{"created":"2023-06-20T14:35:53.366307+00:00","id":2171,"links":{},"metadata":{"_buckets":{"deposit":"e7be65f3-5cd6-4f8f-ba48-ce5a166b1a68"},"_deposit":{"created_by":1,"id":"2171","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2171"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00002171","sets":["1398:1408:1417","1887:1893","9:10:147:191"]},"author_link":["4012","4006","4014","4002","4011","4016","4017","4013","4009","4019","4003","4001","4005","4010","4018","4008","4004","4015","4000","4007"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"BESS-Polar: Sensitive search for primordial antiparticle using a superconducting spectrometer with long duration balloon flights in Antarctica"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2008-02-29","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"96","bibliographicPageStart":"81","bibliographicVolumeNumber":"JAXA-RR-07-009","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構研究開発報告: 大気球研究報告"},{"bibliographic_title":"JAXA Research and Development Report: Research Reports on High Altitude Balloons","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"本研究は、南極周回超伝導スペクトロメータによる宇宙線観測(BESS(Balloon-borne Experiment with a Superconducting Spectrometer)-Polar実験)を通して、「宇宙起源反粒子、反物質の精密探査」を目的としている。地球磁極領域に降り注ぐ低エネルギー宇宙線に注目し、反陽子スペクトルを精密に測定して、衝突(2次)起源反陽子流束の理解を深めるとともに、「原始ブラックホール(PBH: Primordial Black Hole)の蒸発」、「超対称性粒子・ニュートラリーノの対消滅」など、初期宇宙における素粒子現象の痕跡となる「宇宙(1次)起源反粒子」を精密探査する。反ヘリウムの直接探査を通して、宇宙における物質・反物質の存在の非対称性を検証する。同時に陽子、ヘリウム流束を精密に観測し、これまでのカナダでの観測(BESS実験、1993-2002)の結果と合わせて、太陽活動変調とその電荷依存性について系統的に観測し、宇宙線の伝播、相互作用に関する基礎データを提供する。本研究では、これまでのBESS実験で培われた超伝導スペクトロメータによる宇宙線観測の経験をもとに、低エネルギー領域での観測感度を高め、南極周回長時間飛翔を可能とする超伝導スペクトロメータを新たに開発した。2004年12月13日、南極(米国、マクマード基地)での観測気球打ち上げ、高度37kmでの9日間に及ぶ南極周回飛翔に成功し、9億イベントの宇宙線観測データを収集した。運動エネルギー0.1〜1.3GeVの範囲に於いて、これまでの約4倍の統計量でエネルギースペクトルを決定した。結果は、衝突(2次)起源モデルとよく整合し、1次起源反陽子の兆候は観測されていない。太陽活動が極小期にむけた過渡期にあたる2004年の観測として予想に沿った結果を得た。反ヘリウム探索は、これまでのヘリウム観測の総統計量を2倍以上に高め、反ヘリウム／ヘリウム比の上限値を2.7×10(exp -7)にまで押し下げた。本報告では、BESS-Polar(2004年)の成果を纏め、次期太陽活動極小期(2007年)における第2回南極周回気球実験計画を述べる。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The Balloon-borne Experiment with a Superconducting Spectrometer with long duration flights in Antarctica (BESS-Polar) has been progressed. It aims at searches for primordial antiparticles in low-energy cosmic rays with unprecedented sensitivity in the solar minimum period. This report describes the status and future plan of the BESS-Polar experiment.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0063732006","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: JAXA-RR-07-009","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1349-1113","subitem_source_identifier_type":"ISSN"}]},"item_3_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA1192675X","subitem_source_identifier_type":"NCID"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"高エネルギー加速器研究機構"},{"subitem_text_value":"神戸大学"},{"subitem_text_value":"東京大学"},{"subitem_text_value":"神戸大学"},{"subitem_text_value":"高エネルギー加速器研究機構"},{"subitem_text_value":"神戸大学"},{"subitem_text_value":"高エネルギー加速器研究機構"},{"subitem_text_value":"東京大学"},{"subitem_text_value":"神戸大学"},{"subitem_text_value":"東京大学"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"High Energy Accelerator Research Organization"},{"subitem_text_language":"en","subitem_text_value":"Kobe University"},{"subitem_text_language":"en","subitem_text_value":"University of Tokyo"},{"subitem_text_language":"en","subitem_text_value":"Kobe University"},{"subitem_text_language":"en","subitem_text_value":"High Energy Accelerator Research Organization"},{"subitem_text_language":"en","subitem_text_value":"Kobe University"},{"subitem_text_language":"en","subitem_text_value":"High Energy Accelerator Research Organization"},{"subitem_text_language":"en","subitem_text_value":"University of Tokyo"},{"subitem_text_language":"en","subitem_text_value":"Kobe University"},{"subitem_text_language":"en","subitem_text_value":"University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"山本, 明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"安部, 航"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"泉, 康介"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"板崎, 輝"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"大宮, 英紀"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"折戸, 玲子"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"熊沢, 輝之"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"坂井, 賢一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"志風, 義明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"篠田, 遼子"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamamoto, Akira","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Abe, Ko","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Izumi, Kosuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Itasaki, Akira","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Omiya, Hidenori","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Orito, 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instrument","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"balloon sounding","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"high altitude balloon","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Antarctica","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"superconducting spectrometer","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"cosmic ray","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"BESS-Polar experiment","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"solar 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