{"created":"2023-05-15T14:55:02.331308+00:00","id":74804,"links":{},"metadata":{"_buckets":{"deposit":"1af82956-d85a-466c-a9d1-aed6e03443b3"},"_deposit":{"created_by":1,"id":"74804","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"74804"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00074804","sets":["1"]},"author_link":["805203","805201","805198","805202","805205","805200","805199","805197","805204"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicPageStart":"066004","bibliographicVolumeNumber":"59","bibliographic_titles":[{"bibliographic_title":"Nuclear Fusion"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Abstract. The capacitively-coupled combline (CCC) antenna has been developed for current drive by the lower hybrid wave (LHW) on the TST-2 spherical tokamak.\nThe combline antenna was developed to satisfy the requirements of high directionality, low re\nectivity, and simple feeding. Since the combline antenna makes use of mutual coupling between neighboring elements, only the rst and the last elements are connected to external feedlines. RF powers and power densities of the order of 100kW and 1MW/m2 can be achieved easily in small antennas of the order of 0.1m2. The two CCC antennas installed in TST-2 (outboard-launch and top-launch) excite toroidal refractive index (n) spectra peaked around 5 with the frequency of 200 MHz. Wave excitation calculation using a nite element code shows that the excited power of the n = 5 LHW component increases rapidly when the plasma cuto density layer (where ne = 5  1014 m????3) becomes closer than 27mm from the antenna surface, in agreement with experiment. Experimentally, the density prole in front of the antenna can be controlled by adjusting the side limiter location or antenna-plasma distance, and should be optimized for antenna-plasma coupling, since too high coupling results in a broadened and less directional n spectrum, and too low coupling results in a less ecient power coupling. Using these antennas, successful ST plasma start-up and\nIp ramp-up to over 25 kA (about 1/4 of the nominal Ip for OH operation) have been achieved with RF power of less than 100kW in about 40 ms.","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOP Publishing"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/1741-4326/ab0f61","subitem_relation_type_select":"DOI"}}]},"item_8_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://iopscience.iop.org/article/10.1088/1741-4326/ab0f61","subitem_relation_type_select":"URI"}}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0029-5515","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":"Yajima, S."}],"nameIdentifiers":[{"nameIdentifier":"805197","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takase, Y."}],"nameIdentifiers":[{"nameIdentifier":"805198","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tajiri, Y."}],"nameIdentifiers":[{"nameIdentifier":"805199","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takei, Y."}],"nameIdentifiers":[{"nameIdentifier":"805200","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tsujii, N."}],"nameIdentifiers":[{"nameIdentifier":"805201","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamazaki, H."}],"nameIdentifiers":[{"nameIdentifier":"805202","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"P. Moeller, C."}],"nameIdentifiers":[{"nameIdentifier":"805203","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"新屋, 貴浩"}],"nameIdentifiers":[{"nameIdentifier":"805204","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shinya, Takahiro","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"805205","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":"Development of capacitively-coupled combline antennas for current drive in tokamaks","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Development of capacitively-coupled combline antennas for current drive in tokamaks"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-03-18"},"publish_date":"2019-03-18","publish_status":"0","recid":"74804","relation_version_is_last":true,"title":["Development of capacitively-coupled combline antennas for current drive in tokamaks"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:40:44.501007+00:00"}