{"created":"2023-05-15T15:00:47.500746+00:00","id":82470,"links":{},"metadata":{"_buckets":{"deposit":"5b21c2d6-1f19-45f2-9912-dcc3efc372d1"},"_deposit":{"created_by":1,"id":"82470","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"82470"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00082470","sets":["1"]},"author_link":["1015453","1015469","1015451","1015473","1015466","1015458","1015456","1015459","1015474","1015457","1015455","1015452","1015460","1015465","1015464","1015454","1015475","1015463","1015468","1015461","1015462","1015470","1015472","1015471","1015467"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicPageStart":"065009","bibliographicVolumeNumber":"62","bibliographic_titles":[{"bibliographic_title":"Plasma Physics and Controlled Fusion"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Here, we report on a study of seed plasmas produced by non-resonant 2.45 GHz microwave heating in Heliotron J, which is useful for plasma start-up by neutral beam injection (NBI) under the conditions of low beam power (<1 MW), low accerelation voltage (<30 kV) and small device size (~1 m). The pre-ionization technique using the non-resonant heating produced the electron density in the order of 1017–1018 m−3 with the energy exceeds the CII ionization potential (30 eV). The existence of the relativistic electrons, which was essential to produce the seed plasmas, was confirmed experimentally during the pre-ionization phase by the synchrotron radiation and the hard x-ray emission measurements. The production mechanism of the relativistic electrons was considered to be stochastic interactions between the electrons and the microwave-frequency field. By optimizing the additional gas fueling during the microwave launch, a higher seed-plasma density more than 4 × 1018 m−3 was obtained, resulting that a rapid density evolution after NBI turn-on was successful even in the low NBI power (0.3 MW) condition. The seed plasmas produced by the pre-ionization method is useful to realize the plasma start-up under low absorption power condition in larger heliotron/stellarator devices such as perpendicular NBI in W7-X or deuterium NBI in LHD.","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOPscience"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/1361-6587/ab877e","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/ab877e","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":"Kobayashi, Shinji"}],"nameIdentifiers":[{"nameIdentifier":"1015451","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagasaki, Kazunobu"}],"nameIdentifiers":[{"nameIdentifier":"1015452","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Stange, T."}],"nameIdentifiers":[{"nameIdentifier":"1015453","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Mizuuchi, Tohru"}],"nameIdentifiers":[{"nameIdentifier":"1015454","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Okada, Horoyuki"}],"nameIdentifiers":[{"nameIdentifier":"1015455","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Minami, Takashi"}],"nameIdentifiers":[{"nameIdentifier":"1015456","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kado, Shinichiro"}],"nameIdentifiers":[{"nameIdentifier":"1015457","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Satoshi, Yamamoto"}],"nameIdentifiers":[{"nameIdentifier":"1015458","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ohshima, Shinsuke"}],"nameIdentifiers":[{"nameIdentifier":"1015459","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hada, K."}],"nameIdentifiers":[{"nameIdentifier":"1015460","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Weir, G.M."}],"nameIdentifiers":[{"nameIdentifier":"1015461","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Konoshima, Shigeru"}],"nameIdentifiers":[{"nameIdentifier":"1015462","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nakamura, Yuji"}],"nameIdentifiers":[{"nameIdentifier":"1015463","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kemmochi, Naoki"}],"nameIdentifiers":[{"nameIdentifier":"1015464","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshiaki, Ohtani"}],"nameIdentifiers":[{"nameIdentifier":"1015465","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Lu, X.X."}],"nameIdentifiers":[{"nameIdentifier":"1015466","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Panith, A."}],"nameIdentifiers":[{"nameIdentifier":"1015467","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Toi, Kazuo"}],"nameIdentifiers":[{"nameIdentifier":"1015468","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"SUZUKI, Yasuhiro"}],"nameIdentifiers":[{"nameIdentifier":"1015469","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagasaki, Kazunobu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015470","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Mizuuchi, Tohru","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015471","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Minami, Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015472","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kado, Shinichiro","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015473","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Satoshi, Yamamoto","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015474","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshiaki, Ohtani","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1015475","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":"Study of seed plasma generation for NBI plasma start-up using non-resonant microwave launch in Heliotron J","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Study of seed plasma generation for NBI plasma start-up using non-resonant microwave launch in Heliotron J"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-03-25"},"publish_date":"2021-03-25","publish_status":"0","recid":"82470","relation_version_is_last":true,"title":["Study of seed plasma generation for NBI plasma start-up using non-resonant microwave launch in Heliotron J"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T18:43:23.776002+00:00"}