{"created":"2023-05-15T14:48:41.927632+00:00","id":66714,"links":{},"metadata":{"_buckets":{"deposit":"71ac242e-e475-4c19-8d68-10a708dc6eee"},"_deposit":{"created_by":1,"id":"66714","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"66714"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00066714","sets":["10:29"]},"author_link":["656058","656076","656075","656079","656069","656074","656064","656063","656068","656066","656061","656070","656084","656085","656065","656072","656086","656067","656060","656077","656078","656081","656082","656080","656073","656062","656083","656059","656071"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2018-03-19","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We have discovered Burst Intensification by Singularity Emitting Radiation (BISER) [1], a new phenomenon which in particular results in bright coherent x-ray generation by relativistic plasma singularities driven by a multi-terawatt femtosecond laser focused onto a gas jet target [2], [3]. Singularities are produced in plasma by the laser pulse which pushes electrons creating an electron-free cavity and bow wave [4]. The singularities at the joining of the cavity wall and bow wave manifest themselves as point-like coherent x-ray emitters. A spontaneous BISER regime realized in previous experiments exhibits relatively large shot-to-shot fluctuations of the x-ray source position and low overall stability because the emission occurs after the relativistic self-focusing. However, stability is desirable for prospective applications of the new coherent x-ray source.\n\\nA tailored plasma density profile can help to control the BISER, as shown by our simulations with the PIC REMP code [5]. Here, we present an experiment with the plasma profile tailoring, where a shock in supersonic gas flow generates a sharp density up-jump. We demonstrate the BISER control using this density jump scheme and the J-KAREN-P laser [6]-[7]. In contrast to the spontaneous regime, here we obtain low-jitter x-ray source position and higher x-ray yield. Moreover, these advantages are achieved simultaneously in an optimized case. Our results represent a crucial step towards implementation of the next-generation bright compact coherent x-ray source. Further, they demonstrate the new technique of relativistic self-focusing control and its diagnostics.\n\\nWe thank the J-KAREN-P laser operation group. We acknowledge the financial support from JSPS Kakenhi JP 25390135 and JP 26707031.\n\\n[1]A. S. Pirozhkov, T. Zh. Esirkepov, et al., \"Burst intensification by singularity emitting radiation in multi-stream flows,\" Scientific Reports 7, 17968 (2017).\n[2]A.S.Pirozhkov, et al. \"Soft-X-Ray Harmonic Comb from Relativistic Electron Spikes\" Phys. Rev. Lett. 108, 135004 (2012).\n[3]A.S.Pirozhkov et al., \"High order harmonics from relativistic electron spikes\" New J. Phys. 16, 093003-30 (2014).\n[4]T. Zh. Esirkepov, Y. Kato, and S. V. Bulanov, \"Bow Wave from Ultraintense Electromagnetic Pulses in Plasmas,\" Phys. Rev. Lett. 101, 265001-4 (2008).\n[5]T. Zh. Esirkepov, \"Exact charge conservation scheme for Particle-in-Cell simulation with an arbitrary form-factor,\" Comput. Phys. Comm. 135, 144-153 (2001).\n[6]H. Kiriyama, et al., \"High-Contrast, High-Intensity Petawatt-Class Laser and Applications,\" IEEE J.S.T.Quantum Electron. 21, 1601118-18 (2015).\n[7]A.S.Pirozhkov, et al. \"Approaching the diffraction-limited, bandwidth-limited Petawatt\" Opt. Express 25, 20486 (2017).","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":"JSAP Spring Meeting","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":"ピロジコフ, アレキサンダー"}],"nameIdentifiers":[{"nameIdentifier":"656058","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"エシロケポフ, ティムル"}],"nameIdentifiers":[{"nameIdentifier":"656059","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"匂坂, 明人"}],"nameIdentifiers":[{"nameIdentifier":"656060","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"小倉, 浩一"}],"nameIdentifiers":[{"nameIdentifier":"656061","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"中新, 信彦"}],"nameIdentifiers":[{"nameIdentifier":"656062","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"黄, 開"}],"nameIdentifiers":[{"nameIdentifier":"656063","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"A., Pikuz T."}],"nameIdentifiers":[{"nameIdentifier":"656064","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ya., Faenov A."}],"nameIdentifiers":[{"nameIdentifier":"656065","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Namba, S."}],"nameIdentifiers":[{"nameIdentifier":"656066","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"大東, 出"}],"nameIdentifiers":[{"nameIdentifier":"656067","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"福田, 祐仁"}],"nameIdentifiers":[{"nameIdentifier":"656068","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"コーガ, ジェームズ"}],"nameIdentifiers":[{"nameIdentifier":"656069","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"桐山, 博光"}],"nameIdentifiers":[{"nameIdentifier":"656070","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"近藤, 公伯"}],"nameIdentifiers":[{"nameIdentifier":"656071","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"河内, 哲哉"}],"nameIdentifiers":[{"nameIdentifier":"656072","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"神門, 正城"}],"nameIdentifiers":[{"nameIdentifier":"656073","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"ピロジコフ アレキサンダー","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656074","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"エシロケポフ ティムル","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656075","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"匂坂 明人","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656076","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"小倉 浩一","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656077","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"中新 信彦","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656078","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"黄 開","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656079","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"大東 出","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656080","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"福田 祐仁","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656081","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"コーガ ジェームズ","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656082","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"桐山 博光","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656083","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"近藤 公伯","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656084","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"河内 哲哉","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656085","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"神門 正城","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"656086","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":"Plasma density jump for the control of coherent x-ray emission via BISER mechanism","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Plasma density jump for the control of coherent x-ray emission via BISER mechanism"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-03-26"},"publish_date":"2018-03-26","publish_status":"0","recid":"66714","relation_version_is_last":true,"title":["Plasma density jump for the control of coherent x-ray emission via BISER mechanism"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:45:48.785600+00:00"}