27 September 2004 to 1 October 2004
Interlaken, Switzerland
Europe/Zurich timezone

Simulation and reconstruction of heavy ion collisions in the ATLAS detector.

30 Sep 2004, 10:00
1h
Coffee (Interlaken, Switzerland)

Coffee

Interlaken, Switzerland

Board: 60
poster Track 2 - Event processing Poster Session 3

Speaker

P. Nevski (BROOKHAVEN NATIONAL LABORATORY)

Description

The ATLAS detector is a sophisticated multi-purpose detector with over 10 million electronics channels designed to study high-pT physics at LHC. Due to their high multiplicity, reaching almost hundred thousand particles per event, heavy ion collisions pose a formidable computational challenge. A set of tools have been created to realistically simulate and fully reconstruct the most difficult case of central Pb-Pb collisions (impact parameter < 1 fm) in the ATLAS detector. A number of issues concerning extensive memory management, CPU versus memory optimization, tradeoff between data volume and physics analysis capacity have been formulated and solved. As a result we are able to predict and optimise the physics performance of the experiment and its sub-systems. We will describe the optimal dataflow organization and solutions which allowed flexible system tuning during the massive simulated data production and the analysis of tens of thousand of multi-megabyte events.

Primary author

P. Nevski (BROOKHAVEN NATIONAL LABORATORY)

Presentation Materials

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