Nonlinear Thomson scattering of intense laser pulse from beams and plasmas
Abstract
A Comprehensive theory is developed to describe the nonlinear Thomson scattering of intense laser fields from beams and plasmas. This theory is valid for linearly or circularly polarized incident laser fields of arbitrary intensities and for electrons of arbitrary energies. Explicit expressions for the intensity distributions of the scattered radiation are calculated and numerically evaluated. The spacecharge electrostatic potential, which is important in high density plasmas and prevents the axial drift of electrons, is included selfconsistently. Various properties of the scattered radiation are examined, including the linewidth, angular distribution, and the behavior of the radiation spectra at ultrahigh intensities. Nonideal effects, such as electron energy spread and beam emittance, are discussed. A laser synchrotron source (LSS), based on nonlinear Thomson scattering, may provide a practical method for generating tunable, near monochromatic, well collimated, short pulse xrays in a compact, relatively inexpensive source. Two examples of possible LSS configurations are presented: an electron beam LSS generating hard (30 keV, 0.4 A) xrays; and a plasma LSS generating soft (0.3 keV, 40 A) xrays. These LSS configurations are capable of generating ultrashort (approximately 1 ps) xray pulses with high peak flux (greater than 10(exp 21) photons/s) and brightness (greater than 10(exp 19) photons/ssq mmsq mrad 0.1% BW).
 Publication:

Naval Research Lab. Report
 Pub Date:
 August 1993
 Bibcode:
 1993nrl..reptS....E
 Keywords:

 Electron Energy;
 Electrostatics;
 Laser Plasma Interactions;
 Laser Plasmas;
 Nonlinearity;
 Pulsed Lasers;
 Space Charge;
 Synchrotron Radiation;
 Thomson Scattering;
 Angular Distribution;
 Brightness;
 Electron Beams;
 Electrons;
 Emittance;
 Radiation Spectra;
 Synchrotrons;
 Lasers and Masers