The new ATLAS Fast Track Simulation engine (FATRAS)

A. Salzburger, University of Innsbruck & CERN/PH-ATC

Various physics and detector performance studies with the ATLAS detector require fast simulation techniques for systematic studies in physics analysis. This is due to the very time consuming full detector simulation that does not allow the production of the needed large event samples. The widely used ATLAS fast simulation program ATLFAST, however, is based on intial four momentum smearing and does not allow tracking detector studies on hit level.

Alternatively, the new ATLAS Fast Track Simulation engine (FATRAS) that comes intrinsically with the recently developed track extrapolation package is capable of producing full track information, including hits on track. It is based on the reconstruction geometry and the internal navigation of the track extrapolation package that has been established in the restructured ATLAS offline reconstruction chain. Its modular design allows easy control of the inert material, detector resolutions and acceptance, the magnetic field configuration and the general noise level.

The application of the FATRAS simulation in both, a systematic detector performance study and a physics analysis will be presented.

-- AndreasSalzburger - 14 Oct 2005

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Topic revision: r2 - 2005-10-14 - AndreasSalzburgerSecondary
 
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