Title :
Stabilization of the spectral intensity fluctuations with the higher order mode frequency tuners
Author :
Wang, Ch. ; Chang, L.H. ; Chang, S.S. ; Chang, Y.I. ; Kuo, C.C. ; Lai, C.Y. ; Lau, W.K. ; Lin, M.C. ; Lin, S.J. ; Luo, G.H. ; Yang, T.T.
Author_Institution :
Synchrotron Radiat. Res. Center, Hsinchu, Taiwan
Abstract :
A strong excitation of the longitudinal coupled-bunch instabilities, which is suspected to be driven by the TM011-like mode of the DORIS-I cavities, was observed at the higher electron beam current in the storage ring of SRRC. Such instability leads to heavy fluctuations of the photon beam intensity in the horizontal plane and therefore restricted the maximal useful beam current for the user experiments. This restriction has been released by replacing the damping antennae with the additional tuners. Here, we report our experiences after one-year routine operations of the main RF cavities with the second tuners at SRRC
Keywords :
X-ray production; accelerator RF systems; accelerator cavities; electron accelerators; electron beams; fluctuations; particle beam stability; storage rings; 1 y; DORIS-I cavities; RF cavities; SRRC; TM011-like mode; electron beam current; higher order mode frequency tuners; longitudinal coupled-bunch instabilities; photon beam intensity; spectral intensity fluctuations stabilization; storage ring; Cooling; Damping; Fluctuations; Q factor; Radio frequency; Resonance; Storage rings; Synchrotron radiation; Temperature; Tuners;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.750785
