FEL2014 - List of Authors (Mirian, N.S.)

Paper

Title

Page

Two-color Free-electron Laser via Two Orthogonal Undulators

358

N.S. Mirian
IPM, Tehran, Iran
G. Dattoli
ENEA C.R. Frascati, Frascati (Roma), Italy
V. Petrillo
Universita' degli Studi di Milano, Milano, Italy

An amplifier Free electron Laser (FEL) including two orthogonal polarized undulators with different periods and field intensities is able to emit two color radiations with different frequency and polarization while the total length of device does not change respect to usual single color FELs. The wavelengths of two different colors can be changed by choosing different periods, while variation in the magnetic strengths can be used to modify the gain lengths.

MOP080

Two Color Experiments at SPARC: External and Intra-bunch Seeding

D. Alesini, M.P. Anania, M. Bellaveglia, M. Castellano, E. Chiadroni, D. Di Giovenale, G. Di Pirro, M. Ferrario, A. Gallo, G. Gatti, R. Pompili, S. Romeo, V. Shpakov, C. Vaccarezza, F. Villa
INFN/LNF, Frascati (Roma), Italy
M. Artioli
ENEA-Bologna, Bologna, Italy
A. Bacci, A.R. Rossi
Istituto Nazionale di Fisica Nucleare, Milano, Italy
M.C. Carpanese, F. Ciocci, G. Dattoli, E. Di Palma, L. Giannessi, A. Petralia, E. Sabia, I.P. Spassovsky
ENEA C.R. Frascati, Frascati (Roma), Italy
A. Cianchi
INFN-Roma II, Roma, Italy
F. Filippi, A. Giribono
INFN-Roma, Roma, Italy
L. Innocenti
Università di Roma II Tor Vergata, Roma, Italy
N.S. Mirian, V. Petrillo
Universita' degli Studi di Milano & INFN, Milano, Italy
A. Mostacci
Rome University La Sapienza, Roma, Italy
J.V. Rau
ISM-CNR, Rome, Italy

The FEL-SPARC operation with two bunches at different energies has been characterized using different tools. The effect of the e-beam matching on the SASE operation has been explored by controlling the transport with an ad hoc developed control system, allowing either the transport in matching conditions and in different configurations. Since the two bunches have, at the entrance of the undulator, different phase space characteristics we used this effect as a knob to enhance or suppress one or the other FEL mode. We investigated the effect of seeding on both frequencies and observed beating waves, furthermore we observed effects of intra-bunch seeding when only one of the modes is seeded.

Paper	Title	Page
TUP006	Two-color Free-electron Laser via Two Orthogonal Undulators	358
	N.S. Mirian IPM, Tehran, Iran G. Dattoli ENEA C.R. Frascati, Frascati (Roma), Italy V. Petrillo Universita' degli Studi di Milano, Milano, Italy
	An amplifier Free electron Laser (FEL) including two orthogonal polarized undulators with different periods and field intensities is able to emit two color radiations with different frequency and polarization while the total length of device does not change respect to usual single color FELs. The wavelengths of two different colors can be changed by choosing different periods, while variation in the magnetic strengths can be used to modify the gain lengths.

MOP080	Two Color Experiments at SPARC: External and Intra-bunch Seeding
	D. Alesini, M.P. Anania, M. Bellaveglia, M. Castellano, E. Chiadroni, D. Di Giovenale, G. Di Pirro, M. Ferrario, A. Gallo, G. Gatti, R. Pompili, S. Romeo, V. Shpakov, C. Vaccarezza, F. Villa INFN/LNF, Frascati (Roma), Italy M. Artioli ENEA-Bologna, Bologna, Italy A. Bacci, A.R. Rossi Istituto Nazionale di Fisica Nucleare, Milano, Italy M.C. Carpanese, F. Ciocci, G. Dattoli, E. Di Palma, L. Giannessi, A. Petralia, E. Sabia, I.P. Spassovsky ENEA C.R. Frascati, Frascati (Roma), Italy A. Cianchi INFN-Roma II, Roma, Italy F. Filippi, A. Giribono INFN-Roma, Roma, Italy L. Innocenti Università di Roma II Tor Vergata, Roma, Italy N.S. Mirian, V. Petrillo Universita' degli Studi di Milano & INFN, Milano, Italy A. Mostacci Rome University La Sapienza, Roma, Italy J.V. Rau ISM-CNR, Rome, Italy
	The FEL-SPARC operation with two bunches at different energies has been characterized using different tools. The effect of the e-beam matching on the SASE operation has been explored by controlling the transport with an ad hoc developed control system, allowing either the transport in matching conditions and in different configurations. Since the two bunches have, at the entrance of the undulator, different phase space characteristics we used this effect as a knob to enhance or suppress one or the other FEL mode. We investigated the effect of seeding on both frequencies and observed beating waves, furthermore we observed effects of intra-bunch seeding when only one of the modes is seeded.