{"id":73349,"date":"2022-09-09T17:04:13","date_gmt":"2022-09-09T08:04:13","guid":{"rendered":"https:\/\/www.waseda.jp\/inst\/research\/?p=73349"},"modified":"2022-09-09T17:04:13","modified_gmt":"2022-09-09T08:04:13","slug":"observation-of-spectral-structures-in-the-flux-of-cosmic-ray-protons-from-50-gev-to-60-tev-with-calet-on-the-iss%ef%bc%88published-in-physical-review-letters-august-2022%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.waseda.jp\/inst\/research\/news\/73349","title":{"rendered":"Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with CALET on the ISS\uff08Published in Physical Review Letters, August 2022\uff09"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n
Journal Title
\n\/\u63b2\u8f09\u30b8\u30e3\u30fc\u30ca\u30eb\u540d<\/td>\n		Physical Review Letters<\/td>\n<\/tr>\n
Publication Year and Month
\n\/\u63b2\u8f09\u5e74\u6708<\/td>\n		August, 2022<\/td>\n<\/tr>\n
Paper Title
\n\/\u8ad6\u6587\u30bf\u30a4\u30c8\u30eb<\/td>\n		Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with CALET on the ISS<\/td>\n<\/tr>\n
DOI
\n\/\u8ad6\u6587DOI<\/td>\n		10.1103\/PhysRevLett.129.101102<\/a><\/td>\n<\/tr>\n
\u00a0Author of Waseda University
\n\/\u672c\u5b66\u306e\u8457\u8005<\/td>\n		KOBAYASHI, Kazuyoshi(Researcher(Associate Professor), Faculty of Science and Engineering, Waseda Research Institute for Science and Engineering):Corresponding Author<\/td>\n<\/tr>\n
Related Websites
\n\/\u95a2\u9023Web<\/td>\n		–<\/td>\n<\/tr>\n
Abstract
\n\/\u6284\u9332<\/td>\n		A precise measurement of the cosmic-ray proton spectrum with the Calorimetric Electron Telescope (CALET) is presented in the energy interval from 50\u00a0GeV to 60\u00a0TeV, and the observation of a softening of the spectrum above 10\u00a0TeV is reported. The analysis is based on the data collected during\u00a0\u223c<\/span><\/span>6.2<\/span><\/span>\u2009<\/span><\/span><\/span>\u2009<\/span><\/span><\/span>years<\/span><\/span><\/span><\/span><\/span><\/span>\u00a0of smooth operations aboard the International Space Station and covers a broader energy range with respect to the previous proton flux measurement by CALET, with an increase of the available statistics by a factor of\u00a0\u223c<\/span><\/span>2.2<\/span><\/span><\/span><\/span><\/span>. Above a few hundred GeV we confirm our previous observation of a progressive spectral hardening with a higher significance (more than 20 sigma). In the multi-TeV region we observe a second spectral feature with a softening around 10\u00a0TeV and a spectral index change from\u00a0\u2212<\/span><\/span>2.6<\/span><\/span><\/span><\/span><\/span>\u00a0to\u00a0\u2212<\/span><\/span>2.9<\/span><\/span><\/span><\/span><\/span>\u00a0consistently, within the errors, with the shape of the spectrum reported by DAMPE. We apply a simultaneous fit of the proton differential spectrum which well reproduces the gradual change of the spectral index encompassing the lower energy power-law regime and the two spectral features observed at higher energies.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Journal Title \/\u63b2\u8f09\u30b8\u30e3\u30fc\u30ca\u30eb\u540d Physical Review Letters Publication Year and Month \/\u63b2\u8f09\u5e74\u6708 August, 2022 Paper Title \/\u8ad6\u6587\u30bf […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[218,217],"class_list":["post-73349","post","type-post","status-publish","format-standard","hentry","tag-impact-en","tag-impact"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/posts\/73349","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/comments?post=73349"}],"version-history":[{"count":1,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/posts\/73349\/revisions"}],"predecessor-version":[{"id":73350,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/posts\/73349\/revisions\/73350"}],"wp:attachment":[{"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/media?parent=73349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/categories?post=73349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/research\/wp-json\/wp\/v2\/tags?post=73349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}