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Exploiting the Grid to Simulate & Design the LHCb Experiment Calorimeters LHCb is a particle physics experiment Yoke Tracker Shielding which will study the subtle differences Coil between matter and antimatter. The design and construction of the experiment is being undertaken by 500 scientists from 48 institutes in 14 countries around the world. The experiment will be located 100 m RICH-2 underground at the Large Hadron Collider Vertex (27 km circumference) which is being built RICH-1 at CERN in Geneva. Muon Detector Moun Over 1000 million short lived particles of matter and antimatter called B and B-bar mesons (which contain the b quark) will be studied at LHCb each year. In order to design the detector and to understand the physics, many millions of simulated events also have to be produced. 10 mm We are using Grid technology so that we can use computing resources distributed around the world to satisfy our requirements. A prototype system has been built which is based on our existing software. Data. Grid middleware is being deployed as it becomes available. In this way, LHCb is able to produce simulated datasets as well as feeding back our experience and ideas into the design of the Grid. Compute Element Storage Element mss Local disk Job Data CERN TESTBED globus-url-copy Data register-local-file publish Replica Catalog (NIKHEF) REST-OF-GRID replica-get Storage Element Job Data Computing centres on the Grid are gradually being added into the LHCb production system as they come online. Currently, these include: CERN, FRANCE - IN 2 P 3(Lyon), ITALY – Bologna, NETHERLANDS – NIKHEF, as well as the EU Data. Grid Testbed. In the UK, LHCb computing and software centres are sited at the Universities of Bristol, Cambridge, Edinburgh, Glasgow, Imperial College, Liverpool & Oxford and Rutherford Appleton Laboratory.
Submit jobs remotely via Web Execute on Grid Transfer data to mass store Update bookkeeping database Data quality check