{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:65KHK73KYZDIRK4ATPI57ATG7T","short_pith_number":"pith:65KHK73K","canonical_record":{"source":{"id":"1406.1607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-06-06T08:25:07Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"0e42adc3c93c89e479d4a7ff8899ec9dbe8502ae25603e937457c90676d4a3ce","abstract_canon_sha256":"5f5252cc592cf469d733009f5eee973d8da5d007e252cde23bf26e97bd7975a7"},"schema_version":"1.0"},"canonical_sha256":"f754757f6ac64688ab809bd1df8266fcfa0feddcc999dc838515a72518963bee","source":{"kind":"arxiv","id":"1406.1607","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.1607","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"arxiv_version","alias_value":"1406.1607v1","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1607","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"pith_short_12","alias_value":"65KHK73KYZDI","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"65KHK73KYZDIRK4A","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"65KHK73K","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:65KHK73KYZDIRK4ATPI57ATG7T","target":"record","payload":{"canonical_record":{"source":{"id":"1406.1607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-06-06T08:25:07Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"0e42adc3c93c89e479d4a7ff8899ec9dbe8502ae25603e937457c90676d4a3ce","abstract_canon_sha256":"5f5252cc592cf469d733009f5eee973d8da5d007e252cde23bf26e97bd7975a7"},"schema_version":"1.0"},"canonical_sha256":"f754757f6ac64688ab809bd1df8266fcfa0feddcc999dc838515a72518963bee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:22.085893Z","signature_b64":"mvqOwmrGs62lXFy8xQOG/M3eS/PH3fHlr/mD8lcrhGVjsoYv288v2zV9LOrwt3U3hA6DRgwU+m7JUYkzd0DDAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f754757f6ac64688ab809bd1df8266fcfa0feddcc999dc838515a72518963bee","last_reissued_at":"2026-05-18T02:50:22.085256Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:22.085256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.1607","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":"2026-05-18T02:50:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yENZZhte3y69l+0sQRuAFeYDsv/UwiDYoftDD5AeXEpP6GLVyuhaoLPDDxHFZy0jOK1pWCa0391HpmCgOTtaBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T07:21:32.697039Z"},"content_sha256":"812dcc322accb488f15ce9c38fd450e5da9f42bffb76e2282729560f7f6a29c6","schema_version":"1.0","event_id":"sha256:812dcc322accb488f15ce9c38fd450e5da9f42bffb76e2282729560f7f6a29c6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:65KHK73KYZDIRK4ATPI57ATG7T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Design and performance of a vacuum-UV simulator for material testing under space conditions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.space-ph"],"primary_cat":"physics.ins-det","authors_text":"Andreas Witzke, Maciej Sznajder, Reiner Thornagel, Thomas Renger, Ulrich Geppert","submitted_at":"2014-06-06T08:25:07Z","abstract_excerpt":"This paper describes the construction and performance of a VUV-simulator that has been designed to study degradation of materials under space conditions. It is part of the Complex Irradiation Facility at DLR in Bremen, Germany, that has been built for testing of material under irradiation in the complete UV-range as well as under proton and electron irradiation. Presently available UV-sources used for material tests do not allow the irradiation with wavelengths smaller than about $115$ nm where common Deuterium lamps show an intensity cut-off. The VUV-simulator generates radiation by excitatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1607","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":"2026-05-18T02:50:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6JVTk2o+Mx5DgYJd9c8S16Ntq8PAGjhAeZUDBtY2cyTTR8HedPQnORz3jb4/qgWlqvussu4CXQsgPnhikgcKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T07:21:32.697642Z"},"content_sha256":"74aa59422c477d382e8f25708aae0cd38f40530e18c80a060bbbf2a55ab9fdff","schema_version":"1.0","event_id":"sha256:74aa59422c477d382e8f25708aae0cd38f40530e18c80a060bbbf2a55ab9fdff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/65KHK73KYZDIRK4ATPI57ATG7T/bundle.json","state_url":"https