{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:QJE7S6DPVAZTSJX466Y33NGUPO","short_pith_number":"pith:QJE7S6DP","canonical_record":{"source":{"id":"1403.0373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-03T10:30:20Z","cross_cats_sorted":[],"title_canon_sha256":"c23a32bec44fb907a55ebd3667a286369de75bcd683b91f7506f1eaa6b5ed146","abstract_canon_sha256":"10f2bcdc6eb2ab29746a88251588006f2bb9e49daf9ac473d01817c13f37c2b1"},"schema_version":"1.0"},"canonical_sha256":"8249f9786fa8333926fcf7b1bdb4d47b86f1b0eb2ac0f9bb7ba8e8d3d19436ec","source":{"kind":"arxiv","id":"1403.0373","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.0373","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"arxiv_version","alias_value":"1403.0373v1","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.0373","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"pith_short_12","alias_value":"QJE7S6DPVAZT","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_16","alias_value":"QJE7S6DPVAZTSJX4","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_8","alias_value":"QJE7S6DP","created_at":"2026-05-18T12:28:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:QJE7S6DPVAZTSJX466Y33NGUPO","target":"record","payload":{"canonical_record":{"source":{"id":"1403.0373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-03T10:30:20Z","cross_cats_sorted":[],"title_canon_sha256":"c23a32bec44fb907a55ebd3667a286369de75bcd683b91f7506f1eaa6b5ed146","abstract_canon_sha256":"10f2bcdc6eb2ab29746a88251588006f2bb9e49daf9ac473d01817c13f37c2b1"},"schema_version":"1.0"},"canonical_sha256":"8249f9786fa8333926fcf7b1bdb4d47b86f1b0eb2ac0f9bb7ba8e8d3d19436ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:57:25.064352Z","signature_b64":"BnbfWttr/iWyucefk0foF4gcOlEOpkWiRcQqs1WRfTQlC7yicez+q7NPbpVS6bt+UoStMkzTinjzPkkPBMqQAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8249f9786fa8333926fcf7b1bdb4d47b86f1b0eb2ac0f9bb7ba8e8d3d19436ec","last_reissued_at":"2026-05-18T02:57:25.063649Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:57:25.063649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.0373","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:57:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nKOb0EdkUCisrB9wDz6Ie4b3Yu5i31qRCwWghLPK1nqQ+OH8O8GRAygjQNnN28fl48SSsvdPrmTyQw4Nv84VAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:45:39.576102Z"},"content_sha256":"8e80d962578236d49c07c9db335373e5c988d387a3fb1c8f2756e7ddb4cf2e75","schema_version":"1.0","event_id":"sha256:8e80d962578236d49c07c9db335373e5c988d387a3fb1c8f2756e7ddb4cf2e75"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:QJE7S6DPVAZTSJX466Y33NGUPO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An improved elliptic guide concept for a homogeneous neutron beam without direct line of sight","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"C. Zendler, D. Nekrassov, K. Lieutenant","submitted_at":"2014-03-03T10:30:20Z","abstract_excerpt":"Ballistic neutron guides are efficient for neutron transport over long distances, and in particular elliptically shaped guides have received much attention lately. However, elliptic neutron guides generally deliver an inhomogeneous divergence distribution when used with a small source, and do not allow kinks or curvature to avoid a direct view from source to sample. In this article, a kinked double-elliptic solution is found for neutron transport to a small sample from a small (virtual) source, as given e.g. for instruments using a pinhole beam extraction with a focusing feeder. A guide consis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.0373","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:57:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UxFGA9/w4MjfpasKa1mDkkfQvGZck8oiKFwIE0qPKi3gsVoIpe8I4WCltwUDPzYX13cGVrUSTyPTR3swRnTFDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:45:39.576832Z"},"content_sha256":"d08c48270b498b6f8c7c97f244d4a09042601314487719cee3d762e53923a61b","schema_version":"1.0","event_id":"sha256:d08c48270b498b6f8c7c97f244d4a09042601314487719cee3d762e53923a61b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJE7S6DPVAZTSJX466Y33NGUPO/bundle.json","state_url":"https://pith.science/pith/QJE7S6DPVAZTSJX466Y33NGUPO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJE7S6DPVAZTSJX466Y33NGUPO/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T15:45:39Z","links":{"resolver":"https://pith.science/pith/QJE7S6DPVAZTSJX466Y33NGUPO","bundle":"https://pith.science/pith/QJE7S6DPVAZTSJX466Y33NGUPO/bundle.json","state":"https://pith.science/pith/QJE7S6DPVAZTSJX466Y33NGUPO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJE7S6DPVAZTSJX466Y33NGUPO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:QJE7S6DPVAZTSJX466Y33NGUPO","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":"10f2bcdc6eb2ab29746a88251588006f2bb9e49daf9ac473d01817c13f37c2b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-03T10:30:20Z","title_canon_sha256":"c23a32bec44fb907a55ebd3667a286369de75bcd683b91f7506f1eaa6b5ed146"},"schema_version":"1.0","source":{"id":"1403.0373","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.0373","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"arxiv_version","alias_value":"1403.0373v1","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.0373","created_at":"2026-05-18T02:57:25Z"},{"alias_kind":"pith_short_12","alias_value":"QJE7S6DPVAZT","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_16","alias_value":"QJE7S6DPVAZTSJX4","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_8","alias_value":"QJE7S6DP","created_at":"2026-05-18T12:28:46Z"}],"graph_snapshots":[{"event_id":"sha256:d08c48270b498b6f8c7c97f244d4a09042601314487719cee3d762e53923a61b","target":"graph","created_at":"2026-05-18T02:57:25Z","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":"Ballistic neutron guides are efficient for neutron transport over long distances, and in particular elliptically shaped guides have received much attention lately. However, elliptic neutron guides generally deliver an inhomogeneous divergence distribution when used with a small source, and do not allow kinks or curvature to avoid a direct view from source to sample. In this article, a kinked double-elliptic solution is found for neutron transport to a small sample from a small (virtual) source, as given e.g. for instruments using a pinhole beam extraction with a focusing feeder. A guide consis","authors_text":"C. Zendler, D. Nekrassov, K. Lieutenant","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-03T10:30:20Z","title":"An improved elliptic guide concept for a homogeneous neutron beam without direct line of sight"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.0373","kind":"arxiv","version":1},"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":"sha256:8e80d962578236d49c07c9db335373e5c988d387a3fb1c8f2756e7ddb4cf2e75","target":"record","created_at":"2026-05-18T02:57:25Z","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":"10f2bcdc6eb2ab29746a88251588006f2bb9e49daf9ac473d01817c13f37c2b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-03T10:30:20Z","title_canon_sha256":"c23a32bec44fb907a55ebd3667a286369de75bcd683b91f7506f1eaa6b5ed146"},"schema_version":"1.0","source":{"id":"1403.0373","kind":"arxiv","version":1}},"canonical_sha256":"8249f9786fa8333926fcf7b1bdb4d47b86f1b0eb2ac0f9bb7ba8e8d3d19436ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8249f9786fa8333926fcf7b1bdb4d47b86f1b0eb2ac0f9bb7ba8e8d3d19436ec","first_computed_at":"2026-05-18T02:57:25.063649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:57:25.063649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BnbfWttr/iWyucefk0foF4gcOlEOpkWiRcQqs1WRfTQlC7yicez+q7NPbpVS6bt+UoStMkzTinjzPkkPBMqQAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:57:25.064352Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.0373","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e80d962578236d49c07c9db335373e5c988d387a3fb1c8f2756e7ddb4cf2e75","sha256:d08c48270b498b6f8c7c97f244d4a09042601314487719cee3d762e53923a61b"],"state_sha256":"377889214021454098091e5d9e1cd279917e0380d0ceae6cf10f88c13674fe02"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qh3pef8Vy2VNmpAYal96drPTLrfXqkxPd9CauBDgw28HD/haZR0Bq+Lhe6wo4YBDiLqmP5nq6l30RYYn3BRdCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T15:45:39.580643Z","bundle_sha256":"1bc8d6d0414a98f4c5adb6b4387bb0d58cdea0752bc1315ed2a942039c4ec8b2"}}