Effect of source voltage subharmonics on a rapid cycling synchrotron power supply

Author

Zhang, F.Q. ; Adachi, T. ; Endo, K.

Author_Institution

Graduate Univ. for Adv. Studies, Tsukuba, Japan

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3470

Abstract

In a 50 Hz rapid cycling power supply, the resonant AC current of the synchrotron magnet is modulated by the subharmonics of the source voltage rectified in 12 pulses with SCR. The modulation is found to be caused by the fluctuation of the pulsed power that is transferred to the magnet circuit via a choke transformer due to the cycle-to-cycle unequal charging of the capacitor located just after the rectifier. This phenomena is observed when there is a mismatch between frequencies of the power line and resonant magnet circuit. In this paper, the modulation behavior is analyzed and the experimental results are given as well as those of the circuit computations

Keywords

accelerator magnets; power supplies to apparatus; power supply circuits; power system harmonics; synchrotrons; 50 Hz; capacitor; choke transformer; cycle-to-cycle charging; power line; power supply; rapid cycling synchrotron; resonant AC current; resonant magnet circuit; source voltage subharmonics; Fluctuations; Magnetic circuits; Magnetic modulators; Magnetic resonance; Pulse modulation; Pulse transformers; Pulsed power supplies; Synchrotrons; Thyristors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753245

Filename

753245