• M. Zambelli, M. Kokole, T. Milharcic
  KYMA, Trieste
• B. Diviacco, D. Zangrando
  ELETTRA, Basovizza
• G. Soregaroli, M. Tedeschi
  Euromisure srl, Pieve S. Giacomo (CREMONA)

The today’s forefront of light source facilities is represented by the so-called 4th generation light sources, i.e. linear accelerators of electrons named “Free-Electron Lasers” or “FEL”. In FELs, electrons are not accumulated in a storage ring, but they are generated and accelerated with a “single-pass” process. In these conditions the only possibility of generating light is through the use of long chains of undulators. The characteristics and performances of the magnetic material used in undulators is pushed to the limit of the available technology. In spite of the high accuracy of manufacturing these magnet blocks must be further characterised one by one and appropriately coupled in order to achieve optimal uniformity of magnetic characteristics of the finished undulator. This presentation illustrates the work carried out at Elettra light source facility of Sincrotrone Trieste SCpA (ST) and at Kyma (spin-off company of ST) in order to characterize pure permanent magnet blocks used in manufacturing of undulators for the next 4th generation facility being built at the Basovizza site of ST, i.e. the new Free-Electron Laser called “FERMI@Elettra”.