{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361694366752098048.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.hedp.2019.04.002"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S1574181818300855?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S1574181818300855?httpAccept=text/plain"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Application of nuclear emulsions for the identification of multi-MeV protons in laser ion acceleration experiments"}],"description":[{"notation":[{"@value":"Abstract   Nuclear emulsions are applied to identify multi-MeV protons accelerated by an intense PW-class laser. Although nuclear emulsions, which record the three-dimensional trajectories of charged particles, feature high sensitivity and a sub-micron spatial resolution, they have never been used for the detection of laser-accelerated ions. This is because intense laser-matter interactions generate not only ions but also copious electrons, including secondary electrons induced by X-rays, which are recorded as background noise in a nuclear emulsion. Therefore, it is not a trivial task to identify ion tracks in a nuclear emulsion exposed to such extreme mixed radiation fields. Here, for the first time, we have succeeded in identifying the signals from laser-accelerated protons in nuclear emulsions by suppressing the background noise signals through the use of desensitized development conditions, i.e., a developer solution with a pH of 7.3 and a development time of 25 min. The energy spectrum obtained from a stack of nuclear emulsion films shows good agreement with that obtained from a stack of films of the conventional solid-state nuclear track detector material CR-39, which is sensitive only to ions. An additional benchmark experiment with 100-MeV protons from a conventional accelerator apparatus confirms that nuclear emulsions have the potential to measure 100-MeV-class laser-accelerated protons."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381694366752098052","@type":"Researcher","foaf:name":[{"@value":"Takafumi Asai"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098056","@type":"Researcher","foaf:name":[{"@value":"Masato Kanasaki"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098051","@type":"Researcher","foaf:name":[{"@value":"Satoshi Jinno"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098055","@type":"Researcher","foaf:name":[{"@value":"Nobuko Kitagawa"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098049","@type":"Researcher","foaf:name":[{"@value":"Nobumichi Shutoh"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098057","@type":"Researcher","foaf:name":[{"@value":"Satoshi Kodaira"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098050","@type":"Researcher","foaf:name":[{"@value":"Tomoya Yamauchi"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098053","@type":"Researcher","foaf:name":[{"@value":"Keiji Oda"}]},{"@id":"https://cir.nii.ac.jp/crid/1381694366752098048","@type":"Researcher","foaf:name":[{"@value":"Kunihiro Morishima"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801207103232","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"30311327"},{"@type":"NRID","@value":"1000030311327"},{"@type":"NRID","@value":"9000250748027"},{"@type":"NRID","@value":"9000413563272"},{"@type":"NRID","@value":"9000405662268"},{"@type":"NRID","@value":"9000410042898"}],"foaf:name":[{"@value":"Yuji Fukuda"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"15741818"}],"prism:publicationName":[{"@value":"High Energy Density Physics"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2019-07","prism:volume":"32","prism:startingPage":"44","prism:endingPage":"50"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S1574181818300855?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S1574181818300855?httpAccept=text/plain"}],"createdAt":"2019-04-15","modifiedAt":"2025-10-28","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782013478784","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"19H00668"},{"@type":"JGN","@value":"JP19H00668"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H00668/"}],"notation":[{"@language":"ja","@value":"相対論プラズマ中での多段階イオン加速による準単色陽子加速の物理とその実証"},{"@language":"en","@value":"Science and Verification of Multi-Staged Acceleration of Quasimonoenergetic Protons in Relativistic 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