IPAC2011 - List of Authors (Millo, D.)

Paper	Title	Page
THPC164	Phase Shifters for the FERMI@Elettra Undulators	3278
	B. Diviacco, R. Bracco, D. Millo, M.M. Musardo ELETTRA, Basovizza, Italy
	The variable gap undulator system in operation at the FERMI@Elettra Free Electron Laser facility requires adjustable phase matching devices between consecutive radiator segments in order to maintain optimal lasing conditions while changing the radiation properties. A permanent magnet phase shifter has been designed to achieve the required electron beam delay in a compact structure that could be installed in close proximity to the undulators. In this paper we present the design of the phasing units and the results of the magnetic measurements performed on the five devices installed so far. We also describe the method used to properly set their field strength for any given electron energy, radiation wavelength and polarization.

Paper

Title

Page

Phase Shifters for the FERMI@Elettra Undulators

3278

B. Diviacco, R. Bracco, D. Millo, M.M. Musardo
ELETTRA, Basovizza, Italy

The variable gap undulator system in operation at the FERMI@Elettra Free Electron Laser facility requires adjustable phase matching devices between consecutive radiator segments in order to maintain optimal lasing conditions while changing the radiation properties. A permanent magnet phase shifter has been designed to achieve the required electron beam delay in a compact structure that could be installed in close proximity to the undulators. In this paper we present the design of the phasing units and the results of the magnetic measurements performed on the five devices installed so far. We also describe the method used to properly set their field strength for any given electron energy, radiation wavelength and polarization.