{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QMGSFMC5PDKXJRIWKSOZV35QCD","short_pith_number":"pith:QMGSFMC5","canonical_record":{"source":{"id":"1507.00607","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-02T14:45:40Z","cross_cats_sorted":[],"title_canon_sha256":"f3fbf126253da29c8cdae46e48454108e733ac4c1e5cd54205bb60e02624f1e6","abstract_canon_sha256":"594d26cc37518f7a993a0cf0f2c95e2b2a27ec36d9c09dd2cd5689e6031dd920"},"schema_version":"1.0"},"canonical_sha256":"830d22b05d78d574c516549d9aefb010cdc4f3ef8a8962b16cbfdeaafae68876","source":{"kind":"arxiv","id":"1507.00607","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00607","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00607v2","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00607","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"pith_short_12","alias_value":"QMGSFMC5PDKX","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QMGSFMC5PDKXJRIW","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QMGSFMC5","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QMGSFMC5PDKXJRIWKSOZV35QCD","target":"record","payload":{"canonical_record":{"source":{"id":"1507.00607","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-02T14:45:40Z","cross_cats_sorted":[],"title_canon_sha256":"f3fbf126253da29c8cdae46e48454108e733ac4c1e5cd54205bb60e02624f1e6","abstract_canon_sha256":"594d26cc37518f7a993a0cf0f2c95e2b2a27ec36d9c09dd2cd5689e6031dd920"},"schema_version":"1.0"},"canonical_sha256":"830d22b05d78d574c516549d9aefb010cdc4f3ef8a8962b16cbfdeaafae68876","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:28:54.249153Z","signature_b64":"G0y+FBPz3qnQLEmLFzDtZ1TLjULIcVXWPt2uAoTxZOAGRFnalwiJUh86RD+SUNidpOnb/a6d4bngyKsD5fUFAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"830d22b05d78d574c516549d9aefb010cdc4f3ef8a8962b16cbfdeaafae68876","last_reissued_at":"2026-05-18T01:28:54.248213Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:28:54.248213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.00607","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:28:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4TXlarmrBC2qLc1jy28v0us3v6F74xeH5xzSoYoL1EpP/FPtO80FJ2QO/YIYgwEu/pKSSiW2YbZ58nm55Xb9Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:59:39.928481Z"},"content_sha256":"25e55d639f403b49bbc1ae00a2d30beda7803c5d4a7bacf838ceb747ae581490","schema_version":"1.0","event_id":"sha256:25e55d639f403b49bbc1ae00a2d30beda7803c5d4a7bacf838ceb747ae581490"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QMGSFMC5PDKXJRIWKSOZV35QCD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Investigation of background in large-area neutron detectors due to alpha emission from impurities in aluminium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Khaplanov, B. Guerard, C. H\\\"oglund, F. Piscitelli, J. Birch, J.-C. Buffet, J.-F. Clergeau, J. Jensen, L. Hultman, M. Ferraton, P. van Esch, R. Hall-Wilton","submitted_at":"2015-07-02T14:45:40Z","abstract_excerpt":"Thermal neutron detector based on films of $^{10}$B$_4$C have been developed as an alternative to $^3$He detectors. In particular, The Multi-Grid detector concept is considered for future large area detectors for ESS and ILL instruments. An excellent signal-to-background ratio is essential to attain expected scientific results. Aluminium is the most natural material for the mechanical structure of of the Multi-Grid detector and other similar concepts due to its mechanical and neutronic properties. Due to natural concentration of $\\alpha$ emitters, however, the background from $\\alpha$ particle"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00607","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:28:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ClXJxvwjexPaNhwQ+qy+INH3gAQwfypPhQrRD6ex/plXURXXXxQtwd1ZI5jD67oGReWlN0LQs9dzGG/vBsWrCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:59:39.928838Z"},"content_sha256":"03ca034b062ca4bd96a5d0fc1d2c05b2a19e9628bbfacdd806103e5e1c7a80ec","schema_version":"1.0","event_id":"sha256:03ca034b062ca4bd96a5d0fc1d2c05b2a19e9628bbfacdd806103e5e1c7a80ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/bundle.json","state_url":"https://pith.science/