PHOS APD Bias Control Goal: To develop software for the PHOS APD bias control that uses the agreed ALICE standards for detctor control and coniguration.

Different ways for controlling the APD bias voltages Labview interface used in 2004, uses the RCU-sh interpreter via SSH. Minor modifications needed in order to to work with new firmware (2-3 days) –Does not comply with agreed standards. Micro code on the DCS command line via the the RCU-sh command interpreter. –Useful for debugging, but to tedious and difficult for upcoming beamtest –Does not comply with agreed standards. APD bias control based on ROOT, DIM and FEE server/client software developed in Bergen. Huge progress made Dec 2005 – March 2006 by Bergen/Oslo. Some more development needed (2-4 weeks). –Complies with ALICE standards. –API for APD bias contrloll can be integrated in the final DCS system. –Could also implement FEEC temperature monitoring and logging.

RCU PHOS FEEC DCS card Fee Server (DIM) PHOS CE Fee Client (DIM) APD GUI 1 DIM DNS Request service Register service Service info Service data Subscribe to service 1 ”Execute” ”Command + data” 1 Intercom Layer Fee Client (DIM) FED server (DIM) PVSS FED client (DIM) = Configuration files Configuration Data base BLOBs (SQL) Future systemCurrent System Ethernet DCS/RCU Mezzanine RCU backplane PC Detector Outside world

Test setup in Oslo/Bergen DID Information display APD GUI Firewall DCS one Front end Card DIM DNS University of Oslo Home University of Bergen Request service Service info Register service Subscribe to service & download APD values

Summary Communication chain DIM client/server and DIM DNS. –Status: Done Downloading and applying APD configuration via DIM client/server and Feeserver software developed in Bergen –Status: Done Temporary Solution for configuration database –Status: Done Integration into PVSS II. –Status: To Do Implementation of final configuration Database –Status: To Do Testing of system with lates version of boardcontroller and FEECs –Status: To Do