{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:PMA3T7BDYMYEN4OWE4M2DYCXOX","short_pith_number":"pith:PMA3T7BD","canonical_record":{"source":{"id":"1403.1573","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-06T20:57:15Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"b149c8dd9442c0ea3994f3e211660782d8996366604ad436a3ae7f87b406ce9b","abstract_canon_sha256":"f80700b6a053dcb3f154047fee1a5968bec5e63f7f5c1e3a94e77308bddf5af7"},"schema_version":"1.0"},"canonical_sha256":"7b01b9fc23c33046f1d62719a1e05775f5d4624a019a45d0ef95775161a3320e","source":{"kind":"arxiv","id":"1403.1573","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1573","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1573v1","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1573","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"pith_short_12","alias_value":"PMA3T7BDYMYE","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PMA3T7BDYMYEN4OW","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PMA3T7BD","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:PMA3T7BDYMYEN4OWE4M2DYCXOX","target":"record","payload":{"canonical_record":{"source":{"id":"1403.1573","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-06T20:57:15Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"b149c8dd9442c0ea3994f3e211660782d8996366604ad436a3ae7f87b406ce9b","abstract_canon_sha256":"f80700b6a053dcb3f154047fee1a5968bec5e63f7f5c1e3a94e77308bddf5af7"},"schema_version":"1.0"},"canonical_sha256":"7b01b9fc23c33046f1d62719a1e05775f5d4624a019a45d0ef95775161a3320e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:18.792590Z","signature_b64":"6scY4k0T2afhhl05bEAXuoZ1Mw4J+gOPsSqhNi2L92pwU0vEICjNiYXElsJqpv8pwQLYWUdY/PIExHCGyLRkBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b01b9fc23c33046f1d62719a1e05775f5d4624a019a45d0ef95775161a3320e","last_reissued_at":"2026-05-18T01:44:18.791939Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:18.791939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.1573","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":"2026-05-18T01:44:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kr77xWQPODzrRzdE4uq6Vgzl2qfObf2UfNa3+7j3EFjP5JLPcJfC5lGuXvtjRsDd5vYSgJeao4DP054T5dFwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:43:02.083568Z"},"content_sha256":"cec74ba105ab0f5e41bd1af2b6c7aa285a5a4c555d7878fbef3a0432cccbb4e1","schema_version":"1.0","event_id":"sha256:cec74ba105ab0f5e41bd1af2b6c7aa285a5a4c555d7878fbef3a0432cccbb4e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:PMA3T7BDYMYEN4OWE4M2DYCXOX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development of position-sensitive time-of-flight spectrometer for fission fragment research","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. A. Hecht, A. Laptev, C.W. Arnold, D. M. Mader, D. W. Shields, F. Tovesson, G. Rusev, H. J. Jorgenson, K. Meierbachtol, M. Jandel, M. White, R. E. Blakeley, T. Bredeweg","submitted_at":"2014-03-06T20:57:15Z","abstract_excerpt":"A position-sensitive, high-resolution time-of-flight detector for fission fragments has been developed. The SPectrometer for Ion DEterminiation in fission Research (SPIDER) is a $2E-2v$ spectrometer designed to measure the mass of light fission fragments to a single mass unit. The time pick-off detector pairs to be used in SPIDER have been tested with $\\alpha$-particles from $^{229}$Th and its decay chain and $\\alpha$-particles and spontaneous fission fragments from $^{252}$Cf. Each detector module is comprised of a thin electron conversion foil, electrostatic mirror, microchannel