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Parallelized simulation code for multiconjugate adaptive optics

Ahmadia, A. J. and Ellerbroek, B. L. (2003) Parallelized simulation code for multiconjugate adaptive optics. In: Astronomical Adaptive Optics Systems and Applications. Proceedings of SPIE. No.5169. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 218-227. ISBN 9780819450425.

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Advances in adaptive optics (AO) systems are necessary to achieve optical performance that is suitable for future extremely large telescopes (ELTs). Accurate simulation of system performance during the design process is essential. We detail the current implementation and near-term development plans for a coarse-grain parallel code for simulations of multiconjugate adaptive optics (MCAO). Included is a summary of the simulation’s computationally intensive mathematical subroutines and the associated scaling laws that quantify the size of the computational burden as a function of the simulation parameters. The current state of three different approaches to parallelizing the original serial code is outlined, and the timing results of all three approaches are demonstrated. The first approach, coarse-grained parallelization of the atmospheric propagations, divides the tasks of propagating wavefronts through the atmosphere among a group of processors. The second method of parallelization, fine-grained parallelization of the individual wavefront propagations, is then introduced. Finally, a technique for computing the wavefront reconstructions is analyzed. A parallel version of the block-symmetric Gauss-Seidel smoother, used in the conjugate-gradients reconstructor with multigrid-solver preconditioning, has been implemented. The timing results demonstrate that this is currently the fastest known full-featured, operational multiconjugate adaptive optics simulation.

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Additional Information:© 2003 Society of Photo-optical Instrumentation Engineers (SPIE). The New Initiatives Office is a partnership between two divisions of the Association of Universities for Research in Astronomy (AURA), Inc.: The National Optical Astronomy Observatory (NOAO) and the Gemini Observatory. NOAO is operated by AURA under a cooperative agreement with the National Science Foundation (NSF). The Gemini Observatory is operated by AURA under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Particle Physics and Astronomy Research Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), CNPq (Brazil), and CONICET (Argentina).
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Australian Research CouncilUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)UNSPECIFIED
Subject Keywords:Adaptive optics, propagation simulations, parallel computing, Beowulf cluster
Series Name:Proceedings of SPIE
Issue or Number:5169
Record Number:CaltechAUTHORS:20181112-084608142
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Official Citation:Aron J. Ahmadia, Brent L. Ellerbroek, } "Parallelized simulation code for multiconjugate adaptive optics", Proc. SPIE 5169, Astronomical Adaptive Optics Systems and Applications, (24 December 2003); doi: 10.1117/12.506553;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90830
Deposited By: Tony Diaz
Deposited On:13 Nov 2018 19:17
Last Modified:16 Nov 2021 03:35

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