{"created":"2023-05-15T14:39:47.767446+00:00","id":54634,"links":{},"metadata":{"_buckets":{"deposit":"2fedbf32-6bf9-411a-81d0-c86ee078f0d3"},"_deposit":{"created_by":1,"id":"54634","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"54634"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00054634","sets":["2"]},"author_link":["558274","558269","558254","558273","558253","558256","558258","558266","558272","558270","558267","558259","558260","558265","558264","558261","558252","558263","558257","558268","558255","558262","558271"],"item_10003_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2015-08","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{"bibliographic_title":"第12回日本加速器学会年会プロシーディングス"}]}]},"item_10003_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"放射線医学総合研究所では重粒子線回転ガントリーの建設が行われている[1]。これにより0-360 度の任意の方向から重粒子線が照射できるようになり、これまでの固定ポートによる照射に比べて高精度な治療が可能となる。重粒子線ガントリーは、陽子線に比べて磁気剛性が大きく磁石等が巨大になるため、2 極と4 極を独立に励磁できる機能結合型の超伝導電磁石を用いることで小型化が図られている。過去にも電磁石の測定データを発表してきておりビームが通過する有効磁場領域での積分磁場の均一度が0.2%であった[2]。本発表では10 台分の全電磁石の磁場測定が終了したためその結果についてまとめて報告する。また、ガントリーではレンジシフターを用いず、深部線量分布をビームエネルギーだけで調整する方式であるため、治療時間を従来と同等の時間内に収めるには、430-56 MeV/u の間を202 段、一段あたり数百 ms 程度で下げる必要がある。その際、超伝導磁石の交流損失によりクエンチしないこと、電流に対して磁場が追随するまでの時間、整定時間がその時間内に収まることが求められる。そのため高速励磁試験や磁場整定時間の測定を行った。","subitem_description_type":"Abstract"}]},"item_10003_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本加速器学会"}]},"item_10003_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"http://www.pasj.jp/web_publish/pasj2015/proceedings/PDF/THP0/THP077.pdf"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.pasj.jp/web_publish/pasj2015/proceedings/PDF/THP0/THP077.pdf","subitem_relation_type_select":"URI"}}]},"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":"松葉, 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