plates, and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1573","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":"2026-05-18T01:44:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kaqugysu4rVYd6qtaU8AnIsIrzORI8dlG/ER1p/BmanTrcfLQfCHgjsgiAElo05dkbXi/IXAWVsJfQ0OzMpJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:43:02.084039Z"},"content_sha256":"15183d4cc987ef22939d3953d96e9e68004232f87c91d123e05c24289f5a58d5","schema_version":"1.0","event_id":"sha256:15183d4cc987ef22939d3953d96e9e68004232f87c91d123e05c24289f5a58d5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/bundle.json","state_url":"https://pith.science/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/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":"2026-05-25T14:43:02Z","links":{"resolver":"https://pith.science/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX","bundle":"https://pith.science/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/bundle.json","state":"https://pith.science/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PMA3T7BDYMYEN4OWE4M2DYCXOX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:PMA3T7BDYMYEN4OWE4M2DYCXOX","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":"f80700b6a053dcb3f154047fee1a5968bec5e63f7f5c1e3a94e77308bddf5af7","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-06T20:57:15Z","title_canon_sha256":"b149c8dd9442c0ea3994f3e211660782d8996366604ad436a3ae7f87b406ce9b"},"schema_version":"1.0","source":{"id":"1403.1573","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1573","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1573v1","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1573","created_at":"2026-05-18T01:44:18Z"},{"alias_kind":"pith_short_12","alias_value":"PMA3T7BDYMYE","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PMA3T7BDYMYEN4OW","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PMA3T7BD","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:15183d4cc987ef22939d3953d96e9e68004232f87c91d123e05c24289f5a58d5","target":"graph","created_at":"2026-05-18T01:44:18Z","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":"A position-sensitive, high-resolution time-of-flight detector for fission fragments has been developed. The SPectrometer for Ion DEterminiation in fission Research (SPIDER) is a $2E-2v$ spectrometer designed to measure the mass of light fission fragments to a single mass unit. The time pick-off detector pairs to be used in SPIDER have been tested with $\\alpha$-particles from $^{229}$Th and its decay chain and $\\alpha$-particles and spontaneous fission fragments from $^{252}$Cf. Each detector module is comprised of a thin electron conversion foil, electrostatic mirror, microchannel plates, and ","authors_text":"A. A. Hecht, A. Laptev, C.W. Arnold, D. M. Mader, D. W. Shields, F. Tovesson, G. Rusev, H. J. Jorgenson, K. Meierbachtol, M. Jandel, M. White, R. E. Blakeley, T. Bredeweg","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-06T20:57:15Z","title":"Development of position-sensitive time-of-flight spectrometer for fission fragment research"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1573","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:cec74ba105ab0f5e41bd1af2b6c7aa285a5a4c555d7878fbef3a0432cccbb4e1","target":"record","created_at":"2026-05-18T01:44:18Z","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":"f80700b6a053dcb3f154047fee1a5968bec5e63f7f5c1e3a94e77308bddf5af7","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-03-06T20:57:15Z","title_canon_sha256":"b149c8dd9442c0ea3994f3e211660782d8996366604ad436a3ae7f87b406ce9b"},"schema_version":"1.0","source":{"id":"1403.1573","kind":"arxiv","version":1}},"canonical_sha256":"7b01b9fc23c33046f1d62719a1e05775f5d4624a019a45d0ef95775161a3320e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b01b9fc23c33046f1d62719a1e05775f5d4624a019a45d0ef95775161a3320e","first_computed_at":"2026-05-18T01:44:18.791939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:18.791939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6scY4k0T2afhhl05bEAXuoZ1Mw4J+gOPsSqhNi2L92pwU0vEICjNiYXElsJqpv8pwQLYWUdY/PIExHCGyLRkBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:18.792590Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.1573","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cec74ba105ab0f5e41bd1af2b6c7aa285a5a4c555d7878fbef3a0432cccbb4e1","sha256:15183d4cc987ef22939d3953d96e9e68004232f87c91d123e05c24289f5a58d5"],"state_sha256":"d0fc0f5f7305912123f4cfd85b0911b9bd0f0faa6cbdaaf6bd8e24441fe01895"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cPAa5ZDrqRcZhwl89+4Ne1h9y8faGeqv7OBnGKyXkHfNYDrIBGT87g/kbYTr6913TiGLsx9f6aGCg7SjpPu8DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T14:43:02.086818Z","bundle_sha256":"b03ca267732eddebada96b5ead8e53867960e49191d0e021b35c9aa0fd90a872"}}