Welcome to the LHCb Muon DAQ analysis page

This page contains an introduction for reading and analyzing Muon real data acquired during the commissioning phase.

LHCb Online Page

Useful links & documentation

Talks

• Software week Mar 08 talk A. Satta

Links

• Writing data at the pit

Data location

Data files acquired by the LHCB DAQ are written locally (in the online network) to the following directory:

/daqarea/lhcb/data/2008/RAW/ partition / recipe / #runnumber

where

• partition is LHCb for global data taking; MUON, MUONC or MUONA for standalone muon daq;
• recipe is usually PHYSICS

data are automatically migrated to castor (within about one hour) as

/castor/cern.ch/grid/lhcb/data/2008/RAW/ partition / recipe / #runnumber

Beware that files smaller than a few Mbytes could not be copied to Castor.

Early data from the first semi--manual detector DAQ of December 2007 are available for posterity under the local folder /group/muon/testdata and on castor under /castor/cern.ch/user/g/ggiacomo/testdata

Runs

Details on the DAQ conditions during Commissioning are available on the MUON and L0 Trigger electronic logbooks. Here is a short summary of the most important runs

Tips and Tricks for data analysis

Environment

For quick and more online-related jobs, you can also use the machines on the online network:

• ssh lbgw (only from cern network)
• import your code using "cvs co"
• ssh plus
• setup LHCb environment:
  • tcsh shell: source /group/muon/scripts/lhcbsetup.csh
  • bash shell: . /group/muon/scripts/lhcbsetup.sh
• choose your preferred environment (setenvBrunel, setenvOnline, ...)
• access the data from the /daqarea

Data Access

Your job.options file should include the following:

EventPersistencySvc.CnvServices      = {"LHCb::RawDataCnvSvc/RawDataCnvSvc" };
ApplicationMgr.SvcOptMapping    += { "Gaudi::IODataManager/IODataManager" };
#include "$STDOPTS/DstDicts.opts"
EventSelector.Input = {
 "DATA='PFN:rfio:/castor/cern.ch/grid/lhcb/data/2008/RAW/LHCb/PHYSICS/22688/022688_0000011673.raw'SVC='LHCb::MDFSelector'"
}

• runoptions.pl for data on the online network
• runsOnCastor.pl for data on Castor

   ./runsOnCastor.pl [-p partition] [-r recipe] Run

   ./runsOnCastor.pl [-p partition] [-r recipe] Runmin Runmax

The output is a file called "dynamicRun.opts" that you can include in your options files

Running the Muon Monitoring offline

Muon/MuonMonKernel

common tools used by the other packages. This includes an "ad-hoc" fast decoding/reconstruction tool for online monitoring. Note that offline analysis should use the official tools under Muon/MuonDAQ rather than this one;

Muon/MuonMonitor

algorithm for general muon monitoring histograms. The options folder provides some scripts and option files for running the algorithm. Output can be found in the monitor.root file;

Muon/Cosmics

provides a tool for standalone cosmic track reconstruction, using a neural network;

Muon/CosmicMonitor

algorithm for muon monitoring using cosmics;

Muon/MuonOnlineMonitor

provides scripts, configuration files and utilities for running the online monitoring. The options directory includes the "runGaudi" script for running the previous algorithms offline. Here is a sample session on lxplus:

• setenvOnline (default recommended)
• getpack Muon/MuonMonKernel head
• getpack Muon/MuonMonitor head
• getpack Muon/Cosmics head
• getpack Muon/MuonCosmicMonitor head
• getpack Muon/MuonOnlineMonitor head
• cd Muon/MuonOnlineMonitor/v*/cmt
• cmt config
• source setup.csh
• cd ../options
• ./runsOnCastor.pl 22688
• ./runGaudi

-- AlessioSarti , GiacomoGraziani - 23 Jun 2008