{"paper":{"title":"Performance of new 8-inch photomultiplier tube used for the Tibet muon-detector array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"Ci-Ren Laba, Ci-ren Zha-xi, Cun-Feng Feng, Ding Chen, Huan-Yu Jia, Jing Huang, Liu-Ming Zhai, Luo-bu Dan-Zen, Mao-Yuan, Qi Gao, Tian-Lu Chen, Xiao-Bin Hu, Xu Chen, Xue-Yao Zhang, Xun-Xiu Zhou, Ying Zhang, Yu-Hui Lin","submitted_at":"2016-02-29T07:00:27Z","abstract_excerpt":"A new hybrid experiment has been constructed to measure the chemical composition of cosmic rays around the \"knee\" in the wide energy range by the Tibet AS$\\gamma$ collaboration at Tibet, China, since 2014. They consist of a high-energy air-shower-core array (YAC-II), a high-density air-shower array (Tibet-III) and a large underground water-Cherenkov muon-detector array (MD). In order to obtain the primary proton, helium and iron spectra and their \"knee\" positions in the energy range lower than $10^{16}$ eV, each of PMTs equipped to the MD cell is required to measure the number of photons capab"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.00008","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}