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/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":"2026-06-02T16:59:39Z","links":{"resolver":"https://pith.science/pith/QMGSFMC5PDKXJRIWKSOZV35QCD","bundle":"https://pith.science/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/bundle.json","state":"https://pith.science/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QMGSFMC5PDKXJRIWKSOZV35QCD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QMGSFMC5PDKXJRIWKSOZV35QCD","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":"594d26cc37518f7a993a0cf0f2c95e2b2a27ec36d9c09dd2cd5689e6031dd920","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-02T14:45:40Z","title_canon_sha256":"f3fbf126253da29c8cdae46e48454108e733ac4c1e5cd54205bb60e02624f1e6"},"schema_version":"1.0","source":{"id":"1507.00607","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00607","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00607v2","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00607","created_at":"2026-05-18T01:28:54Z"},{"alias_kind":"pith_short_12","alias_value":"QMGSFMC5PDKX","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QMGSFMC5PDKXJRIW","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QMGSFMC5","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:03ca034b062ca4bd96a5d0fc1d2c05b2a19e9628bbfacdd806103e5e1c7a80ec","target":"graph","created_at":"2026-05-18T01:28:54Z","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":"Thermal neutron detector based on films of $^{10}$B$_4$C have been developed as an alternative to $^3$He detectors. In particular, The Multi-Grid detector concept is considered for future large area detectors for ESS and ILL instruments. An excellent signal-to-background ratio is essential to attain expected scientific results. Aluminium is the most natural material for the mechanical structure of of the Multi-Grid detector and other similar concepts due to its mechanical and neutronic properties. Due to natural concentration of $\\alpha$ emitters, however, the background from $\\alpha$ particle","authors_text":"A. Khaplanov, B. Guerard, C. H\\\"oglund, F. Piscitelli, J. Birch, J.-C. Buffet, J.-F. Clergeau, J. Jensen, L. Hultman, M. Ferraton, P. van Esch, R. Hall-Wilton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-02T14:45:40Z","title":"Investigation of background in large-area neutron detectors due to alpha emission from impurities in aluminium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00607","kind":"arxiv","version":2},"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":"sha256:25e55d639f403b49bbc1ae00a2d30beda7803c5d4a7bacf838ceb747ae581490","target":"record","created_at":"2026-05-18T01:28:54Z","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":"594d26cc37518f7a993a0cf0f2c95e2b2a27ec36d9c09dd2cd5689e6031dd920","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-07-02T14:45:40Z","title_canon_sha256":"f3fbf126253da29c8cdae46e48454108e733ac4c1e5cd54205bb60e02624f1e6"},"schema_version":"1.0","source":{"id":"1507.00607","kind":"arxiv","version":2}},"canonical_sha256":"830d22b05d78d574c516549d9aefb010cdc4f3ef8a8962b16cbfdeaafae68876","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"830d22b05d78d574c516549d9aefb010cdc4f3ef8a8962b16cbfdeaafae68876","first_computed_at":"2026-05-18T01:28:54.248213Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:28:54.248213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G0y+FBPz3qnQLEmLFzDtZ1TLjULIcVXWPt2uAoTxZOAGRFnalwiJUh86RD+SUNidpOnb/a6d4bngyKsD5fUFAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:28:54.249153Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.00607","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25e55d639f403b49bbc1ae00a2d30beda7803c5d4a7bacf838ceb747ae581490","sha256:03ca034b062ca4bd96a5d0fc1d2c05b2a19e9628bbfacdd806103e5e1c7a80ec"],"state_sha256":"d94f945088ce31662d6c3b1b1b4ebcf63c0709405c9a8f543d1ffb4bbbcd4251"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vjI94VcH5i2AWcfUG0KthYvSvqdBiDhpWY3/W8CgB1/zywioNkgl8WzuLTfTnL3Bgj1cJKBdDm6rvAPwMCKcAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T16:59:39.930865Z","bundle_sha256":"457efe17df3f10078268e54831ccf3d1187a44c46a0e7ff816ffbac83c5cdd8e"}}