| Paper | Title | Page |
|---|
| TUP38 | A Novel Sputtered Medium Beta Cavity for ALPI | 216 |
| | - S. Stark, A. M. Porcellato, A. Palmieri, V. Palmieri, P. Favaron, E. Bissiato, F. Stivanello, F. Chiurlotto, G. Dona, D. Giora, M. DeLazzari
INFN-LNL
| |
| | The installed medium beta ALPI cavities were produced
by Nb sputtering on old Cu substrates, which were
originally Pb plated. The cavity renew could practically
double the previous average operational accelerating field
but the performance obtained in high beta resonators, whose
Cu bases were designed to be sputtered, could not be
reached [1, 2]. To overcome this performance gap, we
designed, built and tested a novel medium beta cavity, which
has the shorting plate rounded as in high beta cavities, while
the beam ports are obtained by plastic deformation of the
outer conductor instead of being brazed to the cavity body
as in the previous medium beta QWRs. The paper describes
cavity design, substrate construction technology, surface
treatments and results of the first resonator cold test. | |