{"created":"2023-05-15T14:58:12.016784+00:00","id":78941,"links":{},"metadata":{"_buckets":{"deposit":"53fe9188-0dc2-4fb6-b24a-013ada97c81f"},"_deposit":{"created_by":1,"id":"78941","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"78941"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00078941","sets":["1"]},"author_link":["999197","999184","999195","999198","999183","999186","999191","999193","999192","999182","999189","999196","999194","999188","999185","999187","999190"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-02","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"023502","bibliographicVolumeNumber":"91","bibliographic_titles":[{"bibliographic_title":"Review of Scientific Instruments"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Long pulse negative ion beams of 500 keV and 154 A/m2 for 118 s have been achieved for the first time, which exceeds the requirement of the JT-60SA negative ion source. In order to solve the issues of such long pulse beams, the fast cutoff system of the power supply aims to reduce the surge current and to extend the lifetime of filaments and the suppression method of excess cesium (Cs) accumulation on the plasma grid\n(PG) to achieve stable negative ion production. By developing the fast cutoff system using a field programmable gate array unit for the arc\npower supply, the cutoff time has been reduced to 1/10 that of the original system and the lifetime of the filament was extended by three times.\nIn order to achieve stable negative ion production, incoming Cs on the PG surface has been reduced by keeping the chamber wall temperature\nbelow 40 ○C. As a result, a stable beam current drift of <6% has been achieved for the 118 s duration.","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"AIP Publishing"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1063/1.5130436","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://aip.scitation.org/doi/10.1063/1.5130436","subitem_relation_type_select":"URI"}}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0034-6748","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":"Ichikawa, Masahiro"}],"nameIdentifiers":[{"nameIdentifier":"999182","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kojima, Atsushi"}],"nameIdentifiers":[{"nameIdentifier":"999183","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hiratsuka, Junichi"}],"nameIdentifiers":[{"nameIdentifier":"999184","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshida, Masafumi"}],"nameIdentifiers":[{"nameIdentifier":"999185","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Umeda, Naotaka"}],"nameIdentifiers":[{"nameIdentifier":"999186","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"mae quinones Saquilayan, Glynnis"}],"nameIdentifiers":[{"nameIdentifier":"999187","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Watanabe, Kazuhiro"}],"nameIdentifiers":[{"nameIdentifier":"999188","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tobari, Hiroyuki"}],"nameIdentifiers":[{"nameIdentifier":"999189","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kashiwagi, Mieko"}],"nameIdentifiers":[{"nameIdentifier":"999190","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Masahiro, Ichikawa","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999191","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Atsushi, Kojima","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999192","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Junichi, Hiratsuka","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999193","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Naotaka, Umeda","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999194","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"mae quinones Saquilayan, Glynnis","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999195","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kazuhiro, Watanabe","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999196","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hiroyuki, Tobari","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999197","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Mieko, Kashiwagi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"999198","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":"Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-02-10"},"publish_date":"2020-02-10","publish_status":"0","recid":"78941","relation_version_is_last":true,"title":["Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:46:05.132858+00:00"}