Stochastic resonance in free-electron lasers.
We present evidence of stochastic resonance in free-electron lasers. In order to do that, we have analyzed theoretically the dynamics of a free-electron laser oscillator. A weak modulation and a noise source have been applied to the initial energy of the electron beam. We have found stochastic resonance for different frequencies and amplitudes of the modulation. A threshold crossing mechanism leads to the stochastic resonance in this system.
Calderón
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Stanford Picosecond FEL Center, Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305-4085, USA.