{"created":"2023-05-15T14:36:48.846637+00:00","id":47429,"links":{},"metadata":{"_buckets":{"deposit":"8e5a62f3-8485-4bca-a665-8d3e60835ecb"},"_deposit":{"created_by":1,"id":"47429","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"47429"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00047429","sets":["1"]},"author_link":["475041","475038","475046","475047","475037","475045","475042","475039","475043","475044","475040"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2016-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"72","bibliographicPageStart":"68","bibliographicVolumeNumber":"812","bibliographic_titles":[{"bibliographic_title":"Nuclear Instruments and Methods in Physics Research A"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In a conventional carbon-ion radiotherapy facility, a carbon-ion beam is typically accelerated up to an optimum energy, slowly extracted from a synchrotron ring by a resonant slow extraction method, and ultimately delivered to a patient through a beam-delivery system. At Japan’s Gunma University, a method employing slow-beam extraction along with beam-acceleration has been adopted. This method slightly alters the extracted-beam’s energy owing to the acceleration component of the process, which subsequently results in a residual-range variation of approximately 2 mm in water-equivalent length. However, this range variation does not disturb a distal dose distribution with broad-beam methods such as the single beam-wobbling method. With the pencil-beam 3D scanning method, however, such a range variation disturbs a distal dose distribution because the variation is comparable to slice thickness. Therefore, for pencil-beam 3D scanning, an energy compensation method for a slow extracted beam is proposed in this paper. This method can compensate for the aforementioned energy variances by controlling net energy losses through a rotatable energy absorber set fixed between the synchrotron exit channel and the isocenter. Experimental results demonstrate that beam energies can be maintained constant, as originally hypothesized. Moreover, energy-absorber positions were found to be significantly enhanced by optimizing beam optics for reducing beam-size growth by implementation of the multiple-scattering effect option.","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":"doi:10.1016/j.nima.2015.12.044","subitem_relation_type_select":"DOI"}}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0168-9002","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":"Fujimoto, Tetsuya"}],"nameIdentifiers":[{"nameIdentifier":"475037","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Souda, Hikaru"}],"nameIdentifiers":[{"nameIdentifier":"475038","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Torikoshi, Masami"}],"nameIdentifiers":[{"nameIdentifier":"475039","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kanai, Tatsuaki"}],"nameIdentifiers":[{"nameIdentifier":"475040","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamada, Satoru"}],"nameIdentifiers":[{"nameIdentifier":"475041","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Noda, Koji"}],"nameIdentifiers":[{"nameIdentifier":"475042","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"想田 光","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"475043","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"取越 正己","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"475044","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"金井 達明","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"475045","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山田 聰","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"475046","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"野田 耕司","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"475047","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":"Energy compensation of slow extracted beams with RF acceleration","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Energy compensation of slow extracted beams with RF acceleration"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2016-05-19"},"publish_date":"2016-05-19","publish_status":"0","recid":"47429","relation_version_is_last":true,"title":["Energy compensation of slow extracted beams with RF acceleration"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:39:57.128818+00:00"}