Two color free-electron laser and frequency beating.
We review the theory of two color high gain free-electron laser emission, derive the integral equation characterizing the evolution of the optical intensities, and provide a description of the relevant dynamics. The characteristic feature of this regime is the existence of a mutual bunching, whose origin and role are discussed.
ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy.
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Ciocci
ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy.
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Dattoli
ENEA Centro Ricerche Bologna, via Martiri di Monte Sole, 4, IT 40129 Bologna, Italy.
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Pagnutti
ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy.
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Petralia
ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy.
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Sabia
INFN Sezione di Bologna, Viale B. Pichat, 6/2, IT 40127 Bologna, Italy.
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Ottaviani
INFN Laboratori Nazionali di Frascati, Via E. Fermi IT 00044 Frascati, Rome, Italy.
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Ferrario
INFN Laboratori Nazionali di Frascati, Via E. Fermi IT 00044 Frascati, Rome, Italy.
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Villa
Università degli Studi di Milano, via Celoria 16, IT 20133 Milano, Italy and INFN-Mi, via Celoria 16, IT 20133 Milano, Italy.
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Petrillo