Porcellato A.M.

Paper	Title	Page
MO404	ALPI QWR and S-RFQ Operating Experience	55
	G. Bisoffi, G. Bassato, S. Canella, D. Carlucci, A. Facco, P. Modanese, A. Pisent, A. M. Porcellato, P. A. Posocco INFN
	The operation of ALPI at INFN-LNL allowed acquiring more than a decade of experience on the operational issues of quarter wave resonators (QWRs), built with the three technologies of Pb/Cu electroplating , Nb/Cu sputtering and full Nb. More recently, with the commissioning of the superconducting injector PIAVE, a 2-year long operational experience with superconducting RFQs was acquired. The paper reports off and on line performances of all INFN-LNL superconducting resonators and the most relevant issues in their setup for reliable accelerator operation. Future perspectives, opened by the experimental campaign with the EU detector AGATA and by the proposed use of ALPI as the radioactive nuclei beam (RNB) accelerator of the SPES facility, are discussed.
	Slides(PDF)
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.
TUP58	First Cold Tests of the Beta=0.12 Ladder Resonator at LNL	264
	G. Bisoffi, E. Bissiato, F. Chiurlotto, A. Palmieri, A. M. Porcellato, F. Scarpa, S. Stark INFN-LNL
	The Ladder resonator is a 4-gap full Nb cavity suitable for the 0.1< beta <0.2 range of high current proton linacs. A beta=0.12 Nb prototype of this cavity has been built by E. Zanon SpA (Schio, Italy) on the basis of LNL design. In this paper the construction procedure of such cavity, as well as the tuning steps necessary to match field and frequency requirements are recalled. Finally, the main outcomes of the first cryogenic test performed at LNL in July 2007 are described.