{"created":"2023-05-15T14:37:56.965845+00:00","id":48950,"links":{},"metadata":{"_buckets":{"deposit":"7d1c6d3a-17b5-4784-9219-0099cbd20340"},"_deposit":{"created_by":1,"id":"48950","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"48950"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00048950","sets":["1"]},"author_link":["493346","493350","493344","493347","493339","493342","493353","493341","493345","493352","493351","493340","493343","493354","493348","493349"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017-06","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicPageEnd":"062513-10","bibliographicPageStart":"062513-1","bibliographicVolumeNumber":"24","bibliographic_titles":[{"bibliographic_title":"Physics of Plasmas"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In tokamak operations, breakdown of plasma is the first step of the plasma build-up. In this paper, we present a combinative investigation of radio frequency (RF)-induced breakdown experiments in QUEST (Q-shu University Experiment with Steady-State Spherical Tokamak) and a one-point model of hydrogen ionization. Experimental results with two different frequencies of 2.45 GHz and 8.2 GHz showed that the clear threshold on connection length, L , existed for breakdown with a negative n- index configuration n =(dR/dBv)/(dBv/dR) , where R is the major radius and Bv the is vertical magnetic field. In contrast, breakdown was always obtained with positive n -index when changing L. It indicates that a lifetime of an incubated electron plays a significant role in the plasma breakdown. According to one-point model calculation, the experimental threshold of L is well predicted by the lifetime of the incubated electron estimated by employing the loss term along with L . The model calculation also describes the requirement of the minimum electron temperature Te for RF-induced breakdown to realize an avalanche of electrons in the tokamak magnetic structure.","subitem_description_type":"Abstract"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1063/1.4985142","subitem_relation_type_select":"DOI"}}]},"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":"Yoneda, R."}],"nameIdentifiers":[{"nameIdentifier":"493339","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hanada, K."}],"nameIdentifiers":[{"nameIdentifier":"493340","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nakamura, K."}],"nameIdentifiers":[{"nameIdentifier":"493341","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Idei, H."}],"nameIdentifiers":[{"nameIdentifier":"493342","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshida, N."}],"nameIdentifiers":[{"nameIdentifier":"493343","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hasegawa, M."}],"nameIdentifiers":[{"nameIdentifier":"493344","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Onchi, T."}],"nameIdentifiers":[{"nameIdentifier":"493345","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kuroda, K."}],"nameIdentifiers":[{"nameIdentifier":"493346","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kawasaki, S."}],"nameIdentifiers":[{"nameIdentifier":"493347","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Higashijima, A."}],"nameIdentifiers":[{"nameIdentifier":"493348","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagata, T."}],"nameIdentifiers":[{"nameIdentifier":"493349","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Isayama, A."}],"nameIdentifiers":[{"nameIdentifier":"493350","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Mitarai, O."}],"nameIdentifiers":[{"nameIdentifier":"493351","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Fukuyama, A."}],"nameIdentifiers":[{"nameIdentifier":"493352","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Y.Takase"}],"nameIdentifiers":[{"nameIdentifier":"493353","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"諫山 明彦","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"493354","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"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":"Effect of magnetic structure on RF-induced breakdown in QUEST","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Effect of magnetic structure on RF-induced breakdown in QUEST"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-05-11"},"publish_date":"2018-05-11","publish_status":"0","recid":"48950","relation_version_is_last":true,"title":["Effect of magnetic structure on RF-induced breakdown in QUEST"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:22:33.178351+00:00"}