Tallents, Gregory John orcid.org/0000-0002-1409-105X, Aslanyan, Valentin and Aslanyan, A. G. (2017) Efficient calculation of degenerate atomic rates by numerical quadrature on GPUs. Computer Physics Communications. ISSN 0010-4655
Abstract
The rates of atomic processes in cold, dense plasmas are governed strongly by effects of quantum degeneracy. The electrons follow Fermi-Dirac statis- tics and their high density limits the number of quantum states available for occupation after a collision. These factors preclude a direct solution to the usual rate coefficient integrals. We summarise the formulation of this problem and present a simple, but efficient method of evaluating collisional rate coefficients via direct numerical integration. Numerical quadrature has an intrinsically high level of parallelism, ideally suited for graphics processor units. GPUs are particularly suited to this problem because of the large number of integrals which must be carried out simultaneously for a given atomic model. A CUDA code to calculate the rates of signicant atomic processes as part of a collisional-radiative model is presented and discussed. This approach may be readily extended to other applications where rapid and repeated evaluation of many integrals is required.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 16 Jun 2017 10:00 |
Last Modified: | 16 Oct 2024 13:50 |
Published Version: | https://doi.org/10.1016/j.cpc.2017.06.003 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1016/j.cpc.2017.06.003 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:117841 |