This paper will present the requirements and design of the Timing Synchronization System for the Continuous Electron Beam Accelerator Facility control system at Thomas Jefferson National Accelerator Facility. A clock module has been designed to reside in a VME crate with a master front-end computer and communicate with the Data Acquisition VME crates and their front-end computers via a serial fiber optic line. Configuration of the clock modules is jumper and software selectable. The application that motivated the development of the Timing Synchronization System, the Accelerator 30 Hz System, will also be presented. This system needs less than lms time differential between the data acquisitions on the various DAQ front-end computers in order to gather correlated information. The development of and our operational experience with this application using the new timing synchronization system will be discussed.

Work performed for the U.S. Department of Energy by the Southeastern Universities Research Association under contract DE-AC05-84ER40150.

Authors: Marie Keesee, Richard Dickson, Hari Areti, Roger Flood

Submitted for ICALEPCS 2001, San Jose, CA, Nov. 27-30 2001

Updated April 18, 2001

maintained by the Publications Manager