HEPIC actively participates in the data processing steps of the ALICE (LHC) and STAR (RHIC) experiments through the SAMPA (Advanced Analysis and Multi-Processing System) computer cluster, located at the Nuclear Physics Department of the Physics Institute of the University of São Paulo (IFUSP). SAMPA is mainly dedicated to the intensive analysis of data and simulations obtained through both experiments, in addition to contributing to the activities of several researchers in the area at the institute.
SAMPA is one of many clusters around the world that use grid computing technology, where processing and storage of a huge amount of data is possible thanks to the distribution of processing among multiple institutions. Besides SAMPA, OSG (Open Science Grid) and LCG (LHC Computing Grid) are other important systems for the computational activities involving the RHIC and LHC data, respectively. In 2005, SAMPA was the first computational site outside the United States to become a member of the OSG.
After leaving the OSG group a few years later, SAMPA joined the LCG system when HEPIC became a member of the ALICE experiment. The integration was completed in mid-2010, with SAMPA being one of more than 140 computational sites (including that of CBPF, the Brazilian Center for Physical Research, in Rio de Janeiro) spread over more than 35 countries, which are dedicated to processing the information gathered by the LHC experiments.
Picture of the hardwares that are part of the cluster.
In the figure below, we show the centers that process the data from ALICE, where the University of São Paulo in the southern hemisphere stands out.
Map of the WLCG/ALICE.