Analog components configuration and test results for PEFP LLRF system

Author

Seol, K.T. ; Kwon, H.J. ; Kim, H.S. ; Kim, D.I. ; Cho, Y.S.

Author_Institution

KAERI, Daejeon

fYear

2007

fDate

25-29 June 2007

Firstpage

2170

Lastpage

2172

Abstract

The PEFP LLRF system for the 3MeV RFQ and 20MeV DTL has been developed. The stability of plusmn1% in the amplitude and plusmn1deg in the phase is required. Therefore, the drift of the analog components should be low to satisfy the requirement. Analog chassis as a prototype of LLRF system is configured and tested. RF components including an IQ modulator, an RF switch, a mixer, phase comparators, RF splitters, RF filters and trip circuit for high VSWR are installed in this chassis. This performs the shift of RF amplitude and phase from IQ signal, down-conversion to 10MHz IF signal, interlock for arc and high VSWR, and RF/clock distribution. The amplitude and phase stability of each component are measured to check the effect on the whole system performance. The detailed configuration and test results are presented.

Keywords

accelerator RF systems; accelerator cavities; filters; ion sources; modulators; particle beam stability; proton accelerators; DTL; IQ modulator; PEFP LLRF system; RF filters; RF splitters; RF switch; RF-clock distribution; RFQ; VSWR; amplitude stability; analog components configuration; phase comparators; phase stability; proton accelerator; trip circuit; Circuit testing; Filters; Phase modulation; Prototypes; RF signals; Radio frequency; Stability; Switches; Switching circuits; 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.2007.4441186

Filename

4441186