{"created":"2023-05-15T14:37:07.276389+00:00","id":47847,"links":{},"metadata":{"_buckets":{"deposit":"2be5dbec-04b3-4f17-84bb-e88d7e3e7369"},"_deposit":{"created_by":1,"id":"47847","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"47847"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00047847","sets":["1"]},"author_link":["480324","480322","480325","480326","480339","480341","480330","480338","480334","480335","480323","480329","480336","480319","480331","480321","480328","480337","480340","480327","480332","480318","480320","480333"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2016-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"87","bibliographicPageStart":"81","bibliographicVolumeNumber":"102","bibliographic_titles":[{"bibliographic_title":"Fusion Engineering and Design"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"量研機構では、JT-60SA で利用する中性粒子入射装置の実現に向けて、高出力長パルスの正イオン源を開発中であり、今回、JT-60SA の要求値を超える2MWの正イオンビームを100 秒間生成することに成功した。本実験は、日韓共同実験として韓国原子力研究院において実施した。その結果、ビームの生成時間が30 秒を超えると、イオンを生成するための放電ガス圧の変化がビーム電流値の時間的変化を引き起こすことが分かった。さらに、ビーム電流が変化するため、ビーム電流値とイオン源加速電極の電圧配分で決まるビームの収束性が時間とともに悪化していることが判明した。この収束性の悪化により、ビームの一部が加速電極に衝突し、電極の熱負荷が過大とな\nり、加速電極間で絶縁破壊が発生し、ビーム生成時間が制限されていることが初めて分かった。そこで、イオン源の動作ガス圧を制御してビーム電流の時間的変動を低減するとともに、加速電極電圧の配分を細かく調整することでビーム収束性の悪化を抑えて熱負荷を低く保ち、2MWのビームを100 秒間生成することに成功した。これらの長時間運転手法の開発と実証により、JT-60SA での100 秒運転に見通しがついた。","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.fusengdes.2015.11.033","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":"小島, 有志"}],"nameIdentifiers":[{"nameIdentifier":"480318","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"花田, 磨砂也"}],"nameIdentifiers":[{"nameIdentifier":"480319","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":".Jeong, 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high power positive ion beam with JT-60 positive ion source in Japan-Korea joint experiment"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:34:52.276156+00:00"}