{"created":"2023-05-15T14:56:53.535654+00:00","id":77212,"links":{},"metadata":{"_buckets":{"deposit":"629688c3-6048-4353-877f-6d446e0932ae"},"_deposit":{"created_by":1,"id":"77212","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"77212"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00077212","sets":["1"]},"author_link":["998611","998620","998618","998612","998615","998619","998621","998625","998623","998617","998610","998614","998616","998622","998613","998624"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"11","bibliographicPageEnd":"115014-11","bibliographicPageStart":"115014-1","bibliographicVolumeNumber":"61","bibliographic_titles":[{"bibliographic_title":" Plasma Physics and Controlled Fusion"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We report the experimental finding of n = 1 helical cores (HCs) accompanied by saturated m/n = 2/1 tearing modes (TMs) with low mode frequencies in JT-60U. The HCs accompanied by TMs were observed after an increase in the mode amplitude and a decrease in the mode frequency of m/n = 2/1 precursors with tearing parity. The decreased mode frequency is typically lower than 20 Hz. With various diagnostics, the coupling of n = 1 HCs and m/n = 2/1 TMs has been clearly observed. Because the coherent oscillations in the ion temperature are observed in both the core region and the edge region, the flux surfaces including the m/n = 2/1 magnetic island appear to have m = 1 helical deformation. It has also been suggested that the m/n = 2/1 TM and the HC rotate in the electron diamagnetic direction keeping fm/n=1/1(HC) = 2fm/n=2/1(TM) in several plasmas. Here, fm/n=1/1(HC) is the mode frequency of HCs and fm/n=2/1(TM) is the mode frequency of TMs. In addition, the core seems to be shifted to the high-field side when the O-points of the m/n = 2/1 magnetic island line up in the midplane, which is confirmed by reconstructions of magnetohydrodynamic equilibria with motional Stark effect measurement and the MEUDAS code. Our observation of m/n = 2/1 TMs having HCs contributes to the understanding of the excitation mechanism of HCs in tokamak plasmas.","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOP Publishing"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/1361-6587/ab4612","subitem_relation_type_select":"DOI"}}]},"item_8_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://iopscience.iop.org/article/10.1088/1361-6587/ab4612/meta","subitem_relation_type_select":"URI"}}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0741-3335","subitem_source_identifier_type":"ISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"坂東, 隆宏"}],"nameIdentifiers":[{"nameIdentifier":"998610","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松永, 剛"}],"nameIdentifiers":[{"nameIdentifier":"998611","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"武智, 学"}],"nameIdentifiers":[{"nameIdentifier":"998612","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"諫山, 明彦"}],"nameIdentifiers":[{"nameIdentifier":"998613","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"大山, 直幸"}],"nameIdentifiers":[{"nameIdentifier":"998614","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"井上, 静雄"}],"nameIdentifiers":[{"nameIdentifier":"998615","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"吉田, 麻衣子"}],"nameIdentifiers":[{"nameIdentifier":"998616","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"若月, 琢馬"}],"nameIdentifiers":[{"nameIdentifier":"998617","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takahiro, Bando","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998618","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Go, Matsunaga","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998619","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Manabu, Takechi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998620","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Akihiko, Isayama","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998621","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Naoyuki, Oyama","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998622","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shizuo, Inoue","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998623","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Maiko, Yoshida","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998624","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takuma, Wakatsuki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"998625","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Experimental observations of an n = 1 helical core accompanied by a saturated m/n = 2/1 tearing mode with low mode frequencies in JT-60U","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Experimental observations of an n = 1 helical core accompanied by a saturated m/n = 2/1 tearing mode with low mode frequencies in JT-60U"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-10-25"},"publish_date":"2019-10-25","publish_status":"0","recid":"77212","relation_version_is_last":true,"title":["Experimental observations of an n = 1 helical core accompanied by a saturated m/n = 2/1 tearing mode with low mode frequencies in JT-60U"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:48:14.253408+00:00"}