Pedestals and feedback in fusion-plasma relevant sandpile models
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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.author | Bowie, Craig | |
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dc.contributor.author | Hole, Matthew | |
dc.date.accessioned | 2021-04-28T23:19:01Z | |
dc.date.available | 2021-04-28T23:19:01Z | |
dc.identifier.citation | Physics of Plasmas 25, 012511 (2018); doi: 10.1063/1.4998793 | |
dc.identifier.issn | 1070-664X | |
dc.identifier.uri | http://hdl.handle.net/1885/231099 | |
dc.description.abstract | 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 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.sponsorship | This 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.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | American Institute of Physics (AIP) | |
dc.rights | © 2018 American Institute of Physics | |
dc.source | Physics of Plasmas | |
dc.title | Pedestals and feedback in fusion-plasma relevant sandpile models | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 25 | |
dcterms.dateAccepted | 2018-01-06 | |
dc.date.issued | 2018-01-23 | |
local.identifier.absfor | 020499 - Condensed Matter Physics not elsewhere classified | |
local.identifier.absfor | 020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges | |
local.identifier.ariespublication | a383154xPUB9341 | |
local.publisher.url | https://aip.scitation.org/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Bowie, Craig, College of Science, ANU | |
local.contributor.affiliation | Hole, Matthew, College of Science, ANU | |
dc.relation | http://purl.org/au-research/grants/arc/DP170102606 | |
local.bibliographicCitation.issue | 1 | |
local.bibliographicCitation.startpage | 1 | |
local.bibliographicCitation.lastpage | 10 | |
local.identifier.doi | 10.1063/1.4998793 | |
dc.date.updated | 2020-11-23T11:50:48Z | |
local.identifier.scopusID | 2-s2.0-85041216661 | |
dcterms.accessRights | Open Access | |
dc.provenance | https://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). | |
Collections | ANU Research Publications |
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