Digital RF control for spallation neutron source accumulator ring

Author

Ma, Hengjie ; Kasemir, K. ; Champion, M. ; Crofford, M. ; Hardek, T. ; Piller, M. ; Zhang, Y.

Author_Institution

ORNL, Oak Ridge

fYear

2007

fDate

25-29 June 2007

Firstpage

611

Lastpage

613

Abstract

The proposed upgrade plan for the rf control of the spallation neutron source (SNS) accumulator ring requires that the new digital field control module (FCM) have the capability of adaptive feed forward (AFF) compensation for the heavy beam loading in the cavities. The feed forward compensation capability should support both the conventional software driven AFF algorithm and a new beam current driven AFF algorithm. A user-friendly Epics GUI for all the FCM functionalities is also a part of the requirement. The first prototype for test has been built. It is a narrowband system based on the conventional I/Q sampling scheme. Both the hardware and software are currently under test in the lab, and the field test in a near future has been planned.

Keywords

accelerator RF systems; accelerator control systems; control engineering computing; digital control; graphical user interfaces; human computer interaction; linear accelerators; neutron sources; particle beam injection; physics computing; I/Q sampling scheme; SNS Linac FCM; Spallation Neutron Source accumulator ring; adaptive feed forward compensation; beam current; beam injection; beam loading compensations; digital field control module; digital rf control system; software driven AFF algorithm; user-friendly Epics GUI; Adaptive control; Digital control; Feeds; Graphical user interfaces; Neutrons; Programmable control; Radio frequency; Software algorithms; Software prototyping; Software 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.2007.4440295

Filename

4440295