{"id":"https://openalex.org/W2116310441","doi":"https://doi.org/10.1109/cca.2009.5281183","title":"Closed-loop direct parametric identification of magnetohydrodynamic normal modes spectra in EXTRAP-T2R reversed-field pinch","display_name":"Closed-loop direct parametric identification of magnetohydrodynamic normal modes spectra in EXTRAP-T2R reversed-field pinch","publication_year":2009,"publication_date":"2009-07-01","ids":{"openalex":"https://openalex.org/W2116310441","doi":"https://doi.org/10.1109/cca.2009.5281183","mag":"2116310441"},"language":"en","primary_location":{"id":"doi:10.1109/cca.2009.5281183","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cca.2009.5281183","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5005752240","display_name":"Erik Olofsson","orcid":"https://orcid.org/0000-0001-9019-212X"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Erik Olofsson","raw_affiliation_strings":["KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden"],"affiliations":[{"raw_affiliation_string":"KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105401120","display_name":"Pier Brunsell","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Per Brunsell","raw_affiliation_strings":["KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden"],"affiliations":[{"raw_affiliation_string":"KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5106267257","display_name":"J. R. Drake","orcid":"https://orcid.org/0000-0003-4423-4143"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"James Drake","raw_affiliation_strings":["KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden"],"affiliations":[{"raw_affiliation_string":"KTH/EES Fusion Plasma Physics (Association EURATOM-VR), Stockholm, Sweden","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5005752240"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":3.1176,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.92658279,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"1449","last_page":"1454"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10346","display_name":"Magnetic confinement fusion research","score":1.0,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10346","display_name":"Magnetic confinement fusion research","score":1.0,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10384","display_name":"Laser-Plasma Interactions and Diagnostics","score":0.9983999729156494,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","score":0.9955000281333923,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/reversed-field-pinch","display_name":"Reversed field pinch","score":0.9113192558288574},{"id":"https://openalex.org/keywords/magnetohydrodynamics","display_name":"Magnetohydrodynamics","score":0.8033566474914551},{"id":"https://openalex.org/keywords/magnetohydrodynamic-drive","display_name":"Magnetohydrodynamic drive","score":0.7187706232070923},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.6741878986358643},{"id":"https://openalex.org/keywords/tokamak","display_name":"Tokamak","score":0.6148437261581421},{"id":"https://openalex.org/keywords/pinch","display_name":"Pinch","score":0.4808838665485382},{"id":"https://openalex.org/keywords/instability","display_name":"Instability","score":0.44449931383132935},{"id":"https://openalex.org/keywords/plasma","display_name":"Plasma","score":0.44176921248435974},{"id":"https://openalex.org/keywords/computational-physics","display_name":"Computational physics","score":0.390340119600296},{"id":"https://openalex.org/keywords/mechanics","display_name":"Mechanics","score":0.38531503081321716},{"id":"https://openalex.org/keywords/nuclear-physics","display_name":"Nuclear physics","score":0.07737016677856445}],"concepts":[{"id":"https://openalex.org/C36704743","wikidata":"https://www.wikidata.org/wiki/Q631289","display_name":"Reversed field pinch","level":4,"score":0.9113192558288574},{"id":"https://openalex.org/C31532427","wikidata":"https://www.wikidata.org/wiki/Q2549249","display_name":"Magnetohydrodynamics","level":3,"score":0.8033566474914551},{"id":"https://openalex.org/C42471609","wikidata":"https://www.wikidata.org/wiki/Q1779048","display_name":"Magnetohydrodynamic