{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:3C2MMMAGRRFN74VZAVOS4TLBNS","short_pith_number":"pith:3C2MMMAG","canonical_record":{"source":{"id":"1807.07123","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-18T19:55:23Z","cross_cats_sorted":[],"title_canon_sha256":"2e60c11fd0d7520eed24521ff1ff72e01a7b8b2f4226534bc663d2cebabd20a0","abstract_canon_sha256":"d782dd4175d87324aa8a0bea537c6aa74c2a058990f5ad1d8f096366a27b2f8d"},"schema_version":"1.0"},"canonical_sha256":"d8b4c630068c4adff2b9055d2e4d616caea8c9bd57984ec0a0581de939b065ae","source":{"kind":"arxiv","id":"1807.07123","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.07123","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"arxiv_version","alias_value":"1807.07123v4","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07123","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"pith_short_12","alias_value":"3C2MMMAGRRFN","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3C2MMMAGRRFN74VZ","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3C2MMMAG","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:3C2MMMAGRRFN74VZAVOS4TLBNS","target":"record","payload":{"canonical_record":{"source":{"id":"1807.07123","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-18T19:55:23Z","cross_cats_sorted":[],"title_canon_sha256":"2e60c11fd0d7520eed24521ff1ff72e01a7b8b2f4226534bc663d2cebabd20a0","abstract_canon_sha256":"d782dd4175d87324aa8a0bea537c6aa74c2a058990f5ad1d8f096366a27b2f8d"},"schema_version":"1.0"},"canonical_sha256":"d8b4c630068c4adff2b9055d2e4d616caea8c9bd57984ec0a0581de939b065ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:33.604387Z","signature_b64":"A8w7tOY5e8eXPEkjXQPxwJ6qNwF4bqXnZt+Hdcf9vm55EECEq6phazv7lmqpkw0XAlBQcuVFIvTehfKjCGKqDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d8b4c630068c4adff2b9055d2e4d616caea8c9bd57984ec0a0581de939b065ae","last_reissued_at":"2026-05-17T23:51:33.603770Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:33.603770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.07123","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sLTlaIwKdXdBIcFwlvOP6eF1uLalb2MiRCTp8eHkSHYeOD/+t6hGprsxEYnDfAFVzJaEVI9B6ryrbXDUk80CBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:36:19.852031Z"},"content_sha256":"ca9801b47c78c9afd89c20f30c86a6c1e0559b311471effab7124059c600c788","schema_version":"1.0","event_id":"sha256:ca9801b47c78c9afd89c20f30c86a6c1e0559b311471effab7124059c600c788"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:3C2MMMAGRRFN74VZAVOS4TLBNS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An innovative technique for TPB deposition on convex window photomultiplier tubes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Falcone, A. Menegolli, A. Rappoldi, A. Zani, C. Montanari, G.L. Raselli, M. Bonesini, M.C. Prata, M. Nessi, M. Rossella, M. Spanu, M. Torti, R. Mazza, T. Cervi, U. Kose, W. Vollenberg","submitted_at":"2018-07-18T19:55:23Z","abstract_excerpt":"Tetraphenyl-butadiene (TPB) is an organic fluorescent chemical compound generally used as wavelength shifter thanks to its extremely high efficiency to convert ultra-violet photons into visible light. A common method to use TPB with detectors sensitive to visible light, such as photomultiplier tubes (PMTs), is to deposit thin layers on the device window. To obtain effective TPB layers, different procedures can be used. In this work a specific evaporation technique adopted to coat 8 in. convex windows photomultiplier tubes is presented. It consists in evaporating TPB by means of a Knudsen cell,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07123","kind":"arxiv","version":4},"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":"2026-05-17T23:51:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B6v4gDQADLbG0bA+UrwKGO3BSpkqJhA4yjHeFJPdwP6zRqzZL3RI6IiHp7CJCtIOcd9uB2cAHlWKoBTr1WRiCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:36:19.852801Z"},"content_sha256":"d5561ec04cfdf9f8f82ebfabcd770d0a0f582fbcc0c4fb4d6c68b3335cddeba7","schema_version":"1.0","event_id":"sha256:d5561ec04cfdf9f8f82ebfabcd770d0a0f582fbcc0c4fb4d6c68b3335cddeba7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/bundle.json","state_url":"https://pith.science/