Abstract
Petaflop architectures are currently being utilized efficiently to perform large scale computations in Atomic, Molecular and Optical Collisions. We solve the Schrödinger or Dirac equation for the appropriate collision problem using the R-matrix or R-matrix with pseudo-states approach. We briefly outline the parallel methodology used and implemented for the current suite of Breit-Pauli and DARC codes. In this report, various examples are shown of our theoretical results compared with experimental results obtained from Synchrotron Radiation facilities where the Cray architecture at HLRS is playing an integral part in our computational projects.
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Acknowledgements
A Müller acknowledge support by Deutsche Forschungsgemeinschaft under project number Mu 1068/10 and through NATO Collaborative Linkage grant 976362 as well as by the US Department of Energy (DoE) under contract DE-AC03-76SF-00098 and grant DE-FG02-03ER15424. M S Pindzola and C P Ballance were supported by US Department of Energy (DOE) and US National Science Foundation grants through Auburn University. B M McLaughlin acknowledges support from the US National Science Foundation through a grant to ITAMP at the Harvard-Smithsonian Center for Astrophysics, under the visitor’s program, the RTRA network Triangle de le Physiqueand a visiting research fellowship (VRF) from Queen’s University Belfast. This research used computational resources at the National Energy Research Scientific Computing Center in Oakland, CA, USA, the Kraken XT5 facility at the National Institute for Computational Science (NICS) in Knoxville, TN, USA and at the High Performance Computing Center Stuttgart (HLRS) of the University of Stuttgart, Stuttgart, Germany. The Kraken XT5 facility is a resource of the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number OCI-1053575. The Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, provided additional computational resources, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract No. DE-AC02-05CH11231.
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McLaughlin, B.M., Ballance, C.P., Pindzola, M.S., Müller, A. (2015). PAMOP: Petascale Atomic, Molecular and Optical Collision Calculations. In: Nagel, W., Kröner, D., Resch, M. (eds) High Performance Computing in Science and Engineering ‘14. Springer, Cham. https://doi.org/10.1007/978-3-319-10810-0_4
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