Experimental observation and investigation of energy exchange between an electron beam and counterpropagating laser beams in a Compton-scattering free-electron-laser scheme
We report the observation and investigation of synchronous energy exchange between nonrelativistic electrons and the ponderomotive (beat) force of two counterpropagating intense pulsed CO/sub 2/ laser beams, operating at different frequencies in a stimulated Compton-scattering scheme. The interaction occurred in the nonlinear (trapping) regime, the physics of which is the same as that which occurs in laser accelerators and efficiency-enhanced free-electron lasers (FEL's) with long wigglers. The experiment is a first demonstration of the principle of inverse FEL acceleration and electromagnetic pump FEL operation in the nonlinear (trapping) regime. It can also be described as a demonstration of a ''traveling beat-wave'' Kapitza-Dirac effect in the nonlinear regime. Two different mechanisms of enhanced energy transfer were observed: electron trapping and phase-area displacement. Experimental results and computer simulations of both mechanisms are presented.
- Research Organization:
- Department of Electron Devices, Faculty of Engineering, Tel-Aviv University, Tel-Aviv, Israel
- OSTI ID:
- 7011867
- Journal Information:
- Phys. Rev. A; (United States), Vol. 38:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LASER RADIATION
PHOTON-ELECTRON INTERACTIONS
ENERGY TRANSFER
BEAM-BEAM INTERACTIONS
BEAT WAVE ACCELERATORS
CARBON DIOXIDE LASERS
COMPTON EFFECT
ELECTRONS
FREE ELECTRON LASERS
NONLINEAR PROBLEMS
SYNCHRONIZATION
TRAPS
ACCELERATORS
BASIC INTERACTIONS
BEAM DYNAMICS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
GAS LASERS
INTERACTIONS
LASERS
LEPTONS
PARTICLE INTERACTIONS
PHOTON-LEPTON INTERACTIONS
RADIATIONS
SCATTERING
420300* - Engineering- Lasers- (-1989)