Title :
Digital control for KEK-PS MA loaded RF system
Author :
Yoshii, M. ; Ezura, E. ; Hashimoto, Y. ; Ohmori, C. ; Mori, Y. ; Takagi, A. ; Yamamoto, M. ; Schnase, A.
Author_Institution :
KEK, Tsukuba, Japan
Abstract :
The magnetic alloy loaded radio-frequency system has been installed in the KEK 12 GeV synchrotron. This system is a high field gradient radio-frequency system and is designed to operate not only as a fundamental harmonic system to increase the insufficient matching voltage, supplied by 4 conventional ferrite cavities but also as a second radiofrequency system to alleviate the space charge effects during beam injection. Digital signal processing is the technique to process the continuous machine or beam signals and to couple with a direct digital synthesis, which is the way to generate a phase controlled precise frequency signal. Both techniques are indispensable for the low-level radio-frequency controls of a complex system. Developments of DDS based radio-frequency signal generator and digital phase detector and related ADC modules have been started for this new MA radio-frequency system. The details of R&D equipments are going to be reported
Keywords :
accelerator RF systems; accelerator control systems; digital control; direct digital control; proton accelerators; synchrotrons; 12 GeV; KEK synchrotron; KEK-PS; beam injection; digital phase detector; digital signal processing; direct digital synthesis; ferrite cavities; fundamental harmonic system; high field gradient radiofrequency system; low-level radiofrequency controls; magnetic alloy loaded radiofrequency system; phase controlled precise frequency signal; space charge effects; Digital control; Digital signal processing; Ferrites; Optical coupling; Radio frequency; Signal generators; Signal processing; Space charge; Synchrotrons; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986515
