{"created":"2023-06-20T15:17:42.985171+00:00","id":11648,"links":{},"metadata":{"_buckets":{"deposit":"408f3454-1493-46c7-a6d1-391c013e6e7d"},"_deposit":{"created_by":20,"id":"11648","owners":[20],"pid":{"revision_id":0,"type":"depid","value":"11648"},"status":"published"},"_oai":{"id":"oai:nifs-repository.repo.nii.ac.jp:00011648","sets":["6:7"]},"author_link":["127671","128062","122986","128055","128059","128061","122145","128053","127670","128060","66530","128063","128064","128051","126826","128071","128052","128066","128070","127847","127420","128057","128065","127845","126510","128067","128069","128068","127417","128056","122132","128058","128054","127494"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-10-25","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"11","bibliographicPageStart":"116072","bibliographicVolumeNumber":"61","bibliographic_titles":[{"bibliographic_title":"Nuclear Fusion"}]}]},"item_10001_description_4":{"attribute_name":"著者ID","attribute_value_mlt":[{"subitem_description":"0000-0002-3354-0279","subitem_description_type":"Other"}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The neoclassical transport optimization of the Wendelstein 7-X stellarator has not resulted in the predicted high energy confinement of gas fueled electron-cyclotron-resonance-heated (ECRH) plasmas as modelled in (Turkin et al 2011 Phys. Plasmas 18 022505) due to high levels of turbulent heat transport observed in the experiments. The electron-turbulent-heat transport appears non-stiff and is of the electron temperature gradient (ETG)/ion temperature gradient (ITG) type (Weir et al 2021 Nucl. Fusion 61 056001). As a result, the electron temperature Te can be varied freely from 1 keV–10 keV within the range of PECRH = 1–7 MW, with electron density ne values from 0.1–1.5 × 1020 m−3. By contrast, in combination with the broad electron-to-ion energy-exchange heating profile in ECRH plasmas, ion-turbulent-heat transport leads to clamping of the central ion temperature at Ti ∼ 1.5 keV ± 0.2 keV. In a dedicated ECRH power scan at a constant density of 〈ne〉 = 7 × 1019 m−3, an apparent 'negative ion temperature profile stiffness' was found in the central plasma for (r/a < 0.5), in which the normalized gradient ∇Ti/Ti decreases with increasing ion heat flux. The experiment was conducted in helium, which has a higher radiative density limit compared to hydrogen, allowing a broader power scan. This 'negative stiffness' is due to a strong exacerbation of turbulent transport with an increasing ratio of Te/Ti in this electron-heated plasma. This finding is consistent with electrostatic microinstabilities, such as ITG-driven turbulence. Theoretical calculations made by both linear and nonlinear gyro-kinetic simulations performed by the GENE code in the W7-X three-dimensional geometry show a strong enhancement of turbulence with an increasing ratio of Te/Ti. The exacerbation of turbulence with increasing Te/Ti is also found in tokamaks and inherently enhances ion heat transport in electron-heated plasmas. This finding strongly affects the prospects of future high-performance gas-fueled ECRH scenarios in W7-X and imposes a requirement for turbulence-suppression techniques.","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":" IOP Publishing"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/1741-4326/ac1653","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"M.N.A. Beurskens et al 2021 Nucl. Fusion 61 116072"}]}]},"item_10001_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"Publisher version"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://doi.org/10.1088/1741-4326/ac1653","subitem_relation_type_select":"DOI"}}]},"item_10001_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© EURATOM 2021"},{"subitem_rights":"Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. "},{"subitem_rights":"Any further distribution of this work mustmaintain attribution to the author(s) and the title of the work, journal citation and DOI."}]},"item_10001_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00759871 ","subitem_source_identifier_type":"NCID"}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0029-5515","subitem_source_identifier_type":"ISSN"}]},"item_10001_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"BEURSKENS, Marc"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"BOZHENKOV, Sergey"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FORD, O."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"XANTHOPUOLOS, Pavlos"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ZOCCO, Alessandro"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TURKIN,  Yuri"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ALONSO, Juan Arturo"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"BEIDLER, Craig"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"CALVO, I."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"CARRALERO, Daniel"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ESTRADA, Teresa"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FUCHERT, Golo"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"GRULKE, O."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"HIRSCH, M."}],"nameIdentifiers":[{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":""}],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"IDA,  Katsumi"}],"familyNames":[{}],"givenNames":[{}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"JAKUBOWSKI,  Marcin"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KILLER, Carsten"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KRYCHOWIAK, Maciej"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KWAK, Sehyun"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"LAZERSON, Samuel"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"LANGENBERG, Andreas"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"LUNSFORD, Robert"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"PABLANT, Novimir"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"PASCH, E."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"PAVONE, Andrea"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"REIMOLD, F."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ROMBA, Thilo"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"STECHOW, A. von"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"SMITH, H. M."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"WINDISCH, T."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"YOSHINUMA,  Mikirou"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ZHANG, Daihong"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"WOLF, Robert"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"the W7-X Team"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2023-03-03"}],"displaytype":"detail","filename":"Nucl.Fusion_61_116072.pdf","filesize":[{"value":"6.8 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"Nucl.Fusion_61_116072","url":"https://nifs-repository.repo.nii.ac.jp/record/11648/files/Nucl.Fusion_61_116072.pdf"},"version_id":"e2b07fea-8106-4d72-8a94-d7f6a15a1806"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"turbulent transport","subitem_subject_scheme":"Other"},{"subitem_subject":"electron heated plasmas","subitem_subject_scheme":"Other"},{"subitem_subject":"ion heat transport","subitem_subject_scheme":"Other"},{"subitem_subject":"neoclassically optimised stellarator","subitem_subject_scheme":"Other"},{"subitem_subject":"power balance","subitem_subject_scheme":"Other"},{"subitem_subject":"profile stiffness","subitem_subject_scheme":"Other"},{"subitem_subject":"ion temperature clampingElectron cyclotron heating","subitem_subject_scheme":"Other"}]},"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":"Ion temperature clamping in Wendelstein 7-X electron cyclotron heated plasmas","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Ion temperature clamping in Wendelstein 7-X electron cyclotron heated plasmas"}]},"item_type_id":"10001","owner":"20","path":["7"],"pubdate":{"attribute_name":"公開日","attribute_value":"2023-03-03"},"publish_date":"2023-03-03","publish_status":"0","recid":"11648","relation_version_is_last":true,"title":["Ion temperature clamping in Wendelstein 7-X electron cyclotron heated plasmas"],"weko_creator_id":"20","weko_shared_id":-1},"updated":"2023-07-28T06:36:08.687341+00:00"}