Title :
Operational characteristics of RF system affecting PLS beam stability
Author :
Kwon, M. ; Park, H.-J. ; Yu, I.H. ; Huang, J.-Y. ; Ko, I.S.
Author_Institution :
Pohang Accel. Lab., South Korea
Abstract :
The fourth RF station was installed to the Pohang Light Source (PLS), whereas its station consists of a 60 kW klystron amplifier and a nose cone type cavity connected by a coaxial transmission line. Total 240 kW RF power is available for storing electrons up to 400-mA at 2-GeV and 200-mA at 2.5-GeV of beam energy. During the normal operation, some dangerous higher order modes (HOMs) induced by cavities have been identified. Making an effort to suppress instabilities caused by HOMs has been started by enhancing the capability of cavity cooling temperature control and adding the transverse and longitudinal feedback systems. Besides these efforts, characterizations of the beam loss transient due to RF have been underway. A modulation experiment of the accelerating voltage is also planned using the fourth cavity. We present performance test results with newly installed low level system
Keywords :
accelerator RF systems; accelerator cavities; electron accelerators; klystrons; particle beam stability; storage rings; 2 GeV; 2.5 GeV; 240 kW; 60 kW; HOM; PLS; Pohang Light Source; RF power; RF system; accelerating voltage; beam loss transient; beam stability; cavity cooling temperature control; higher order modes; klystron amplifier; longitudinal feedback; nose cone type cavity; transverse feedback; Coaxial components; Cooling; Electron beams; Klystrons; Light sources; Nose; Power transmission lines; Radio frequency; Radiofrequency amplifiers; Radiofrequency identification;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753093
