| Paper |
Title |
Page |
| TUPC06 |
Coherent Radiation Studies For The FERMI@Elettra Relative Bunch Length Diagnostics
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156 |
| |
- M. Veronese, S. Di Mitri, M. Ferianis
ELETTRA, Basovizza, Trieste
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Bunch compressors are key components of the seeded FEL FERMI@elettra. Assuring their stable operation requires multiple non-destructive diagnostics to provide error signals to the feedback systems. Both the energy and the peak current of the electron bunch have to be stabilized by the feedback systems. The peak current stabilization implies charge and bunch length stabilization. The latter will be achieved by a redundant diagnostics based on Coherent Synchrotron Radiation (CSR) and Coherent Diffraction Radiation (CDR). In this paper we describe a study of Coherent Radiation emission downstream bunch compressors as the source of a relative bunch length measurement diagnostics. The study evaluates the most critical parameters in the design of such a diagnostic using numerical integration to calculate the spectral angular properties of the radiation for both CSR and CDR.
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| TUPC10 |
A transverse RF deflecting cavity for the FERMI@elettra project
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168 |
| |
- P. Craievich, S. Di Mitri, M. Ferianis, M. Veronese
ELETTRA, Basovizza, Trieste
- D. Alesini
INFN/LNF, Frascati (Roma)
- M. Petronio
DEEI, Trieste
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The layout of FERMI@elettra includes a high energy transfer line (TL) which brings the accelerated electron bunch to the FEL undulator chains. The TL optics has been designed according to several space constraints and with the purpose of including diagnostics for the complete characterization of the electron bunch just before the FEL process starts. Basing on such optics, this paper reports the study of the electron bunch deflection at nominal energy of 1.2 GeV for the measurement of the bunch length, of the transverse slice emittance and of the slice energy spread, coupled to a downstream dipole. The effect of the cavity on the electron beam was simulated by tracking code and the specification on the deflecting voltage was thus confirmed. Furthermore the RF design and electromagnetic simulations are also presented here.
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