Difference: MonteCarloProduction (2 vs. 3)

Revision 32010-11-22 - AlexPenson

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Introduction/Prerequisites

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This page shows how to produce Monte Carlo (using MC10 settings) in a highly parallel way using either condor or pathena.

Pythia event generation and Geant simulation are done in athena release 15.6.12.9. Digitization and reconstruction are in release 16.0.2.3.

All steps can take 10-15 mins per event.

 
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This page shows how to generate, simulate (using AltfastII), and reconstruct events. It assumes you have installed and set up release 14. If not, see Gustaaf's tutorial for setting up a release at Nevis: RunningAnalysis or for setting up a release at BNL: RunningAnalysisAtBNL. You can also set up a release on lxplus at cern by following cern's computing workbook. It may be a good idea to go through the workbook anyway, however, if you intend to do a lot of production, you will not be able to do it on lxplus because of disc space issues. Also, the workbook production runs through the full chain which takes an order of magnitude longer to get through than using Atlfast II.
 

Generation

After your release has been installed and setup, you will need to create a place where you can do your production. For example, mine is ~/workarea/14.2.10/production. Once created, cd to that directory.

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  csc_evgen_trf.py -t 8999 0 100 54298752 WprWZenuqq.jobOptions.py WprWZenuqq.evgen.pool.root NONE NONE
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This generates 100 W'->WZ->enuqq events and stores them in the file WprWZenuqq.evgen.pool.root. This should go rather quickly (around 5 min for 100 events).
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This generates 100 W'->WZ->enuqq events and stores them in the file WprWZenuqq.evgen.pool.root. This should go rather quickly (around 5 min for 100 events).
 

Simulation

The next step is simulation/digitization using Atlfast II. The transform file used here is csc_simul_trf.py. This takes an input evgen file and first simulates what each particle does to the detector, and outputs a file containing a record of where each particle traversed the detector as well as how much energy was deposited in that detector component. The user can save this record as a root file (called a HITS file) if he or she chooses.

 
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