Higher-order modes in the bell-shaped single-cell cavity of the SPring-8 storage ring

1996 ◽  
Vol 383 (2-3) ◽  
pp. 325-336 ◽  
Author(s):  
H. Ego ◽  
M. Hara ◽  
Y. Kawashima ◽  
Y. Ohashi ◽  
T. Ohshima ◽  
...  
Keyword(s):  
Single Cell ◽  
Storage Ring ◽  
Higher Order ◽  
Higher Order Modes ◽  
Cell Cavity

Installation of new damped cavities at the Photon Factory storage ring

1998 ◽  
Vol 5 (3) ◽  
pp. 369-371 ◽  
Author(s):  
Masaaki Izawa ◽  
Tadashi Koseki ◽  
Shyogo Sakanaka ◽  
Takeshi Takahashi ◽  
Klaus Hass ◽  
...  
Keyword(s):  
Single Cell ◽  
Storage Ring ◽  
High Power ◽  
Simple Structure ◽  
Power Input ◽  
Higher Order ◽  
Microwave Absorber ◽  
Photon Factory ◽  
Higher Order Modes ◽  
Cell Cavity

New damped cavities have been installed in the Photon Factory (PF) storage ring and successfully operated in the last scheduled user run of 1996. The new damped cavity is a simple single-cell cavity with somewhat large beam-duct holes. The part of the beam duct that is attached to the cavity is made of SiC, which works as a microwave absorber and damps the higher-order modes excited in the cavity. Because of its simple structure, the operation of the cavity is very stable and also a high power input of more than 150 kW is possible. No coupled-bunch instabilities due to the new cavity were observed during operation.

HOM (higher-order mode) damper tests of the storage ring single-cell cavity with a 20-MeV e− beam for advanced photon source

1994 ◽  
Author(s):  
J. J. Song ◽  
S. O. Brauer ◽  
R. T. Daly ◽  
Y. W. Kang ◽  
R. L. Kustom ◽  
...  
Keyword(s):  
Single Cell ◽  
Storage Ring ◽  
Higher Order ◽  
Order Mode ◽  
Photon Source ◽  
Higher Order Mode ◽  
Cell Cavity

RF system of the SPring-8 storage ring

1998 ◽  
Vol 5 (3) ◽  
pp. 379-381
Author(s):  
Hiroyasu Ego ◽  
Masahiro Hara ◽  
Yoshitaka Kawashima ◽  
Yuji Ohashi ◽  
Takashi Ohshima ◽  
...  
Keyword(s):  
Storage Ring ◽  
Cooling Water ◽  
Higher Order ◽  
Synchrotron Radiation Beam ◽  
Order Mode ◽  
Coupling Impedance ◽  
Radiation Beam ◽  
Rf System ◽  
Higher Order Modes ◽  
Cavity Cooling

Construction of three RF stations in the storage ring of SPring-8 has been completed. The design concept concentrates on avoiding a coupled-bunch instability which limits the stored current or makes the synchrotron radiation beam unstable. The cavity is bell-shaped to reduce the coupling impedance of the higher-order modes. The cavity dimensions are trimmed systematically to distribute the higher-order mode frequencies. Each cavity has two movable tuners. The temperature of the cavity cooling water is controlled within 0.02 K and the water flow is kept constant. The construction and commissioning of the SPring-8 storage ring RF system is reported.

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