Waveguide effects in superradiant free-electron lasers

I Free Electron Lasers*

Free-electron lasers

CURRENT SCIENCE, VOL. 87, NO. 8, 25 OCTOBER 2004 1066 Srinivas Krishnagopal and Vinit Kumar are in the Centre for Advanced Technology, Indore 452 013, India; Srinivas Krishnagopal and S. K. Sarkar are in the Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India; Sudipta Maiti and S. S. Prabhu are in the Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, In...

Lasers , Free - Electron

Free-electron lasers are radiation sources, based on the coherent emission of synchrotron radiation of relativistic electrons within an undulator or wiggler. The resonant radiation wavelength depends on the electron beam energy and can be tuned over the entire spectrum from micrometer to X-ray radiation. The emission level of free-electron lasers is several orders of magnitude larger than the e...

Superradiant and stimulated superradiant emission in a prebunched beam free-electron maser.

An electron beam, prebunched at the synchronous free-electron laser frequency and passing through a magnetic undulator, emits coherent (superradiant) synchrotron undulator radiation at the bunching frequency. If an external electromagnetic wave is introduced into the interaction region, at the same frequency and at a proper phase, the radiation process will be stimulated (stimulated prebunched ...

Superradiant cascade in a seeded free-electron laser.

We report measurements demonstrating the concept of the free-electron laser (FEL) superradiant cascade. Radiation (λ(rad) = 200 nm) at the second harmonic of a short, intense seed laser pulse (λ(seed) = 400 nm) was generated by the cascaded FEL scheme at the transition between the modulator and radiator undulator sections. The superradiance of the ultrashort pulse is confirmed by detailed measu...