
 D. Alesini, M. Bellaveglia, S. Bini, R. Boni, P. Chimenti, F. Cioeta, R.D. Di Raddo, A. Falone, A. Gallo, V.L. Lollo, L. Palumbo, S. Pioli, A. Variola
INFN/LNF, Frascati (Roma), Italy
 F. Cardelli, M. Magi, A. Mostacci, L. Palumbo, L. Piersanti
University of Rome La Sapienza, Rome, Italy
 F. Cardelli, L. Piersanti
INFNRoma1, Rome, Italy
 P. Favaron, F. Poletto
INFN/LNL, Legnaro (PD), Italy
 L. Ficcadenti, F. Pellegrino, V. Pettinacci
INFNRoma, Roma, Italy



The ELINP CBand structures are 1.8 m long travelling wave accelerating structures, quasiconstant gradient, with a field phase advance per cell of 2pi/3. They operate at a repetition rate of 100 Hz and, because of the multibunch operation, they have been designed with a dipole HOM damping system to avoid beam breakup (BBU). The structures have symmetric input and output couplers and integrate, in each cell, a waveguide HOM damping systems with silicon carbide RF absorbers. An optimization of the electromagnetic and mechanical design has been done to simplify the fabrication and to reduce their cost. After the first full scale prototype successfully tested at the nominal gradient of 33 MV/m, the production of the twelve structures started. In the paper we illustrate the main design criteria, the realization process and the high power test results.

