Title :
A 476 MHz RF system for the storage mode of the AmPS ring
Author :
Kroes, F. ; De Groen, P. ; Heine, E. ; Heutenik, B. ; Kruijer, A. ; Munneke, B. ; Pirovano, R. ; Sluijk, T. ; Verkooyen, J.
Author_Institution :
NIKHEF-K, Amsterdam, Netherlands
Abstract :
The Amsterdam Pulse Stretcher (AmPS) is an electron storage and pulse stretcher ring. The ring operates at energies between 300 and 900 MeV at circulating currents up to 200 mA. A 50 kW RF source with fast amplitude- and phase modulation drives a 2856 MHz accelerator section in the stretcher mode of operation. This RF source doesn´t provide enough power to ensure acceptable beam lifetime for storage mode operation at energies above 550 MeV. Therefore a 476 MHz CW RF system has been implemented. Its cavity is a modified, former DORIS (DESY), 500 MHz single cell pillbox cavity. In the cavity a gap voltage of over 400 kV is generated at the maximum 30 kW CW power from a YK1233 Philips klystron. Three RF feedback control circuits are incorporated to stabilize the cavity parameters; one for frequency, the second for the phase and the third for the amplitude. Design, realization and operation of this RF system is described
Keywords :
accelerator RF systems; accelerator cavities; accelerator control systems; circuit feedback; electron accelerators; klystrons; storage rings; 200 mA; 2856 MHz; 30 kW; 300 to 900 MeV; 400 kV; 476 MHz; 50 kW; AmPS ring; Amsterdam Pulse Stretcher; RF feedback control circuits; RF system; YK1233 Philips klystron; accelerator section; amplitude modulation; beam lifetime; electron storage ring; phase modulation; single cell pillbox cavity; storage mode; Coaxial components; Cooling; Copper; Degradation; Nose; Radio frequency; Surface impedance; Switches; Temperature; Testing;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505281
