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

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dqm for the rpc subdetector

DQM for the RPC subdetector

M. Maggi and P. Paolucci

outlook
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

rpc dqm requirements
RPC DQM requirements

DQM has to monitor the RPC detector/trigger behavior and measure and summarize their performances:

  • Fast online DQM  few histo/plot/result and summary results for central DQM shifter
  • “quasi” online DQM  producing more and more info for RPC shifter and expert
  • offline DQM  full analysis for expert

DQM workshop - 28 feb 07

rpc dqm requirements1
RPC DQM requirements

We need two different kind of DQM analysis data:

  • Fast and “low” statistics analysis:
    • BXN
    • # of digi
    • Occupancy
    • Cluster multiplicity
    • Cluster size
    • ……………….
  • Slower and high statistics analysis:
    • Chamber efficiency
    • Strip efficiency
    • Efficiency Map or chamber radiography (10 cm2)
    • Calibration (eff .v.s HV)
    • DCS – DQM – XDAQ Correlation

DQM workshop - 28 feb 07

dqm modes of operation i
DQM Modes of Operation I
  • Online in Filter Farm
    • Input rate: up to 100 kHz
    • Event Building: Yes
    • CPU: 10-0% of HLT CPU
    • Bw: 5-0% of total bw (1 GB/s)
    • Delay: 0
  • Online in Event Consumer
    • Input rate: 1-10 Hz aggregate
    • Event Building: Yes
    • CPU: subsystem CPUs
    • Bw: consistent with experiment network
    • Delay: seconds

EXP. NETWORK

MUST USE CMSSW

MUST USE RC

LIMITED ACCESS TO DB

DCS: NO

DAQmon: NO

EXP. OR CAMPUS NETWORK

MUST USE CMSSW

CAN USE RC

FREE ACCESS TO DB (EXP)

DCS: via PSX or DB

DAQmon: via DB

DQM workshop - 28 feb 07

dqm modes of operation ii
DQM Modes of Operation II
  • Quasi-online processing local file from SM
    • Input rate: O(10) Hz aggregate
    • Event Building: Yes
    • CPU: subsystem CPUs
    • Bw: consistent with experiment network
    • Delay: minutes
  • Offline processing
    • Input rate: virtually all data stored (O(100Hz))
    • Event Building: Yes
    • CPU: batch farm
    • Bw: consistent with campus network
    • Delay: ~ 1 hour

EXP. OR CAMPUS NETWORK

MUST USE CMSSW

CAN USE RC

FREE ACCESS TO DB (EXP)

DCS: via DB

DAQmon: via DB

GRID

MUST USE CMSSW

CANNOT USE RC

ACCESS TO OFFLINE DB ONLY

DCS: indirectly via condDB

DAQmon: NO

DQM workshop - 28 feb 07

what dqm do we need i
What DQM do we need ? I
  • Online monitoring in Filter Farm:
    • Rate of 100 KHz is perfect for high statistics analysis (calibration - efficiency)
    • pre-scaled subset of LV1 muon events (rate ?)
    • Can we effort a delay of 0 sec ?
    • Can we run high statistics analysis on CMS CPUs ?
    • No use of DCS and limited access to CondDB
  • Online monitoring in event consumer:
    • Rate of 10 Hz is not enough for high statistics analysis
    • Full use of DCS and XDAQ data via DB
    • RPC CPUs (to design)
    • delay of seconds is OK for our goal

DQM workshop - 28 feb 07

what dqm do we need ii
What DQM do we need ? II
  • Quasi-online DQM:
    • Rate of 10 Hz is not enough for high statistics analysis
    • LV1 muon events
    • DCS and XDAQ access via CondDB (free access)
    • RPC CPUs
    • delay of minutes is OK
  • Offline monitoring:
    • for RPC experts to have a full analysis including reco tools and muon track or physics object (J/psi, Z…)
    • Using full events and reconstruction tools
    • free access to the DBs
    • CMS CPus
    • delay of hours is OK

DQM workshop - 28 feb 07

can we do high statistics analysis
Can we do high statistics analysis ?
  • To achieve high statistics analysis (efficiency and calibration) we need:
    • high rate of muon LV1A trigger (DT-CSC and/or RPC)
    • CPUs and delay of minutes
    • ≈ 1K (chamber) + 100 K (strip) + 1 M (area) bins (non so much compared with CMS).
    • At 1KHz  3.6 Mtrack/hour  21 Mhit/hour.
    • 1 min for Effchamb – 1 hour for Effstrip – 100 hours for Effarea
    • Full use of DCS and DBs ??
  • Ask for a special RPC calibration stream (size ?) including: RPC data + some DT and CSC data
  • Store RPC stream on disk and use them for online and offline DQM (disk space ??)

DQM workshop - 28 feb 07

event data monitoring status i

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

event data monitoring status ii
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

guidelines answers
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

rpc synoptic view
RPC synoptic view

We have to work on

The synoptic view of RPC system with interactive features, alarm, warning and error

Similar to the DCS one and to the other CMS subsystems

DQM workshop - 28 feb 07

do we need more tools yes
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

do we need more tools yes1

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

histos example for mtcc
Histos example …. for MTCC

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

a way to use in a safe way conddb

DQM/Offline

Application

DCS/DQM

Application

Transformation

(O2O)

[email protected]

[email protected]

[email protected]

read/write

objects

read/write

objects

HLT-CMSSW application

Reconstruction-CMSSW application

A way to use in a safe way condDB

DQM workshop - 28 feb 07

rpc dqm group composition
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

conclusions
Conclusions
  • The RPC-specific components of the DQM structure in CMSSW are under development to test on MTCC data with proper Global DAQ format.
  • The development now must focus now on:
    • Quantify high statistics analysis (RPC stream or FF analysis or both ?)
    • Study the way to Interface DQM with DCS-XDAQ and with CondDB
    • Select a few number of “smart” summary histo/plot/tables
    • Study how produce RPC system flag
    • Develop: detector visualization and web interface, quality test producing warning, error and alarm with a tree-like structure

DQM workshop - 28 feb 07

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