://pith.science/pith/65KHK73KYZDIRK4ATPI57ATG7T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/65KHK73KYZDIRK4ATPI57ATG7T/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":"2026-05-25T07:21:32Z","links":{"resolver":"https://pith.science/pith/65KHK73KYZDIRK4ATPI57ATG7T","bundle":"https://pith.science/pith/65KHK73KYZDIRK4ATPI57ATG7T/bundle.json","state":"https://pith.science/pith/65KHK73KYZDIRK4ATPI57ATG7T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/65KHK73KYZDIRK4ATPI57ATG7T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:65KHK73KYZDIRK4ATPI57ATG7T","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":"5f5252cc592cf469d733009f5eee973d8da5d007e252cde23bf26e97bd7975a7","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-06-06T08:25:07Z","title_canon_sha256":"0e42adc3c93c89e479d4a7ff8899ec9dbe8502ae25603e937457c90676d4a3ce"},"schema_version":"1.0","source":{"id":"1406.1607","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.1607","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"arxiv_version","alias_value":"1406.1607v1","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1607","created_at":"2026-05-18T02:50:22Z"},{"alias_kind":"pith_short_12","alias_value":"65KHK73KYZDI","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"65KHK73KYZDIRK4A","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"65KHK73K","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:74aa59422c477d382e8f25708aae0cd38f40530e18c80a060bbbf2a55ab9fdff","target":"graph","created_at":"2026-05-18T02:50:22Z","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":"This paper describes the construction and performance of a VUV-simulator that has been designed to study degradation of materials under space conditions. It is part of the Complex Irradiation Facility at DLR in Bremen, Germany, that has been built for testing of material under irradiation in the complete UV-range as well as under proton and electron irradiation. Presently available UV-sources used for material tests do not allow the irradiation with wavelengths smaller than about $115$ nm where common Deuterium lamps show an intensity cut-off. The VUV-simulator generates radiation by excitatio","authors_text":"Andreas Witzke, Maciej Sznajder, Reiner Thornagel, Thomas Renger, Ulrich Geppert","cross_cats":["physics.space-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-06-06T08:25:07Z","title":"Design and performance of a vacuum-UV simulator for material testing under space conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1607","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":"sha256:812dcc322accb488f15ce9c38fd450e5da9f42bffb76e2282729560f7f6a29c6","target":"record","created_at":"2026-05-18T02:50:22Z","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":"5f5252cc592cf469d733009f5eee973d8da5d007e252cde23bf26e97bd7975a7","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-06-06T08:25:07Z","title_canon_sha256":"0e42adc3c93c89e479d4a7ff8899ec9dbe8502ae25603e937457c90676d4a3ce"},"schema_version":"1.0","source":{"id":"1406.1607","kind":"arxiv","version":1}},"canonical_sha256":"f754757f6ac64688ab809bd1df8266fcfa0feddcc999dc838515a72518963bee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f754757f6ac64688ab809bd1df8266fcfa0feddcc999dc838515a72518963bee","first_computed_at":"2026-05-18T02:50:22.085256Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:22.085256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mvqOwmrGs62lXFy8xQOG/M3eS/PH3fHlr/mD8lcrhGVjsoYv288v2zV9LOrwt3U3hA6DRgwU+m7JUYkzd0DDAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:22.085893Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.1607","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:812dcc322accb488f15ce9c38fd450e5da9f42bffb76e2282729560f7f6a29c6","sha256:74aa59422c477d382e8f25708aae0cd38f40530e18c80a060bbbf2a55ab9fdff"],"state_sha256":"9dc75139f286cd7f25b6c9b46ecc9b04ec1fca85722d6599aebaebed5563ff1a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z5Mh0nZpxA3qLGzVxLe/vTsIheGyvMdjAVBl10Rg13EQk4IT7U+3nFhfQko0PtABTJ50BfTJTWtO8ePNsKlbCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T07:21:32.700910Z","bundle_sha256":"e3ab8a3485c15fdbe372437a011c6c8c87a128b9e85daf7a1ba055321de4e7dd"}}