DQM for the RPC subdetector

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

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

4. RPCMonitorModule RPCMonitorDigi DAQ Unpacker Local Muon Reconstruction Raw Data Digi Clusters/RecHits Event POOLSource 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 DQM workshop - 28 feb 07

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

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

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

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

9. DB query Analysis tools Online DB Root files histograms 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 ?? DB replication DQM workshop - 28 feb 07

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

11. DQM/Offline Application DCS/DQM Application Transformation (O2O) ORCOFF@T0 OMDS@IP5 ORCON@IP5 read/write objects read/write objects HLT-CMSSW application Reconstruction-CMSSW application A way to use DB DQM workshop - 28 feb 07

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

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

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