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Event generation on the farm with OSCAR
Here
we will generate some events using OSCAR (Object
oriented Simulation for Cms Analysis and Reconstruction), the
GEANT4 based CMS detector simulation. First we
create the OSCAR directory structure and set up the environment
correctly.
cd $TOP
scram project OSCAR OSCAR_2_4_6
cd OSCAR_2_4_6/src
cmscvsroot OSCAR
You
will need to login the first time using cvs
login and password:
98passwd
cvs
co -r OSCAR_2_4_6 Workspace
cd Workspace/
eval `scram runtime -csh`
rehash
The
oscar executable is provided with the OSCAR release so let's
not compile it here.
In the ORCA part we will learn how to build executables.
The OSCAR simulation part is very time consuming. It takes
at least a day (24 h) to simulate 300 Z'-> jj events.
If you are not serious about the output don't use up all
the slots in the batch system for lengthy jobs! Be nice to
your fellow physicists! So let's only produce a few events
here.
cd
$SCRIPTS
setup kerberos
setup fbsng
fbs submit zprime_jj_oscar.jdf 8 10000 5
This
will submit job with 8 processes into the batch queue where
each process
will process 5 events (That will take about half an hour.)
1. General
setup
2. Event generation on the farm with CMKIN (Pythia),
Analysis of the generator level output
3. Simulate the events with OSCAR
4. Digitize with ORCA
5. Run a small ntuple maker ( from Stephan's
ORCA tutorial) looking at Calorimeter quantities
6. Run the JetMet ntuple maker and make some plots
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