{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LRUFWMM5MRIED72TMAALIUMQY2","short_pith_number":"pith:LRUFWMM5","canonical_record":{"source":{"id":"1906.07237","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-17T19:46:37Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"66565f3ed5ead949f60c203ef4590df5efd81d659f9396cfa20b2ef67046468f","abstract_canon_sha256":"1a6f1f2511ec2f58d902cb14b75b6bb6a6b6345844b5e50981591c939a786518"},"schema_version":"1.0"},"canonical_sha256":"5c685b319d645041ff536000b45190c6b8ede65c868e4a58977a3d339864667f","source":{"kind":"arxiv","id":"1906.07237","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07237","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07237v1","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07237","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"pith_short_12","alias_value":"LRUFWMM5MRIE","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LRUFWMM5MRIED72T","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LRUFWMM5","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LRUFWMM5MRIED72TMAALIUMQY2","target":"record","payload":{"canonical_record":{"source":{"id":"1906.07237","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-17T19:46:37Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"66565f3ed5ead949f60c203ef4590df5efd81d659f9396cfa20b2ef67046468f","abstract_canon_sha256":"1a6f1f2511ec2f58d902cb14b75b6bb6a6b6345844b5e50981591c939a786518"},"schema_version":"1.0"},"canonical_sha256":"5c685b319d645041ff536000b45190c6b8ede65c868e4a58977a3d339864667f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:08.475388Z","signature_b64":"M3nVvr7Piw71XDn+6BGgsm8K8Pk+WeDQIg4RTH01H3kF+ADJrukMhP35lqYq4sQMtYoXTVDBh7kRCBeuiheEAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c685b319d645041ff536000b45190c6b8ede65c868e4a58977a3d339864667f","last_reissued_at":"2026-05-17T23:43:08.474787Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:08.474787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.07237","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":"2026-05-17T23:43:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5VavA/4ctHjFIlhYizXjl4WmspOrmR0ZApnKOlclN2GkmLAELRVMw91hrSr3kkrRiZ0ZipcyMCQr2z+e7676Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:12:19.871917Z"},"content_sha256":"6123bd4cab8e9973e45062a1b827f004dda7d1a0cd5ee67e3914499909861280","schema_version":"1.0","event_id":"sha256:6123bd4cab8e9973e45062a1b827f004dda7d1a0cd5ee67e3914499909861280"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LRUFWMM5MRIED72TMAALIUMQY2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radiation Tests of Hamamatsu Multi-Pixel Photon Counters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"(2) Fermi National Accelerator Laboratory (3) University of Virginia, (4) Northwestern Medicine Proton Center), A. Dyshkant (1), E. C. Dukes (3), G. Blazey (1), J. Colston (1), J. Kalnins (1), K. Francis (1), M. Pankuch (4) ((1) Department of Physics, Northern Illinois University, P. Rubinov (2), S. A. Uzunyan (1), S. Hansen (2), V. Zutshi (1), Y. Oksuzian (3)","submitted_at":"2019-06-17T19:46:37Z","abstract_excerpt":"Results of radiation tests of Hamamatsu 2.0 x 2.0~mm2 through-silicon-via (S13360-2050VE) multi-pixel photon counters, or MPPCs [1], are presented. Distinct sets of eight MPPCs were exposed to four different 1~MeV neutron equivalent doses of 200 MeV protons. Measurements of the breakdown voltage, gain and noise rates at different bias overvoltages, photoelectron thresholds, and LED illumination levels were taken before and after irradiation. No significant deterioration in performance was observed for breakdown voltage, gain, and response. Noise rates increased significantly with irradiation. