{"_buckets": {"deposit": "4db5070a-3f04-407f-a763-344017787ca8"}, "_deposit": {"id": "11243", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11243"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011243", "sets": ["1093"]}, "author_link": ["34085", "34086", "34087", "34088"], "item_1618209983323": {"attribute_name": "助成情報", "attribute_value_mlt": [{"subitem_award_numbers": {"subitem_award_number": "11480113", "subitem_award_uri": "https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-11480113"}, "subitem_award_titles": [{"subitem_award_title": "トカマクプラズマにおけるプラズマ回転の動的形成過程", "subitem_award_title_language": "ja"}], "subitem_funder_identifiers": {"subitem_funder_identifier": "https://doi.org/10.13039/501100001691", "subitem_funder_identifier_type": "Crossref Funder"}, "subitem_funder_names": [{"subitem_funder_name": "日本学術振興会", "subitem_funder_name_language": "ja"}]}]}, "item_19_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2002-03", "bibliographicIssueDateType": "Issued"}}]}, "item_19_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "本研究は、(1)トカマクプラズマにおけるプラズマ回転の動的形成過程の解明、(2)プラズマ回転形成過程と電場シアー形成との関連の解明、(3)回転ヘリカル磁場印加によるプラズマ回転駆動機構の解明等を目的として行われた。これまでに得られた成果は、・プラズマ回転形成過程の詳細な実験を行うために、既設小型トカマク装置HYBTOK-IIにIGBTインバータ電源をジュールコイルおよび垂直磁場コイル電源用に導入し、プラズマ電流の任意波形制御とディジタル信号処理回路とIGBT高速垂直磁場電源を組み合わせたプラズマ水平位置制御により、これまでのコンデンサバンク方式のトカマク放電では得られなかった幅広い放電条件化で再現性良くプラズマを生成することが可能となった。・主モードm=6/n=1の回転ヘリカル磁場を発生するヘリカルコイルをHYBTOK-IIトカマクに据え付け、ヘリカル摂動磁場のプラズマ中への浸透過程が、外部回転ヘリカル摂動磁場とプラズマの自発的回転(E×B回転)との相対的速度により、摂動磁場が増幅(相対回転速度:小)する場合と摂動磁場が減衰(相対速度:大)する場合があることを実験および数値計算から明らかにした。・外部回転ヘリカル磁場の浸透およびヘリカル遮蔽電流の形成過程を制御するために、電極バイアス印加によるプラズマ回転制御実験を回転ヘリカル摂動磁場印加に重畳し、ヘリカル摂動磁場の浸透分布およびその時間変化を調べた結果、電極バイアス印加により相対的なプラズマ回転速度を上げた場合、より顕著な摂動磁場遮蔽効果が見られた。また、プラズマ回転のON/OFF制御による摂動磁場強度が、ある緩和時間を持って変化することが観測された。今後、詳細な時間応答性の観測により、ヘリカル摂動磁場印加による磁気島形成と遮蔽電流の誘起過程を明らかにしていく予定である。", 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"subitem_subject_scheme": "Other"}, {"subitem_subject": "Fast Feedback Control", "subitem_subject_scheme": "Other"}, {"subitem_subject": "IGBT Inverter Power Supply", "subitem_subject_scheme": "Other"}, {"subitem_subject": "IGBTインバータ", "subitem_subject_scheme": "Other"}, {"subitem_subject": "IGBTインバータ電源", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Plasma Rotation", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Rotating Helical Magnetic Field", "subitem_subject_scheme": "Other"}, {"subitem_subject": "アルフヴェン共鳴", "subitem_subject_scheme": "Other"}, {"subitem_subject": "インバータ電源", "subitem_subject_scheme": "Other"}, {"subitem_subject": "エルゴディックダイバータ", "subitem_subject_scheme": "Other"}, {"subitem_subject": "ディジタルフィードバック制御", "subitem_subject_scheme": "Other"}, {"subitem_subject": "プラズマ回転", "subitem_subject_scheme": "Other"}, {"subitem_subject": "動的エルゴディックダイバータ", "subitem_subject_scheme": "Other"}, {"subitem_subject": "回転ヘリカル摂動磁場", "subitem_subject_scheme": "Other"}, 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