Title :
Development of the PEFP low level RF control system
Author :
Kim, H.S. ; Kwon, H.J. ; Seol, K.T. ; Hong, I.S. ; Song, Y.G. ; Kim, D.I. ; Cho, Y.S.
Author_Institution :
Korea Atomic Energy Res. Inst., Daejeon
Abstract :
The RF amplitude and the phase stability requirements of the LLRF system for the PEFP (Proton Engineering Frontier Project) proton linac are within 1% and 1 degree, respectively. As a prototype of the LLRF, a simple digital PI control system based on commercial FPGA board is designed and tested. The main features are a sampling rate of 40 MHz which is four times higher than the down- converted cavity signal frequency, digital in-phase and quadrature detection, pulsed mode operation with the external trigger, and a simple proportional-integral feedback algorithm implemented in a FPGA. The developed system was tested with 3 MeV RFQ and 20 MeV DTL, and satisfied the stability requirements.
Keywords :
accelerator RF systems; accelerator cavities; field programmable gate arrays; linear accelerators; proton accelerators; DTL tanks; FPGA board; Proton Engineering Frontier Project; RF amplitude; RFQ cavity; digital PI control system; digital in-phase detection; down-converted cavity signal frequency; electron volt energy 20 MeV; electron volt energy 3 MeV; low level RF control system; phase stability; proportional-integral feedback algorithm; proton linac; pulsed mode operation; quadrature detection; Control systems; Design engineering; Field programmable gate arrays; Linear particle accelerator; Pi control; Protons; Prototypes; Radio frequency; Stability; System testing;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441185
