Schemes of superradiant emission from electron beams and "spin-flip emission of radiation"

A. Gover*

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


A unified analysis for Superradiant emission from bunched electron beams in various kinds of radiation scheme is presented. Radiation schemes that can be described by the formulation include Pre-bunched FEL (PB-FEL), Coherent Synchrotron Radiation (CSR), Smith-Purcell Radiation, Cerenkov-Radiation, Transition Radiation and more. The theory is based on mode excitation formulation - either discrete or continuous (the latter - in open structures). The discrete mode formulation permits simple evaluation of the spatially coherent power and spectral power of the source. These figures of merit of the radiation source are useful for characterizing and comparing the performance of different radiation schemes. When the bunched electron beam emits superradiantly, these parameters scale like the square of the number of electrons, orders of magnitude more than spontaneous emission. The formulation applies to emission from single electron bunches, periodically bunched beams, or emission from a finite number of bunches in a macro-pulse. We have recently employed the formulation to calculate a new kind of coherent radiation from electron beam: enhanced Electron Spin Resonance Emission from a polarized electron beam. Estimates of the characteristics and possible applications of this effect are presented.

Original languageEnglish
Number of pages3
StatePublished - 2005
Event27th International Free Electron Laser Conference, FEL 2005 - Palo Alto, CA, United States
Duration: 21 Aug 200526 Aug 2005


Conference27th International Free Electron Laser Conference, FEL 2005
Country/TerritoryUnited States
CityPalo Alto, CA


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