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Welcome to the LHCb Muon DAQ analysis page

These page contain an introduction for the DAQ data analysis.

LHCb Online Page

Useful links & documentation



Data location

Data files taken with DAQ from Control Room are written in the directories:

  • LHCb acquisition: /daqarea/lhcb/data/2008/RAW/LHCb/PHYSICS/#runnumber
  • MUON acquisition (e.g. side C): /daqarea/lhcb/data/2008/RAW/MUONC/PHYSICS/#runnumber
20774 - 20778 * Some test data can be found on the online cluster in /group/muon/testdata or on castor /castor/


Run type Run number Run description Activity Sorted ascending
Cosmics 22788 Taken with aligned Calo LHCb
Noise 22902 Just testing the acquisition on side C MUONC

Procedure for data analysis

Data Access

Lots of useful informations are kept in the data online page. To directly access data on the online cluster you need

  • First of all you should log onto the online cluster (e.g. linux: ssh -X
  • Then you should log into the plus01 machine: ssh plus01
Otherwise you can access data on castor
  • Data is copied to castor every hour. E.g. data under /daqarea/lhcb/data/2008/RAW/MUONC/PHYSICS/#runnumber can be found in castor: /castor/
    • To check if your favourite run is there try for example: rfdir /castor/
  • You can run either on raw or MDF files......
    • EventSelector.Input += {"DATAFILE='PFN:rfio:///castor/' TYP='POOL_ROOT' OPT='READ'"};
    • EventSelector.Input += {"DATA='rfio:///castor/' SVC='LHCb::MDFSelector'"};

Data Analysis

To run your favourite monitor you can start, on lxplus, using
  • setenvBrunel (default recommended)
  • getpack Muon/MuonMonitor (default again)
  • getpack Rec/Brunel (def)
  • compile Brunel after having added MuonMonitor to the requirements
  • You can now change the User_realdata.opts file to point to your raw data information.....
  • To run analysis you can just: $BRUNELROOT/slc_.../Brunel.exe $MUONMONITORROOT/options/gaudi_realdata.opts
This chain has been tested with Brunel_v32r5 + MuonMonitor v2r3 A monitor.root files is created!

LHCb Online Presenter

Instructions on how to run the LHCb Online Presenter and see Muon monitoring histograms

  • login on some node on the LHCb online network (look here for instructions)
    • for Linux:
      • setup LHCb environment:
        • tcsh shell: source /group/muon/scripts/lhcbsetup.csh
        • bash shell: . /group/muon/scripts/
      • start the presenter: /group/muon/scripts/runpresenter
    • for M$ windoz (discouraged)
      • set DIM_DNS_NODE=hlte1101
      • g:\online\presenter\presenter.bat
  • browse through the page tree on the left, look in "Muon Commissioning"
  • single click on your favourite page
  • if you see no histograms, you're unlucky! (it means we are not running the monitoring at the moment), try again later

-- AlessioSarti - 14 May 2008

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Topic revision: r2 - 2008-05-15 - AlessioSarti
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