1. DQM for the RPC subdetector
M. Maggi and P. Paolucci

2. Outlook RPC DQM requirements
event Data DQM – what we have done and learned during the MTCC
we need more “sophisticated” DQM tools to access online database (non event data)
guidelines and open issues
DQM group composition
conclusions
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

3. RPC DQM requirements
DQM has to monitor the RPC detector/trigger behavior and measure and summarize their performances:
Online monitoring for CMS shifters: DQM and DCS providing: Histograms, trending and correlation plots, numbers, alarms …. and references … using a pre-scaled subset of LV1 muon events and Condition DB
Quasi-online monitoring for RPC shifters: using all the LV1 muon events (more statistics) and Condition DB
Offline monitoring for RPC experts to have a full analysis: using the CMS events, reconstruction tools, DBs ……
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

4. Event Data monitoring STATUS I
DQM-analysis packages developed for RPC in CMSSW and test during the MTCC:
EventFilter/RPCRawToDigi (Segoni - Maggi): It drives the raw data unpacking and produces the RPCDigi collection committed to the event.
DQM/RPCMonitorModule (Segoni – Maggi): it carries out data integrity check and basic detector functioning tasks
POOL Source
Raw Data
Digi
Unpacker
DAQ
Clusters/RecHits
Local Muon Reconstruction
RPCMonitorDigi
RPCMonitorModule
Event
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

5. Event Data monitoring STATUS II
DQM/RPCMonitorDigi: Uses the digi produced by the unpacker (i.e. for each h-partition the collection strip with signal and the BX ) to perform chamber performance checks:
BXN
# of digi
Occupancy
Cluster multiplicity
Cluster size
Sync: Specific trigger studies
Chamber efficiency is produced by extrapolating DT segments to the RPC mounted on the same DT chamber and looking for matching hits
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

6. Guidelines answers
YES, we need history/trendig plots (efficiency, occupancy, cluster size…)
YES, we need correlation trends
YES, we need tools to extract complex info from condition DB and repository
YES, we are using IGUANA to present DQM results
MORE, we have to work on how make histo/result persistent
MORE, we developed a first prototype of a synoptic view
YES, we have a clear hierarchical view of the plots
NO, automatic analysis procedures, for the moment
YES, we can converge on a run quality flags but we have to work on
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

7. RPC synoptic view We are working on to have a full
synoptic view of our system with interactive
features, alarm, warning and error
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

8. Do we need .. More .. Tools ? YES
For RPC it is CRUCIAL to correlate event data DQM info with PVSS and XDAQ non event data:
Chamber efficiency .vs. Noise (XDAQ)
Chamber efficiency .vs. Current (PVSS)
Noise (XDAQ) .vs. Temperature (PVSS)
Cluster size .vs Temperature (PVSS)
…………………………………………..
To let understand the behavior of the RPC system we need:
few summary plots for the DQM shifter (online)
more plots for RPC shifter (quasi-online)
a complete way to analyze data for the RPC expert (offline)
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

9. Do we need .. More .. Tools ? YES
For MTCC data we developed the following tool CAT
For data tacking we want to integrate it in the DQM but we need to take some decisions:
How access online at the Condition DB: direct access to the DB or to a replication of the DB ??
Which and how many plots we want to store permanently ??
Do we need reference plots also for correlated data ??
Can we show/store in the DQM full DCS and XDAQ histograms/results too ??
Analysis tools
Online DB
Root files
DB query
histograms
DB replication
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

10. Histos produced during the MTCC using CAT
Having 480 chambers only in the barrel it was very useful to have summary plot from DCS (retrieving data from cond. db).
We need to think about more summary plots from DQM–DCS–XDAQ
RMS distribution of the 23 chambers for a 4 days period with magnet ON and stable conditions
RMS = 0.5 mA
Chamber to check using more info from DCS-DQM-XDAQ for RPC expert
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

11. A way to use DB DQM/Offline DCS/DQM Application OMDS@IP5 ORCON@IP5
HLT-CMSSW application
Reconstruction-CMSSW application
read/write
objects
Transformation
(O2O)
DCS/DQM
Application
DQM/Offline
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

12. The open issues … for us
How many CPUs on Filter Farm will be used for DQM (0-10% of HTL) ?
Which muon trigger downscale we can effort ?
Can we have a muon rate of KHz in the Filter Farm ?
What can we run on the Storage Manager ?
Which latency we can effort for non-event data (Online DB duplication in IT) ?
Do we need dedicated RPC CPUs and disks to run the quasi-online DQM ?
How have an unique graphical interface for DCS-DQM-XDAQ to help people in shift ?
Questions will be already answered here
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

13. RPC DQM group composition
The group works in the DPG under the supervision of M. Maggi and myself and in contact with Muon DPG people.
detector DQM:
Bari – 4 people  sharing with Offline/DQM
Napoli – 5 people  sharing with DCS
Pavia – 2 people  sharing with Reco & Ev Displ.
trigger DQM:
Warsaw group  sharing with trigger activities
We need people from the endcap groups
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci

14. Conclusions
The RPC-specific components of the DQM structure in CMSSW are well under development and tested on MTCC data with proper Global DAQ format.
The development now must focus now on:
Interface DQM with the Condition DB
Production of historical plots, with interface to off-line DB
Select a few number of “smart” summary histo/plot/tables
Use also higher level objects (muon tracks, reco tools….)
We are developing: detector visualization and web interface, quality test producing warning, error and alarm and tree-like structure for histo, plot….
DQM workshop - 28 feb 07
M. Maggi and P. Paolucci