All digital IQ servo-system for CERN linacs

Author

Rohlev, A. ; Serrano, J. ; Garoby, R.

Author_Institution

CERN, Geneva, Switzerland

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2336

Abstract

A new VME based system has been developed and built at CERN for the servo loops regulating the field in the linac accelerating structure. It makes use of high speed digital IQ detection, digital processing, and digital IQ modulation. The digital processing and IQ modulation is done in a single PLD. The system incorporates continually variable set points, iterative learning, feed forward as well as extensive diagnostics and other features well suited for digital implementations. Built on a single VME card, it will be first used in the energy ramping RF chain of the CERN heavy ion linac (linac 3) and later for upgrading the present proton linac (linac 2). This system serves also as a prototype for the future superconducting proton linac (SPL). The design principle and the experimental results are described.

Keywords

accelerator RF systems; accelerator cavities; accelerator control systems; ion accelerators; iterative methods; linear accelerators; physics computing; proton accelerators; CERN heavy ion linac; PLD; VME based system; continually variable set points; design principle; digital IQ modulation; digital IQ servo-system; digital processing; energy ramping RF chain; extensive diagnostic capability; feed forward iterative learning loop; field regulation; high speed digital IQ detection; linac accelerating structure; low level cavity control system; servo loops; single VME card; superconducting proton linac; Acceleration; Digital modulation; Feeds; Field programmable gate arrays; Filters; Klystrons; Linear accelerators; Protons; Radio frequency; Servomechanisms;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289110

Filename

1289110