{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TX32XOCXV6V42BFZ5VT75ZHLWK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6c4fc5bff6909f83986b51b1899e44ee42ca3db34497446ba054cfe01d957870","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-26T17:16:31Z","title_canon_sha256":"5b42f4e03f69232dab7e6e2a111941aff084f9dcae0907d8882e40e19fab1c7c"},"schema_version":"1.0","source":{"id":"1507.07223","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07223","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07223v3","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07223","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"pith_short_12","alias_value":"TX32XOCXV6V4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TX32XOCXV6V42BFZ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TX32XOCX","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:b9fee1b3fb03d10c46a0a2ffbc7e35bc78b5e818e8468711add342f4adbc97b4","target":"graph","created_at":"2026-05-18T01:22:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We have constructed a Doppler-shifter-type pulsed ultra-cold neutron (UCN) source at the Materials and Life Science Experiment Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). Very-cold neutrons (VCNs) with 136-$\\mathrm{m/s}$ velocity in a neutron beam supplied by a pulsed neutron source are decelerated by reflection on a m=10 wide-band multilayer mirror, yielding pulsed UCN. The mirror is fixed to the tip of a 2,000-rpm rotating arm moving with 68-$\\mathrm{m/s}$ velocity in the same direction as the VCN. The repetition frequency of the pulsed UCN is $8.33~\\mathrm{Hz}$","authors_text":"H. M. Shimizu, K. Mishima, M. Hino, M. Kitaguchi, N. L. Yamada, R. Katayama, S. Imajo, S. Yamashita, T. Ino, T. Oda, Y. Iwashia","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-26T17:16:31Z","title":"Pulsed UCN production using a Doppler shifter at J-PARC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07223","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:dd05e041e874d0ff8c88c9cd0c816e3ba439b223b05940e6dc17be4caf237b1a","target":"record","created_at":"2026-05-18T01:22:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6c4fc5bff6909f83986b51b1899e44ee42ca3db34497446ba054cfe01d957870","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-26T17:16:31Z","title_canon_sha256":"5b42f4e03f69232dab7e6e2a111941aff084f9dcae0907d8882e40e19fab1c7c"},"schema_version":"1.0","source":{"id":"1507.07223","kind":"arxiv","version":3}},"canonical_sha256":"9df7abb857afabcd04b9ed67fee4ebb2809fab0d155f14f6cab9fc5f947720d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9df7abb857afabcd04b9ed67fee4ebb2809fab0d155f14f6cab9fc5f947720d1","first_computed_at":"2026-05-18T01:22:37.612533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:37.612533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dfNu/i2VKppUpStWb2Ee3YkolS7Dc3rCLgadtWuSqNwz7miV4Tb0IyRq0puQAt6bI3UrmVQnfHELEuxsE6FnDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:37.613042Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.07223","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd05e041e874d0ff8c88c9cd0c816e3ba439b223b05940e6dc17be4caf237b1a","sha256:b9fee1b3fb03d10c46a0a2ffbc7e35bc78b5e818e8468711add342f4adbc97b4"],"state_sha256":"0b10b4cb0e35b93c1eab8ee40f6dabb309af0a9287bac3e7189b4d67c722d6fc"}