derived. For powers exceeding the critical power the radiation envelope oscillators and does not diffract. Under certain conditions, the radiation beam propagates through the plasma with a constant radius envelope. Keywords Self focusing Laser plasma interactions Radiation propagation Envelope equation Relativistic plasma.
- Electricity and Magnetism
- Plasma Physics and Magnetohydrodynamics
- Fusion Devices (Thermonuclear)