The optimization of the beam brightness is one of the main goals of the research and development efforts in rf photo-injectors devoted to short wavelength FELs. The ve- locity bunching experiment at SPARC has recently demon- strated the possibility of increasing the beam current via rf compression at low energies, while compensating the space charge induced emittance degradation by means of contin- uous magnetic focusing, increasing the final beam bright- ness. Stable compression ratios up to a factor 12 and 17 have been observed respectively for the high charge and low charge cases. In this paper measurements of longitu- dinal beam characteristics, projected and slice transverse emittances in the velocity bunching regime are presented, for different Gun-solenoid field values. Comparisons with simulations are also reported.
VELOCITY BUNCHING EXPERIMENT AT SPARC / Filippetto, D.; Alesini, D.; Bellaveglia, M.; Boni, R.; Boscolo, M.; Castellano, M.; Chiadroni, E.; Cultrera, L.; Di Pirro, G.; Ferrario, M.; Ficcadenti, L.; Fusco, V.; Gallo, A.; Gatti, G.; Marrelli, C.; Migliorati, Mauro; Mostacci, Andrea; Pace, E.; Palumbo, Luigi; Spataro, B.; Vaccarezza, C.; Vicario, C.; Giannessi, L.; Labat, M.; Quattromini, M.; Ronsivalle, C.; Bacci, A.; Rossi, A. R.; Serafini, L.; Serluca, M.; Cianchi, A.; Marchetti, B.; Rosenzweig, J.. - STAMPA. - (2009). (Intervento presentato al convegno Free electron laser Conference FEL09 tenutosi a Liverpool, UK nel August 2009).
VELOCITY BUNCHING EXPERIMENT AT SPARC
E. Chiadroni;L. Ficcadenti;MIGLIORATI, Mauro;MOSTACCI, Andrea;PALUMBO, Luigi;
2009
Abstract
The optimization of the beam brightness is one of the main goals of the research and development efforts in rf photo-injectors devoted to short wavelength FELs. The ve- locity bunching experiment at SPARC has recently demon- strated the possibility of increasing the beam current via rf compression at low energies, while compensating the space charge induced emittance degradation by means of contin- uous magnetic focusing, increasing the final beam bright- ness. Stable compression ratios up to a factor 12 and 17 have been observed respectively for the high charge and low charge cases. In this paper measurements of longitu- dinal beam characteristics, projected and slice transverse emittances in the velocity bunching regime are presented, for different Gun-solenoid field values. Comparisons with simulations are also reported.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
