{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FB7CF25JQRYEQMMNWYJP7MOCSP","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":"1cd471b8c8fe72e25d1ee669420654da23632063b4075101fec63a04aaa00b95","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-06-28T10:04:52Z","title_canon_sha256":"a56e77fb4c3b06c98aa6e160b3b53ed8688c63d97c2cbac6be443ebf937dbf7b"},"schema_version":"1.0","source":{"id":"1306.6773","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.6773","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"arxiv_version","alias_value":"1306.6773v1","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.6773","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"pith_short_12","alias_value":"FB7CF25JQRYE","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FB7CF25JQRYEQMMN","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FB7CF25J","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:13f7343379cdbc502383d74a6dde6122b9de3951113b9b281a630d3cb42b0ddc","target":"graph","created_at":"2026-05-18T01:49:06Z","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":"Silicon avalanche photodiodes (APDs) are sensitive to operating temperature fluctuations and are also susceptible to radiation flux expected in satellite-based quantum experiments. We introduce a low power voltage adjusting mechanism to overcome the effects of in-orbit temperature fluctuations. We also present data on the performance of Si APDs after irradiation (gamma-ray and proton beam). Combined with an analysis of expected orbital irradiation, we propose that a Si APD in a 400 km equatorial orbit may operate beyond the lifetime of the satellite.","authors_text":"Alexander Ling, Cliff Cheng, Rakhitha Chandrasekara, Yue Chuan Tan","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-06-28T10:04:52Z","title":"Silicon avalanche photodiode operation and lifetime analysis for small satellites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.6773","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":"sha256:4a82d5f98a6d767c9e9c1e5dcca09ae5353a62dfe0abbefef7d7c4b596c23140","target":"record","created_at":"2026-05-18T01:49:06Z","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":"1cd471b8c8fe72e25d1ee669420654da23632063b4075101fec63a04aaa00b95","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-06-28T10:04:52Z","title_canon_sha256":"a56e77fb4c3b06c98aa6e160b3b53ed8688c63d97c2cbac6be443ebf937dbf7b"},"schema_version":"1.0","source":{"id":"1306.6773","kind":"arxiv","version":1}},"canonical_sha256":"287e22eba9847048318db612ffb1c293f546080443fbdda747e5c2a230518a17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"287e22eba9847048318db612ffb1c293f546080443fbdda747e5c2a230518a17","first_computed_at":"2026-05-18T01:49:06.660285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:06.660285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zcBwFEx/W1zc2VrETpiqpV7dv/xJSRWOmyHP1H1RI5b0SESzCcgtfHABOWv756JAGbNW4ZZwWuL+wkRl4io3Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:06.660709Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.6773","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a82d5f98a6d767c9e9c1e5dcca09ae5353a62dfe0abbefef7d7c4b596c23140","sha256:13f7343379cdbc502383d74a6dde6122b9de3951113b9b281a630d3cb42b0ddc"],"state_sha256":"168e812538943ba532953eac0bda2bf6febf43322aaf6e4490218a9ca03c7674"}