{"created":"2023-05-15T14:53:26.332437+00:00","id":72772,"links":{},"metadata":{"_buckets":{"deposit":"4019d7b4-f9d5-4c91-849f-a34129ffb58f"},"_deposit":{"created_by":1,"id":"72772","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"72772"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00072772","sets":["10:28"]},"author_link":["716860","716863","716868","716861","716871","716875","716866","716862","716873","716870","716867","716869","716874","716876","716864","716872","716858","716865","716859"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2017-05-16","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Tritium (T) distributions in divertor tiles retrieved from the JET-ITER Like Wall (ILW) after the 1st (2011–2012) and 2nd (2013–2014) experimental campaigns were examined by measuring energy spectra of X-rays induced by β-rays from T. Disk specimens cored from the W-coated CFC divertor tiles (Tiles 1, 4, 6, 7 and 8) were analysed using a silicon-drift detector (SDD) equipped with an ultra-thin window (70 nm-thick Si3N4) at QST, Rokkasho. Analysis using a SDD with a conventional window (8 μm-thick Be) was performed at VTT. The former SDD was used to detect characteristic X-rays of Be together with those of W, while the latter was more suitable for non-destructive depth profiling by analysing X-ray energy spectra. A majority of T currently present in the JET vacuum vessel is produced by DD fusion reactions [D + D → T (1.01 MeV) + H (3.03 MeV)]. Therefore, T is present as a minor isotope of hydrogen in the vessel. A part of T produced is implanted into the tiles at high energy (~MeV), while a remaining part of T is thermalized in the plasma. Strong peaks of Be KαX-rays were observed for the horizontal and upper vertical parts of Tile 1 due to heavy co-deposition of T with Be eroded from the main chamber wall. Intensity of Be KαX-rays was below detection limit for other tiles because of far smaller thickness or absence of Be deposition layer. In contrast, the intensity of W MαX-rays was almost uniform though it was somewhat high at the positions close to the main plasma (the horizontal parts of Tiles 1 and 8). Depth profile analyses showed that T penetrated into depths up to 0.5–4 μm. These observations indicated the implantation of high energy T into the W layers.  Exceptionally high intensity of X-rays (and also γ-rays) was observed at the shadowed region of Tile 4, though thermal desorption spectrometry showed relatively small D retention in this region. The mechanisms underlying this exceptional T accumulation will be discussed in the presentation by taking account of the results of microstructural analysis.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"16th International Conference on Plasma-Facing Materials and Components for Fusion Applications (PFMC-16)","subitem_description_type":"Other"}]},"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":"Hatanoa, Y."}],"nameIdentifiers":[{"nameIdentifier":"716858","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yumizurua, K."}],"nameIdentifiers":[{"nameIdentifier":"716859","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Masuzaki, S."}],"nameIdentifiers":[{"nameIdentifier":"716860","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tokitani, M."}],"nameIdentifiers":[{"nameIdentifier":"716861","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Asakura, Nobuyuki"}],"nameIdentifiers":[{"nameIdentifier":"716862","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Isobe, Kanetsugu"}],"nameIdentifiers":[{"nameIdentifier":"716863","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hayashi, Takumi"}],"nameIdentifiers":[{"nameIdentifier":"716864","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Koivuranta, S."}],"nameIdentifiers":[{"nameIdentifier":"716865","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Likonen, J."}],"nameIdentifiers":[{"nameIdentifier":"716866","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsuyama, M."}],"nameIdentifiers":[{"nameIdentifier":"716867","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Baron-Wiechec, A."}],"nameIdentifiers":[{"nameIdentifier":"716868","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Widdowson, A."}],"nameIdentifiers":[{"nameIdentifier":"716869","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Heinola, K."}],"nameIdentifiers":[{"nameIdentifier":"716870","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Jachmich, S."}],"nameIdentifiers":[{"nameIdentifier":"716871","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Rubel, M."}],"nameIdentifiers":[{"nameIdentifier":"716872","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"contributors, JET"}],"nameIdentifiers":[{"nameIdentifier":"716873","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"朝倉 伸幸","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"716874","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"磯部 兼嗣","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"716875","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"林 巧","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"716876","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":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Tritium Analysis of Divertor Tiles Used in JET ITER-like Wall Campaigns by Means of β-ray Induced X-ray Spectrometry","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Tritium Analysis of Divertor Tiles Used in JET ITER-like Wall Campaigns by Means of β-ray Induced X-ray Spectrometry"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-05-02"},"publish_date":"2018-05-02","publish_status":"0","recid":"72772","relation_version_is_last":true,"title":["Tritium Analysis of Divertor Tiles Used in JET ITER-like Wall Campaigns by Means of β-ray Induced X-ray Spectrometry"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:36:14.310620+00:00"}