Title :
Development of 5-cell RF cavity for SPring-8 booster synchrotron
Author :
Suzuki, H. ; Harami, T. ; Miyahara, Y. ; Rizawa, T. ; Satoh, S. ; Tanabe, Y. ; Yoshiyuki, K. ; Nagafuchi, T. ; Kawazu, S. ; Nakano, M.
Author_Institution :
JAERI, Ibaraki, Japan
Abstract :
Slot-coupled 5-cell RF cavities were adopted for the SPring-8 (Super Photon Ring 8-GeV) booster synchrotron. They operated at 505.58 MHz with 250 kW CW and were designed to have a 1.7% coupling coefficient and more than 21 M Omega /m of shunt impedance. A mock-up cavity, made of class-1 oxygen-free Cu, has been fabricated for high-power tests with a 1-MW klystron. The authors present the structural features, the thermal analysis, and the RF characteristics, including higher-order modes and the beam instability. The RF characteristics of the cavity for the SPring-8 booster synchrotron were measured. Flat- pi mode was realized by adjusting the fixed tuner. The shunt impedance meets the requirement of the booster synchrotron.<>
Keywords :
electron accelerators; klystrons; storage rings; synchrotrons; 1 MW; 1-MW klystron; 250 kW; 5-cell RF cavity; 505.58 MHz; Cu; RF characteristics; SPring-8 booster synchrotron; Super Photon Ring 8-GeV; beam instability; coupling coefficient; fixed tuner; high-power tests; higher-order modes; mock-up cavity; oxygen-free; shunt impedance; slot-coupled; structural features; thermal analysis; Acceleration; Ceramics; Cooling; Frequency estimation; Radio frequency; Silver; Synchrotrons; Temperature; Tuners; Tuning;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164414
