Alesini, D.
Bellaveglia, M.
Bini, S.
Boni, R.
Cardelli, F.
Chimenti, P.
Cioeta, F.
Di Raddo, R.D.
Falone, A.
Favaron, P.
Ficcadenti, L.
Gallo, A.
Lollo, V.L.
Magi, M.
Mostacci, A.
Palumbo, L.
Pellegrino, F.
Pettinacci, V.
Piersanti, L.
Pioli, S.
Poletto, F.
Variola, A.
Realization and High Power Tests of Damped C-Band Accelerating Structures for the ELI-NP Linac
JACoW
Geneva, Switzerland
978-3-95450-147-2
10.18429/JACoW-IPAC2016-MOPMW004
English
399-402
MOPMW004
vacuum
ion
HOM
klystron
damping
Contribution to a conference proceedings
2016
2016-06
http://dx.doi.org/10.18429/JACoW-IPAC2016-MOPMW004
http://jacow.org/ipac2016/papers/mopmw004.pdf
The ELI-NP C-Band structures are 1.8 m long travelling wave accelerating structures, quasi-constant gradient, with a field phase advance per cell of 2pi/3. They operate at a repetition rate of 100 Hz and, because of the multi-bunch operation, they have been designed with a dipole HOM damping system to avoid beam break-up (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.