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Detection of Causal...
Detection of Causal Relations in Time Series Affected by Noise in Tokamaks Using Geodesic Distance on Gaussian Manifolds
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- Murari, Andrea (author)
- Culham Sci Ctr, EUROfus Consortium, JET, Abingdon OX14 3DB, Oxon, England.;Univ Padua, Consorzio RFX, Acciaierie Venete SpA, CNR,ENEA,INFN, I-35127 Padua, Italy.;Culham Sci Ctr, JET, EUROfus Programme Management Unit, Abingdon OX14 3DB, Oxon, England.
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- Bergsåker, Henric (author)
- KTH,Fusionsplasmafysik
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- Bykov, Igor (author)
- KTH,Fusionsplasmafysik
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- Frassinetti, Lorenzo (author)
- KTH,Fusionsplasmafysik
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- Garcia-Carrasco, Alvaro (author)
- KTH,Fusionsplasmafysik
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- Hellsten, Torbjörn (author)
- KTH,Fusionsplasmafysik
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- Johnson, Thomas (author)
- KTH,Fusionsplasmafysik
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- Menmuir, Sheena (author)
- KTH,Fusionsplasmafysik
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- Petersson, Per (author)
- KTH,Fusionsplasmafysik
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- Rachlew, Elisabeth, 1944- (author)
- KTH,Fysik
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- Ratynskaia, Svetlana (author)
- KTH,Rymd- och plasmafysik
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- Rubel, Marek (author)
- KTH,Fusionsplasmafysik
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- Stefanikova, Estera (author)
- KTH,Fusionsplasmafysik
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- Ström, Petter (author)
- KTH,Fusionsplasmafysik
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- Tholerus, Emmi (author)
- KTH,Fusionsplasmafysik
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- Tolias, Panagiotis (author)
- KTH,Rymd- och plasmafysik
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- Olivares, Pablo Vallejos (author)
- KTH,Fusionsplasmafysik
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- Weckmann, Armin (author)
- KTH,Fusionsplasmafysik
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- Zhou, Yushun (author)
- KTH,Fusionsplasmafysik,Fusion Plasma Phys, EES, SE-10044 Stockholm, Sweden.
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- Zychor, I. (author)
- Natl Ctr Nucl Res, PL-05400 Otwock, Poland.
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- Andersson Sundén, Erik (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Binda, Federico, 1987- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Cecconello, Marco (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Conroy, Sean (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Dzysiuk, Nataliia (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Ericsson, Göran (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Eriksson, Jacob, Dr, 1985- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Hellesen, Carl, 1980- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Hjalmarsson, Anders (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Possnert, Göran, 1951- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Sjöstrand, Henrik, 1978- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Skiba, Mateusz, 1985- (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Weiszflog, Matthias (author)
- Uppsala universitet,Tillämpad kärnfysik
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Culham Sci Ctr, EUROfus Consortium, JET, Abingdon OX14 3DB, Oxon, England;Univ Padua, Consorzio RFX, Acciaierie Venete SpA, CNR,ENEA,INFN, I-35127 Padua, Italy.;Culham Sci Ctr, JET, EUROfus Programme Management Unit, Abingdon OX14 3DB, Oxon, England. Fusionsplasmafysik (creator_code:org_t)
- 2017-10-24
- 2017
- English.
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In: Entropy. - : MDPI. - 1099-4300. ; 19:10
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https://doi.org/10.3...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
Close
- Modern experiments in Magnetic Confinement Nuclear Fusion can produce Gigabytes of data, mainly in form of time series. The acquired signals, composing massive databases, are typically affected by significant levels of noise. The interpretation of the time series can therefore become quite involved, particularly when tenuous causal relations have to be investigated. In the last years, synchronization experiments, to control potentially dangerous instabilities, have become a subject of intensive research. Their interpretation requires quite delicate causality analysis. In this paper, the approach of Information Geometry is applied to the problem of assessing the effectiveness of synchronization experiments on JET (Joint European Torus). In particular, the use of the Geodesic Distance on Gaussian Manifolds is shown to improve the results of advanced techniques such as Recurrent Plots and Complex Networks, when the noise level is not negligible. In cases affected by particularly high levels of noise, compromising the traditional treatments, the use of the Geodesic Distance on Gaussian Manifolds allows deriving quite encouraging results. In addition to consolidating conclusions previously quite uncertain, it has been demonstrated that the proposed approach permit to successfully analyze signals of discharges which were otherwise unusable, therefore salvaging the interpretation of those experiments.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- information geometry
- Geodesic Distance on Gaussian Manifolds
- recurrence plots
- complex networks
- ELMs
- sawteeth
- pacing experiments
- Tokamaks
- entropy
Publication and Content Type
- ref (subject category)
- art (subject category)
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Entropy
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- By the author/editor
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Murari, Andrea
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Bergsåker, Henri ...
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Bykov, Igor
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Frassinetti, Lor ...
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Garcia-Carrasco, ...
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Hellsten, Torbjö ...
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show more...
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Johnson, Thomas
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Menmuir, Sheena
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Petersson, Per
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Rachlew, Elisabe ...
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Ratynskaia, Svet ...
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Rubel, Marek
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Stefanikova, Est ...
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Ström, Petter
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Tholerus, Emmi
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Tolias, Panagiot ...
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Olivares, Pablo ...
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Weckmann, Armin
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Zhou, Yushun
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Zychor, I.
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Andersson Sundén ...
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Binda, Federico, ...
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Cecconello, Marc ...
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Conroy, Sean
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Dzysiuk, Natalii ...
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Ericsson, Göran
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Eriksson, Jacob, ...
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Hellesen, Carl, ...
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Hjalmarsson, And ...
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Possnert, Göran, ...
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Sjöstrand, Henri ...
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Skiba, Mateusz, ...
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Weiszflog, Matth ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
- Articles in the publication
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Entropy
- By the university
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Royal Institute of Technology
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Uppsala University