Title :
The DAΦNE 3rd harmonic cavity
Author :
Alesini, D. ; Boni, R. ; Clozza, A. ; Gallo, A. ; Guiducci, S. ; Marcellini, F. ; Migliorati, M. ; Palumbo, L. ; Pellegrino, L. ; Sgamma, F. ; Zobov, M.
Author_Institution :
Lab. Nazionali di Frascati, Ist. Nazionale di Fisica Nucl., Frascati, Italy
Abstract :
The installation of a passive 3rd harmonic cavity in both the e+ and e- rings of the Frascati Φ-factory DAΦNE has been decided in order to improve the Touschek lifetime by increasing the bunch length. The implications of the RF harmonic system on the beam dynamics, in particular those related to the gap in the bunch filling pattern, have been carefully studied by means of analytical and numerical tools. A single-cell cavity incorporating a ferrite ring for the HOM damping has been designed through the extensive use of MAFIA and HFSS simulation codes. One cavity prototype has been built and extensively bench tested, while the fabrication of the two final cavities is almost completed. A description of the design and construction activities, and a set of experimental measurements are reported in this paper
Keywords :
accelerator cavities; colliding beam accelerators; electron accelerators; particle beam bunching; particle beam dynamics; storage rings; DA Phi NE; Frascati Phi-factory; HFSS simulation codes; HOM damping; MAFIA simulation codes; RF harmonic system; Touschek lifetime; beam dynamics; bunch filling pattern; bunch length; passive third harmonic cavity; single-cell cavity; Damping; Fabrication; Ferrites; Filling; Harmonic analysis; Pattern analysis; Prototypes; Radio frequency; Structural beams; Testing;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986512