drive","level":4,"score":0.7187706232070923},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.6741878986358643},{"id":"https://openalex.org/C116515362","wikidata":"https://www.wikidata.org/wiki/Q188589","display_name":"Tokamak","level":3,"score":0.6148437261581421},{"id":"https://openalex.org/C14480152","wikidata":"https://www.wikidata.org/wiki/Q944644","display_name":"Pinch","level":2,"score":0.4808838665485382},{"id":"https://openalex.org/C207821765","wikidata":"https://www.wikidata.org/wiki/Q405372","display_name":"Instability","level":2,"score":0.44449931383132935},{"id":"https://openalex.org/C82706917","wikidata":"https://www.wikidata.org/wiki/Q10251","display_name":"Plasma","level":2,"score":0.44176921248435974},{"id":"https://openalex.org/C30475298","wikidata":"https://www.wikidata.org/wiki/Q909554","display_name":"Computational physics","level":1,"score":0.390340119600296},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.38531503081321716},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.07737016677856445}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/cca.2009.5281183","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cca.2009.5281183","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":0.5199999809265137}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W103156936","https://openalex.org/W1586251222","https://openalex.org/W1968251177","https://openalex.org/W1990426504","https://openalex.org/W1993592171","https://openalex.org/W1998440482","https://openalex.org/W2026777767","https://openalex.org/W2033549247","https://openalex.org/W2034553374","https://openalex.org/W2063004237","https://openalex.org/W2066833397","https://openalex.org/W2075132538","https://openalex.org/W2075432292","https://openalex.org/W2091981177","https://openalex.org/W2093012325","https://openalex.org/W2115968007","https://openalex.org/W2117871615","https://openalex.org/W2123440765","https://openalex.org/W2169527426","https://openalex.org/W2551772920","https://openalex.org/W4206245107","https://openalex.org/W4236076921","https://openalex.org/W4236755946","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W2049123749","https://openalex.org/W2072075229","https://openalex.org/W2386528229","https://openalex.org/W1482473826","https://openalex.org/W2028882311","https://openalex.org/W1973727899","https://openalex.org/W2096223544","https://openalex.org/W1972896322","https://openalex.org/W2914179537","https://openalex.org/W2031269569"],"abstract_inverted_index":{"The":[0,47],"reversed-field":[1],"pinch":[2],"(RFP)":[3],"EXTRAP-T2R":[4],"(T2R)":[5],"is":[6,21,50,91],"a":[7,38,42],"plasma":[8,150],"physics":[9],"experiment":[10],"with":[11],"particular":[12],"relevance":[13],"for":[14,25],"magnetic":[15],"confinement":[16],"fusion":[17],"(MCF)":[18],"research.":[19],"T2R":[20,69,144],"very":[22],"well":[23],"equipped":[24],"investigations":[26],"of":[27,53,72],"magnetohydrodynamic":[28],"(MHD)":[29],"instabilities":[30],"known":[31],"as":[32],"resistive-wall":[33],"modes":[34,89,124],"(RWMs),":[35],"growing":[36],"on":[37,80,117],"time-scale":[39],"set":[40],"by":[41,98,113],"surrounding":[43],"non-perfectly":[44],"conducting":[45],"shell.":[46,82],"RWM":[48],"instability":[49],"also":[51],"subject":[52],"intense":[54],"research":[55],"in":[56,68,93,105],"tokamak":[57],"experiments":[58],"(another":[59],"MCF":[60],"configuration).":[61],"Recently,":[62],"multiple":[63],"RWMs":[64],"have":[65],"been":[66],"stabilized":[67],"using":[70],"arrays":[71],"active":[73],"(current-carrying)":[74],"and":[75,100,125,132,152],"sensor":[76],"(voltage-measuring)":[77],"coils":[78],"equidistributed":[79],"the":[81,86,94,103,106,126],"In":[83],"this":[84],"paper,":[85],"MHD":[87,137],"normal":[88],"dynamics":[90],"probed":[92],"required":[95],"feedback":[96],"operation":[97],"simultaneously,":[99],"pseudo-randomly,":[101],"exciting":[102],"spectrum":[104],"spatial":[107],"sense.":[108],"Spectra":[109],"are":[110,130],"then":[111],"extracted":[112],"predictionerror":[114],"minimization":[115],"based":[116],"an":[118],"observer":[119],"that":[120],"tracks":[121],"dynamically":[122],"aliased":[123],"results":[127],"thus":[128],"obtained":[129],"related,":[131],"compared,":[133],"to":[134,149],"established":[135],"linear":[136],"stability":[138],"theory.":[139],"This":[140],"pioneer":[141],"study":[142],"at":[143],"is,":[145],"arguably,":[146],"appealling":[147],"both":[148],"physicists":[151],"automatic":[153],"control":[154],"staff.":[155]},"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-03-25T13:04:00.132906","created_date":"2025-10-10T00:00:00"}