Common use of HEP Applications Clause in Contracts

HEP Applications. The 4 LHC experiments (Atlas, XXXXX, CMS, LHCb) each have developed functioning distributed computing systems over the past few years. In the past 2 years they have made good progress in integrating Grid technology into these systems, notably in Europe with DataGrid, DataTAG and Nordugrid software, and in the US with software from the various US projects. The experiments have also produced significant grid software, for example the Alien system of XXXXX and the DIRAC system of LHCb. They will continue this work in the context of the LCG project which aims at providing a production service to the experiments. The main experiment applications are currently the generation of vast quantities of simulated data necessary for the preparation of the experiments and LHC start-up in 2007, and their reconstruction and analysis. In addition to this highly organised data production work there is the computing associated with thousands of physicists and engineers all over the world accessing the data for individual analyses. The load characteristics associated with the analysis work are highly variable and will place very special demands on the grid for resource allocation and quality of service. The principal function of the team of 8 people (see ‘funded/unfunded participants’ for group organisation), employed by and based at CERN, will be to work with the 4 LHC experiments, to ensure their requirements are taken into account, to give practical help in interfacing the experiment application to grid services, and to evaluate the performance of the software deployed within the LCG service environment, as well as in pre- production testbeds. It is foreseen that non-LHC experiments, as they have done in DataGrid, will participate in EGEE. Current examples are US based experiments, BaBar and D0, which are currently taking production data and are basing their medium-term computing strategy on distributed computing resources served by a powerful Grid. These will be supported on a best-efforts basis.

HEP Applications. The 4 LHC experiments (Atlas, XXXXX, CMS, LHCb) each have developed functioning distributed computing systems over the past few years. In the past 2 years they have made good progress in integrating Grid technology into these systems, notably in Europe with DataGrid, DataTAG and Nordugrid software, and in the US with software from the various US projects. The experiments have also produced significant grid software, for example the Alien system of XXXXX and the DIRAC system of LHCb. They will continue this work in the context of the LCG project which aims at providing a production service to the experiments. The main experiment applications are currently the generation of vast quantities of simulated data necessary for the preparation of the experiments and LHC start-up in 2007, and their reconstruction and analysis. In addition to this highly organised data production work there is the computing associated with thousands of physicists and engineers all over the world accessing the data for individual analyses. The load characteristics associated with the analysis work are highly variable and will place very special demands on the grid for resource allocation and quality of service. The principal function of the team of 8 people (see ‘funded/unfunded non-contracting participants’ for group organisation), employed by and based at CERN, will be to work with the 4 LHC experiments, to ensure their requirements are taken into account, to give practical help in interfacing the experiment application to grid services, and to evaluate the performance of the software deployed within the LCG service environment, as well as in pre- pre-production testbeds. It is foreseen that non-LHC experiments, as they have done in DataGrid, will participate in EGEE. Current examples are US based experiments, BaBar and D0, which are currently taking production data and are basing their medium-term computing strategy on distributed computing resources served by a powerful Grid. These will be supported on a best-efforts basis.

HEP Applications. The 4 LHC experiments (Atlas, XXXXX, CMS, LHCb) each have developed functioning distributed computing systems over the past few years. In the past 2 years they have made good progress in integrating Grid technology into these systems, notably in Europe with DataGridDataGRID, DataTAG and Nordugrid software, and in the US with software from the various US projects. The experiments have also produced significant grid software, for example the Alien system of XXXXX and the DIRAC system of LHCb. They will continue this work in the context of the LCG project which aims at providing a production service to the experiments. The main experiment applications are currently the generation of vast quantities of simulated data necessary for the preparation of the experiments and LHC start-up in 2007, and their reconstruction and analysis. In addition to this highly organised data production work there is the computing associated with thousands of physicists and engineers all over the world accessing the data for individual analyses. The load characteristics associated with the analysis work are highly variable and will place very special demands on the grid for resource allocation and quality of service. The principal function of the team of 8 people (see ‘funded/unfunded participants’ for group organisation), employed by and based at CERN, will be to work with the 4 LHC experiments, to ensure their requirements are taken into account, to give practical help in interfacing the experiment application to grid services, and to evaluate the performance of the software deployed within the LCG service environment, as well as in pre- pre-production testbeds. It is foreseen that non-LHC experiments, as they have done in DataGridDataGRID, will participate in EGEE. Current examples are US based experiments, BaBar and D0, which are currently taking production data and are basing their medium-term computing strategy on distributed computing resources served by a powerful Grid. These will be supported on a best-efforts basis.