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/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":"2026-05-27T22:36:19Z","links":{"resolver":"https://pith.science/pith/3C2MMMAGRRFN74VZAVOS4TLBNS","bundle":"https://pith.science/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/bundle.json","state":"https://pith.science/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3C2MMMAGRRFN74VZAVOS4TLBNS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3C2MMMAGRRFN74VZAVOS4TLBNS","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":"d782dd4175d87324aa8a0bea537c6aa74c2a058990f5ad1d8f096366a27b2f8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-18T19:55:23Z","title_canon_sha256":"2e60c11fd0d7520eed24521ff1ff72e01a7b8b2f4226534bc663d2cebabd20a0"},"schema_version":"1.0","source":{"id":"1807.07123","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.07123","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"arxiv_version","alias_value":"1807.07123v4","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07123","created_at":"2026-05-17T23:51:33Z"},{"alias_kind":"pith_short_12","alias_value":"3C2MMMAGRRFN","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3C2MMMAGRRFN74VZ","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3C2MMMAG","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:d5561ec04cfdf9f8f82ebfabcd770d0a0f582fbcc0c4fb4d6c68b3335cddeba7","target":"graph","created_at":"2026-05-17T23:51:33Z","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":"Tetraphenyl-butadiene (TPB) is an organic fluorescent chemical compound generally used as wavelength shifter thanks to its extremely high efficiency to convert ultra-violet photons into visible light. A common method to use TPB with detectors sensitive to visible light, such as photomultiplier tubes (PMTs), is to deposit thin layers on the device window. To obtain effective TPB layers, different procedures can be used. In this work a specific evaporation technique adopted to coat 8 in. convex windows photomultiplier tubes is presented. It consists in evaporating TPB by means of a Knudsen cell,","authors_text":"A. Falcone, A. Menegolli, A. Rappoldi, A. Zani, C. Montanari, G.L. Raselli, M. Bonesini, M.C. Prata, M. Nessi, M. Rossella, M. Spanu, M. Torti, R. Mazza, T. Cervi, U. Kose, W. Vollenberg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-18T19:55:23Z","title":"An innovative technique for TPB deposition on convex window photomultiplier tubes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07123","kind":"arxiv","version":4},"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:ca9801b47c78c9afd89c20f30c86a6c1e0559b311471effab7124059c600c788","target":"record","created_at":"2026-05-17T23:51:33Z","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":"d782dd4175d87324aa8a0bea537c6aa74c2a058990f5ad1d8f096366a27b2f8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-07-18T19:55:23Z","title_canon_sha256":"2e60c11fd0d7520eed24521ff1ff72e01a7b8b2f4226534bc663d2cebabd20a0"},"schema_version":"1.0","source":{"id":"1807.07123","kind":"arxiv","version":4}},"canonical_sha256":"d8b4c630068c4adff2b9055d2e4d616caea8c9bd57984ec0a0581de939b065ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d8b4c630068c4adff2b9055d2e4d616caea8c9bd57984ec0a0581de939b065ae","first_computed_at":"2026-05-17T23:51:33.603770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:33.603770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A8w7tOY5e8eXPEkjXQPxwJ6qNwF4bqXnZt+Hdcf9vm55EECEq6phazv7lmqpkw0XAlBQcuVFIvTehfKjCGKqDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:33.604387Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.07123","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca9801b47c78c9afd89c20f30c86a6c1e0559b311471effab7124059c600c788","sha256:d5561ec04cfdf9f8f82ebfabcd770d0a0f582fbcc0c4fb4d6c68b3335cddeba7"],"state_sha256":"e47c5316887514947579aa5d70a01af7cb03dd0a18ec9848f4061d0bcba7dab1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xQT27e8ROO+eg0p7kmFHwv7OkheKuwGtoEjxJeuuGrIoSW12OsGJQiCridZ1l5lyZ70lNNrQZXTFVFsD40jCBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:36:19.856848Z","bundle_sha256":"d0e5739a23a7258385a44e83bfd2137278ffacc05ba1c02ceaf5c53d733ce73d"}}