Speaker
Dr
Matthias Wittgen
(SLAC)
Description
The BaBar slow control system uses EPICS (Experimental Physics and
Industrial Control System) running on 17 VME based single board computers (SBCs).
EPICS supports the real-time operating systems vxWorks and RTEMS.
During the 2004/05 shutdown BaBar started to install a new detector
component, the Limited Streamer Tubes (LST), adding over 20000 high
voltage channels and about 350 monitoring tasks to the control system.
During 2005 data taking 5 out 17 SBCs were replaced by PowerPC SBCs
running RTEMS. Due to a lack of debugging and monitoring tools and memory
and task management limitations on RTEMS,
the decision was made to run Linux instead. Only a few EPICS drivers
needed to be ported. Running EPICS on Linux provides a very stable
environment and better debugging and monitoring tools than vxWorks or
RTEMS. Many existing bugs in BaBar detector control applications could be
discovered and fixed.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | BaBar |
|---|
Author
Dr
Matthias Wittgen
(SLAC)
