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

fYear

2007

fDate

25-29 June 2007

Firstpage

2167

Lastpage

2169

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4441185

Filename

4441185