We report measurements demonstrating the concept of the free-electron laser (FEL) superradiant cascade. Radiation (lambda(rad) = 200 nm) at the second harmonic of a short, intense seed laser pulse (lambda(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 measurements of the resulting spectral structure, the intensity level of the produced harmonics, and the trend of the energy growth along the undulator. These results are compared to numerical particle simulations using the FEL code GENESIS 1.3 and show a satisfactory agreement. DOI: 10.1103/PhysRevLett.110.044801

Superradiant Cascade in a Seeded Free-Electron Laser / L., Giannessi; M., Bellaveglia; E., Chiadroni; A., Cianchi; M. E., Couprie; M. D., Franco; G. D., Pirro; M., Ferrario; G., Gatti; M., Labat; G., Marcus; Mostacci, Andrea; A., Petralia; V., Petrillo; M., Quattromini; J. V., Rau; S., Spampinati; V., Surrenti. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 110:4(2013), p. 044801. [10.1103/physrevlett.110.044801]

Superradiant Cascade in a Seeded Free-Electron Laser

E. Chiadroni;MOSTACCI, Andrea;
2013

Abstract

We report measurements demonstrating the concept of the free-electron laser (FEL) superradiant cascade. Radiation (lambda(rad) = 200 nm) at the second harmonic of a short, intense seed laser pulse (lambda(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 measurements of the resulting spectral structure, the intensity level of the produced harmonics, and the trend of the energy growth along the undulator. These results are compared to numerical particle simulations using the FEL code GENESIS 1.3 and show a satisfactory agreement. DOI: 10.1103/PhysRevLett.110.044801
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Superradiant Cascade in a Seeded Free-Electron Laser / L., Giannessi; M., Bellaveglia; E., Chiadroni; A., Cianchi; M. E., Couprie; M. D., Franco; G. D., Pirro; M., Ferrario; G., Gatti; M., Labat; G., Marcus; Mostacci, Andrea; A., Petralia; V., Petrillo; M., Quattromini; J. V., Rau; S., Spampinati; V., Surrenti. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 110:4(2013), p. 044801. [10.1103/physrevlett.110.044801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/559969
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