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07237","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":"2026-05-17T23:43:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Al4SDzhcDgYS+KisdO+gfGGzWBNgGTpX9cICe9oX9N/Db1k8rZ9FbvivqvzLocBcl7x6Gm5Ib30RpkEfv2+7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:12:19.872721Z"},"content_sha256":"6a3afe9dc50a98b66fc18ac9cd91239ff3b2f605b94b65e108409ae1d2aa761c","schema_version":"1.0","event_id":"sha256:6a3afe9dc50a98b66fc18ac9cd91239ff3b2f605b94b65e108409ae1d2aa761c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LRUFWMM5MRIED72TMAALIUMQY2/bundle.json","state_url":"https://pith.science/pith/LRUFWMM5MRIED72TMAALIUMQY2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LRUFWMM5MRIED72TMAALIUMQY2/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":"2026-05-31T01:12:19Z","links":{"resolver":"https://pith.science/pith/LRUFWMM5MRIED72TMAALIUMQY2","bundle":"https://pith.science/pith/LRUFWMM5MRIED72TMAALIUMQY2/bundle.json","state":"https://pith.science/pith/LRUFWMM5MRIED72TMAALIUMQY2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LRUFWMM5MRIED72TMAALIUMQY2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LRUFWMM5MRIED72TMAALIUMQY2","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":"1a6f1f2511ec2f58d902cb14b75b6bb6a6b6345844b5e50981591c939a786518","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-17T19:46:37Z","title_canon_sha256":"66565f3ed5ead949f60c203ef4590df5efd81d659f9396cfa20b2ef67046468f"},"schema_version":"1.0","source":{"id":"1906.07237","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07237","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07237v1","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07237","created_at":"2026-05-17T23:43:08Z"},{"alias_kind":"pith_short_12","alias_value":"LRUFWMM5MRIE","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LRUFWMM5MRIED72T","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LRUFWMM5","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:6a3afe9dc50a98b66fc18ac9cd91239ff3b2f605b94b65e108409ae1d2aa761c","target":"graph","created_at":"2026-05-17T23:43:08Z","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":"Results of radiation tests of Hamamatsu 2.0 x 2.0~mm2 through-silicon-via (S13360-2050VE) multi-pixel photon counters, or MPPCs [1], are presented. Distinct sets of eight MPPCs were exposed to four different 1~MeV neutron equivalent doses of 200 MeV protons. Measurements of the breakdown voltage, gain and noise rates at different bias overvoltages, photoelectron thresholds, and LED illumination levels were taken before and after irradiation. No significant deterioration in performance was observed for breakdown voltage, gain, and response. Noise rates increased significantly with irradiation. ","authors_text":"(2) Fermi National Accelerator Laboratory (3) University of Virginia, (4) Northwestern Medicine Proton Center), A. Dyshkant (1), E. C. Dukes (3), G. Blazey (1), J. Colston (1), J. Kalnins (1), K. Francis (1), M. Pankuch (4) ((1) Department of Physics, Northern Illinois University, P. Rubinov (2), S. A. Uzunyan (1), S. Hansen (2), V. Zutshi (1), Y. Oksuzian (3)","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-17T19:46:37Z","title":"Radiation Tests of Hamamatsu Multi-Pixel Photon Counters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07237","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":"sha256:6123bd4cab8e9973e45062a1b827f004dda7d1a0cd5ee67e3914499909861280","target":"record","created_at":"2026-05-17T23:43:08Z","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":"1a6f1f2511ec2f58d902cb14b75b6bb6a6b6345844b5e50981591c939a786518","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-17T19:46:37Z","title_canon_sha256":"66565f3ed5ead949f60c203ef4590df5efd81d659f9396cfa20b2ef67046468f"},"schema_version":"1.0","source":{"id":"1906.07237","kind":"arxiv","version":1}},"canonical_sha256":"5c685b319d645041ff536000b45190c6b8ede65c868e4a58977a3d339864667f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c685b319d645041ff536000b45190c6b8ede65c868e4a58977a3d339864667f","first_computed_at":"2026-05-17T23:43:08.474787Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:08.474787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M3nVvr7Piw71XDn+6BGgsm8K8Pk+WeDQIg4RTH01H3kF+ADJrukMhP35lqYq4sQMtYoXTVDBh7kRCBeuiheEAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:08.475388Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.07237","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6123bd4cab8e9973e45062a1b827f004dda7d1a0cd5ee67e3914499909861280","sha256:6a3afe9dc50a98b66fc18ac9cd91239ff3b2f605b94b65e108409ae1d2aa761c"],"state_sha256":"001faacf7cdf25b0ed263a44d5b184d0c1cdc669207e1ed9e261249c61e5eb25"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y/OifYdF2HUqOu1V2/dWqVZCo2IQocVsP7qcGta8S5wIOJctRACoD1QPyBGGfHxqPdPLd3sIAWsOKMrjB3lYCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T01:12:19.880160Z","bundle_sha256":"000322c34e35296efce1ee34210c77967e7fe961aa11ead94da2742776345890"}}