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dc.date.accessioned2017-05-24T12:54:50Z
dc.date.available2017-05-24T12:54:50Z
dc.date.created2016-07-27T14:17:10Z
dc.date.issued2016
dc.identifier.citationGarcia, Odd Erik Kube, Ralph Theodorsen, Audun Pecseli, Hans . Stochastic modelling of intermittent fluctuations in the scrape-off layer: Correlations, distributions, level crossings, and moment estimation. Physics of Plasmas. 2016, 23(5), 1-14
dc.identifier.urihttp://hdl.handle.net/10852/55494
dc.description.abstractA stochastic model is presented for intermittent fluctuations in the scrape-off layer of magnetically confined plasmas. The fluctuations in the plasma density are modeled by a super-position of uncorrelated pulses with fixed shape and duration, describing radial motion of blob-like structures. In the case of an exponential pulse shape and exponentially distributed pulse amplitudes, predictions are given for the lowest order moments, probability density function, auto-correlation function, level crossings, and average times for periods spent above and below a given threshold level. Also, the mean squared errors on estimators of sample mean and variance for realizations of the process by finite time series are obtained. These results are discussed in the context of single-point measurements of fluctuations in the scrape-off layer, broad density profiles, and implications for plasma–wall interactions due to the transient transport events in fusion grade plasmas. The results may also have wide applications for modelling fluctuations in other magnetized plasmas such as basic laboratory experiments and ionospheric irregularities. This research was first published in Physics of Plasmas. © AIP Publishing.en_US
dc.languageEN
dc.publisherAmerican Institute of Physics (AIP)
dc.titleStochastic modelling of intermittent fluctuations in the scrape-off layer: Correlations, distributions, level crossings, and moment estimationen_US
dc.typeJournal articleen_US
dc.creator.authorGarcia, Odd Erik
dc.creator.authorKube, Ralph
dc.creator.authorTheodorsen, Audun
dc.creator.authorPecseli, Hans
cristin.unitcode185,15,4,70
cristin.unitnamePlasma- og romfysikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1369460
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physics of Plasmas&rft.volume=23&rft.spage=1&rft.date=2016
dc.identifier.jtitlePhysics of Plasmas
dc.identifier.volume23
dc.identifier.issue5
dc.identifier.startpage1
dc.identifier.endpage14
dc.identifier.doihttp://dx.doi.org/10.1063/1.4951016
dc.identifier.urnURN:NBN:no-58280
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1070-664X
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/55494/1/garcia_php_23_052308.pdf
dc.type.versionPublishedVersion


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