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Pedestals and feedback in fusion-plasma relevant sandpile models

Bowie, Craig; Hole, Matthew

Description

We present modifications to the sandpile model [Chapman, Phys. Rev. E 62, 1905 (2000)] (Classic Model). A feedback loop is added to the Classic Model, elements of which may have relevance to the behaviour of a fusion plasma. Those elements include variation of the total energy of the system in proportion to a proxy for the Larmor radius, ρ, and resulting variations in mass loss event (MLE) size and waiting times between MLEs. We also show other variants of the Classic Model which produce...[Show more]

dc.contributor.authorBowie, Craig
dc.contributor.authorHole, Matthew
dc.date.accessioned2021-04-28T23:19:01Z
dc.date.available2021-04-28T23:19:01Z
dc.identifier.citationPhysics of Plasmas 25, 012511 (2018); doi: 10.1063/1.4998793
dc.identifier.issn1070-664X
dc.identifier.urihttp://hdl.handle.net/1885/231099
dc.description.abstractWe present modifications to the sandpile model [Chapman, Phys. Rev. E 62, 1905 (2000)] (Classic Model). A feedback loop is added to the Classic Model, elements of which may have relevance to the behaviour of a fusion plasma. Those elements include variation of the total energy of the system in proportion to a proxy for the Larmor radius, ρ, and resulting variations in mass loss event (MLE) size and waiting times between MLEs. We also show other variants of the Classic Model which produce pedestals, without introducing feedback. The modifications produce a pedestal similar to that seen in a fusion plasma, as well as feedback effects. We observe that maximum MLE sizes, and maximum waiting times between MLEs, grow with pedestal size only in the presence of feedback. If, as we purport, the edge localised mode (ELM) process is captured by an MLE model with feedback, then a conclusion is that ELMs can be reduced if feedback effects are reduced.
dc.description.sponsorshipThis work was jointly funded by the Australian Research Council through Grant DP170102606 and the Australian National University. One of the authors, C. A. Bowie, was supported through an ANU Ph.D. scholarship, an Australian Government Research Training Program (RTP) Scholarship, and an Australian Institute of Nuclear Science and Engineering Postgraduate Research Award.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Institute of Physics (AIP)
dc.rights© 2018 American Institute of Physics
dc.sourcePhysics of Plasmas
dc.titlePedestals and feedback in fusion-plasma relevant sandpile models
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume25
dcterms.dateAccepted2018-01-06
dc.date.issued2018-01-23
local.identifier.absfor020499 - Condensed Matter Physics not elsewhere classified
local.identifier.absfor020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges
local.identifier.ariespublicationa383154xPUB9341
local.publisher.urlhttps://aip.scitation.org/
local.type.statusPublished Version
local.contributor.affiliationBowie, Craig, College of Science, ANU
local.contributor.affiliationHole, Matthew, College of Science, ANU
dc.relationhttp://purl.org/au-research/grants/arc/DP170102606
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage10
local.identifier.doi10.1063/1.4998793
dc.date.updated2020-11-23T11:50:48Z
local.identifier.scopusID2-s2.0-85041216661
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/9873..."Published version can be made open access on institutional repository after 12 month embargo" from SHERPA/RoMEO site (as at 29.4.2021).
CollectionsANU Research Publications

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