{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:KPBLKLAXEIFFCGKH3MGHUDOYO5","short_pith_number":"pith:KPBLKLAX","schema_version":"1.0","canonical_sha256":"53c2b52c17220a511947db0c7a0dd87752568754c04dadc1a0d172b52beaab91","source":{"kind":"arxiv","id":"1503.07936","version":2},"attestation_state":"computed","paper":{"title":"Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Toyoda, G. Tanaka, H. Matsumura, H. M. Shimizu, H. Oide, H. Otono, H. Sumino, H. Yokoyama, K. Mishima, K. Taketani, K. Tauchi, M. Kitaguchi, M. Tanaka, N. Higashi, N. Sumi, R. Katayama, R. Kitahara, R. Sakakibara, S. Yamashita, T. Ino, T. Shima, T. Sugino, T. Yamada, T. Yoshioka, Y. Arimoto, Y. Igarashi, Y. Iwashita","submitted_at":"2015-03-27T01:30:49Z","abstract_excerpt":"A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources and the beam radioactivity is a challenging aspect of this measurement. To overcome this problem, the developed TPC has unprecedented features such as the use of polyether-ether-ketone plates in the support structure and internal surfaces covered with $^6$Li-enriched tiles to absorb outlier neutrons. In this paper, the design and performance of the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1503.07936","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-27T01:30:49Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"537d6bfa4cb259d7bdf98963baa9686444dbb80f69964ab17e6d017b3c52122c","abstract_canon_sha256":"73f3c8610d1c7e59b1f11ba7ca381ad2f161b18a0360199a4537007bc1a0b987"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:24.112339Z","signature_b64":"YNA1zGz8ybkHYU9HZPCUqTn0qX+F666sU42mWq7XPklciXrLi4laRoqUATzb5F/cEISpnHh1GRHLE7d7uBqbBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53c2b52c17220a511947db0c7a0dd87752568754c04dadc1a0d172b52beaab91","last_reissued_at":"2026-05-18T01:33:24.111806Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:24.111806Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Toyoda, G. Tanaka, H. Matsumura, H. M. Shimizu, H. Oide, H. Otono, H. Sumino, H. Yokoyama, K. Mishima, K. Taketani, K. Tauchi, M. Kitaguchi, M. Tanaka, N. Higashi, N. Sumi, R. Katayama, R. Kitahara, R. Sakakibara, S. Yamashita, T. Ino, T. Shima, T. Sugino, T. Yamada, T. Yoshioka, Y. Arimoto, Y. Igarashi, Y. Iwashita","submitted_at":"2015-03-27T01:30:49Z","abstract_excerpt":"A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources and the beam radioactivity is a challenging aspect of this measurement. To overcome this problem, the developed TPC has unprecedented features such as the use of polyether-ether-ketone plates in the support structure and internal surfaces covered with $^6$Li-enriched tiles to absorb outlier neutrons. In this paper, the design and performance of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07936","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1503.07936","created_at":"2026-05-18T01:33:24.111884+00:00"},{"alias_kind":"arxiv_version","alias_value":"1503.07936v2","created_at":"2026-05-18T01:33:24.111884+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07936","created_at":"2026-05-18T01:33:24.111884+00:00"},{"alias_kind":"pith_short_12","alias_value":"KPBLKLAXEIFF","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_16","alias_value":"KPBLKLAXEIFFCGKH","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_8","alias_value":"KPBLKLAX","created_at":"2026-05-18T12:29:29.992203+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5","json":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5.json","graph_json":"https://pith.science/api/pith-number/KPBLKLAXEIFFCGKH3MGHUDOYO5/graph.json","events_json":"https://pith.science/api/pith-number/KPBLKLAXEIFFCGKH3MGHUDOYO5/events.json","paper":"https://pith.science/paper/KPBLKLAX"},"agent_actions":{"view_html":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5","download_json":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5.json","view_paper":"https://pith.science/paper/KPBLKLAX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1503.07936&json=true","fetch_graph":"https://pith.science/api/pith-number/KPBLKLAXEIFFCGKH3MGHUDOYO5/graph.json","fetch_events":"https://pith.science/api/pith-number/KPBLKLAXEIFFCGKH3MGHUDOYO5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5/action/storage_attestation","attest_author":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5/action/author_attestation","sign_citation":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5/action/citation_signature","submit_replication":"https://pith.science/pith/KPBLKLAXEIFFCGKH3MGHUDOYO5/action/replication_record"}},"created_at":"2026-05-18T01:33:24.111884+00:00","updated_at":"2026-05-18T01:33:24.111884+00:00"}