1. University of Wisconsin at Madison
DCOPS DAQ Status
James N. Bellinger
University of Wisconsin at Madison
June CMS Week 2007

2. Review Multiple-fork program runs on a Linux PC
Reads selected DCOPS based on configuration in database
Reads DCOPS via terminal server
Controls lasers using DIM
Writes fitted data to database on omdb
Writes profiles to database on omdb (will purge periodically)
Provides error information via DIM
Does not include DCOPS calibration info

3. Problems May need revision in table for compatibility
Intermittent crashes, apparently in the DIM interface
Minus side ambient light levels are so high that the DCOPS are often saturated. Light shields are being designed; not a big problem when disks closed
Commissioning Plus side:
Secure network →Separate instance of DAQ (hack needed)
Questions about DIM visibility through firewall
May need revision in table for compatibility

4. Why are the fits often poor?
PT1
ME-2/SLM1 : Laser at PT4 is on

5. Profiles are often poor
Of 40 profiles
12 are saturated
12 laser misses
16 are usable
We have very high
ambient light levels
Temporary light
shields are
being prepared
Laser at this end

6. Database Read-back
Readback of data seems to work fine under program control, though
coordination with analog needs tweaking. This will be fixed quickly.
Readback of the raw
profiles works now.

7. Other Progress
DCOPS calibration database exists and is populated; indexed by new COCOA names
Single read utility for alignment works

8. Immediate Plans for DAQ
Debug DIM interface (?) crash
SL4 for final system and Plus side commissioning
SL3 for Minus side commissioning
Coordinate DCOPS and Analog

9. DAQ I/O Requirements Telnet communication with
the terminal servers and DIM
communication with the DNS
node are essential for the
operation of any DCOPS DAQ.
Designed to use Root/Oracle
interface
Maintenance requires SSH
access
Compiling and running uses
shared libraries currently
found in AFS space.

10. FireWall Telnet blocked: Not a problem SSH blocked: Gateway system
is planned
Keep local copies of libraries
for reliability
DIM: I assume DIM command
will pass through the
firewall, but need
confirmation
Oracle: Need confirmation

11. Other Plans Clean up database
Work out details for using DCOPS calibration and create tool for applying them usefully