A Linux cluster for between-pulse magnetic equilibrium reconstructions and other processor bound analyses

Q. Peng; R. J. Groebner; L. L. Lao; J. Schachter; D. P. Schissel; M. R. Wade

doi:10.1063/1.1384451

A Linux cluster for between-pulse magnetic equilibrium reconstructions and other processor bound analyses

Q. Peng, R. J. Groebner, L. L. Lao, J. Schachter, D. P. Schissel, M. R. Wade

Fusion and Fission Energy and Science Di

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

A 12-processor Linux PC cluster has been installed to perform between-pulse magnetic equilibrium reconstructions during tokamak operations using the EFIT code written in FORTRAN. The MPICH package implementing message passing interface is employed by EFIT for data distribution and communication. The new system calculates equilibria eight times faster than the previous system yielding a complete equilibrium time history on a 25 ms time scale 4 min after the pulse ends. A graphical interface is provided for users to control the time resolution and the type of EFITS. The next analysis to benefit from the cluster is CERQUICK written in IDL for ion temperature profile analysis. The plan is to expand the cluster so that a full profile analysis (Te, Ti, ne, Vr, Zeff) can be made available between pulses, which lays the ground work for Kinetic EFIT and/or ONETWO power balance analyses.

Original language	English
Pages (from-to)	3277-3280
Number of pages	4
Journal	Review of Scientific Instruments
Volume	72
Issue number	8
DOIs	https://doi.org/10.1063/1.1384451
State	Published - Aug 2001

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abstract = "A 12-processor Linux PC cluster has been installed to perform between-pulse magnetic equilibrium reconstructions during tokamak operations using the EFIT code written in FORTRAN. The MPICH package implementing message passing interface is employed by EFIT for data distribution and communication. The new system calculates equilibria eight times faster than the previous system yielding a complete equilibrium time history on a 25 ms time scale 4 min after the pulse ends. A graphical interface is provided for users to control the time resolution and the type of EFITS. The next analysis to benefit from the cluster is CERQUICK written in IDL for ion temperature profile analysis. The plan is to expand the cluster so that a full profile analysis (Te, Ti, ne, Vr, Zeff) can be made available between pulses, which lays the ground work for Kinetic EFIT and/or ONETWO power balance analyses.",

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AU - Schissel, D. P.

AU - Wade, M. R.

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A Linux cluster for between-pulse magnetic equilibrium reconstructions and other processor bound analyses

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