AMANDA-II Experiment Located at the Geographic South Pole

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Presentation transcript:

Condor Application in AMANDA-II for Paolo Desiati UW - Physics Department

AMANDA-II Experiment Located at the Geographic South Pole 1500-2000 m depth 200 m diameter / 500 m tall ~700 optical sensors Detects rare subatomic particles called neutrinos () Visible only when they interact in the Earth () Huge background from atmospheric events Contamination by down-going  particles They are not produced by neutrinos They are 100,000 more than up-going events The event reconstruction tries to remove background Need to simulate as much background as possible

AMANDA-II simulation chain CORSIKA (atmospheric shower events) FORTRAN Generates 100,000 events (x100 oversampled) MMC (event propagation through the ice) JAVA Generates cross section tables once, then very fast AMASIM (detector response simulation) FORTRAN/C Reads geometry/electric/hardware steering info Reads photon-tables to simulate sensor response 500 MB phototables Reconstruction (event reconstruction as in real data) C libraries Many programs used in a pipe structure

Simulation Times Average execution time per file is ~ 3 hours AMASIM detector simulation takes ~ 64 % Our simulation need further optimization in the next future However the goal would be to generate ~ 1 year worth number of background events

Condor for AMANDA-II Used Time Evicted Time Total Time 151,750 hours Thanks to Erik Paulson set of scripts running the simulation chain Vanilla universe, no checkpoint Up to 200 CPU can be used Could generate ~ 1 day livetime / CPU-day In 70 days 151,750 hours used in an average of ~120 CPU Effective generated ~ 0.4 days livetime / CPU-day Generated ~30 days livetime from February 6th We estimate we can increase the simulation speed by at least 50% IceCube (the future km3 scale detector) will have new and fast simulation software Used Time Evicted Time Total Time 151,750 hours 58,150 hours 209,900 hours