{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:EUJZ3R2UGLDE5WLP5RS23FOKXX","short_pith_number":"pith:EUJZ3R2U","canonical_record":{"source":{"id":"1002.1734","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2010-02-08T22:41:06Z","cross_cats_sorted":[],"title_canon_sha256":"64f7cf8ceaef743c3c86d7eab062a464c40cd0f1ca0f1b77c4c520f3178530b6","abstract_canon_sha256":"72e64f12f563bd84a4f733efdf1b1f33f398614effbc7f2335a686efafaa5957"},"schema_version":"1.0"},"canonical_sha256":"25139dc75432c64ed96fec65ad95cabdc4e613f0c94e325a84067c2cf6e5b9f6","source":{"kind":"arxiv","id":"1002.1734","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1734","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1734v1","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1734","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"pith_short_12","alias_value":"EUJZ3R2UGLDE","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"EUJZ3R2UGLDE5WLP","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"EUJZ3R2U","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:EUJZ3R2UGLDE5WLP5RS23FOKXX","target":"record","payload":{"canonical_record":{"source":{"id":"1002.1734","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2010-02-08T22:41:06Z","cross_cats_sorted":[],"title_canon_sha256":"64f7cf8ceaef743c3c86d7eab062a464c40cd0f1ca0f1b77c4c520f3178530b6","abstract_canon_sha256":"72e64f12f563bd84a4f733efdf1b1f33f398614effbc7f2335a686efafaa5957"},"schema_version":"1.0"},"canonical_sha256":"25139dc75432c64ed96fec65ad95cabdc4e613f0c94e325a84067c2cf6e5b9f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:11.077670Z","signature_b64":"5G/LqdAVfoM++WnDoc6Xo67o9JIspnzBJIxty4wKeYFlZ95g7jQKprgWw2U9GfoSrjF5d7uOEeqmI5HAHeLmBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25139dc75432c64ed96fec65ad95cabdc4e613f0c94e325a84067c2cf6e5b9f6","last_reissued_at":"2026-05-18T02:09:11.076936Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:11.076936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.1734","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":"2026-05-18T02:09:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4dU0XG0WwCddC2mkbGaYuld9aAxW8DSJGfGdIwP4BNd1MM7CxnTJY2cuEUstr9bSZ+C5HX7NqViiira7R4UoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:04:16.480575Z"},"content_sha256":"6ad6cf66ad01cf38671b4bd6be1288c470665964e82cff61476bb6cf466aaf53","schema_version":"1.0","event_id":"sha256:6ad6cf66ad01cf38671b4bd6be1288c470665964e82cff61476bb6cf466aaf53"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:EUJZ3R2UGLDE5WLP5RS23FOKXX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nanoradian angular stabilization of x-ray optical components","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Frank Lenkszus, Kurt Goetze, Kwang-Je Kim, Robert Laird, Stanislav Stoupin, Yuri Shvyd'ko","submitted_at":"2010-02-08T22:41:06Z","abstract_excerpt":"An x-ray free electron laser oscillator (XFELO) has been recently proposed [K. Kim, Y. Shvyd'ko, and S. Reiche, Phys. Rev. Lett. 100, 244802 (2008)]. Angular orientation and position in space of Bragg mirrors of the XFELO optical cavity must be continuously adjusted to compensate instabilities and maximize the output intensity. An angular stability of about 10 nrad (rms) is required [K. Kim and Y. Shvyd'ko Phys. Rev. STAB 12, 030703 (2009)]. To approach this goal, a feedback loop based on a null-detection principle was designed and used for stabilization of a high energy resolution x-ray monoc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1734","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":"2026-05-18T02:09:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qu52M4b5N8OABxPOCvmPxS+Hdwg3lorm0pYI6kV+0pbjB9/XflJUv+H2nn86+SkrQJfu8nM5rfnc3tjvUuuxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:04:16.481282Z"},"content_sha256":"b48c7914850bd7429e6632222d1522a3c6b531f677d8b88ab9bcfeb350be2b4a","schema_version":"1.0","event_id":"sha256:b48c7914850bd7429e6632222d1522a3c6b531f677d8b88ab9bcfeb350be2b4a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/bundle.json","state_url":"https://pith.science/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/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":"2026-05-26T11:04:16Z","links":{"resolver":"https://pith.science/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX","bundle":"https://pith.science/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/bundle.json","state":"https://pith.science/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EUJZ3R2UGLDE5WLP5RS23FOKXX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:EUJZ3R2UGLDE5WLP5RS23FOKXX","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":"72e64f12f563bd84a4f733efdf1b1f33f398614effbc7f2335a686efafaa5957","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2010-02-08T22:41:06Z","title_canon_sha256":"64f7cf8ceaef743c3c86d7eab062a464c40cd0f1ca0f1b77c4c520f3178530b6"},"schema_version":"1.0","source":{"id":"1002.1734","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1734","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1734v1","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1734","created_at":"2026-05-18T02:09:11Z"},{"alias_kind":"pith_short_12","alias_value":"EUJZ3R2UGLDE","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"EUJZ3R2UGLDE5WLP","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"EUJZ3R2U","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:b48c7914850bd7429e6632222d1522a3c6b531f677d8b88ab9bcfeb350be2b4a","target":"graph","created_at":"2026-05-18T02:09:11Z","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":"An x-ray free electron laser oscillator (XFELO) has been recently proposed [K. Kim, Y. Shvyd'ko, and S. Reiche, Phys. Rev. Lett. 100, 244802 (2008)]. Angular orientation and position in space of Bragg mirrors of the XFELO optical cavity must be continuously adjusted to compensate instabilities and maximize the output intensity. An angular stability of about 10 nrad (rms) is required [K. Kim and Y. Shvyd'ko Phys. Rev. STAB 12, 030703 (2009)]. To approach this goal, a feedback loop based on a null-detection principle was designed and used for stabilization of a high energy resolution x-ray monoc","authors_text":"Frank Lenkszus, Kurt Goetze, Kwang-Je Kim, Robert Laird, Stanislav Stoupin, Yuri Shvyd'ko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2010-02-08T22:41:06Z","title":"Nanoradian angular stabilization of x-ray optical components"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1734","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":"sha256:6ad6cf66ad01cf38671b4bd6be1288c470665964e82cff61476bb6cf466aaf53","target":"record","created_at":"2026-05-18T02:09:11Z","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":"72e64f12f563bd84a4f733efdf1b1f33f398614effbc7f2335a686efafaa5957","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2010-02-08T22:41:06Z","title_canon_sha256":"64f7cf8ceaef743c3c86d7eab062a464c40cd0f1ca0f1b77c4c520f3178530b6"},"schema_version":"1.0","source":{"id":"1002.1734","kind":"arxiv","version":1}},"canonical_sha256":"25139dc75432c64ed96fec65ad95cabdc4e613f0c94e325a84067c2cf6e5b9f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25139dc75432c64ed96fec65ad95cabdc4e613f0c94e325a84067c2cf6e5b9f6","first_computed_at":"2026-05-18T02:09:11.076936Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:11.076936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5G/LqdAVfoM++WnDoc6Xo67o9JIspnzBJIxty4wKeYFlZ95g7jQKprgWw2U9GfoSrjF5d7uOEeqmI5HAHeLmBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:11.077670Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.1734","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6ad6cf66ad01cf38671b4bd6be1288c470665964e82cff61476bb6cf466aaf53","sha256:b48c7914850bd7429e6632222d1522a3c6b531f677d8b88ab9bcfeb350be2b4a"],"state_sha256":"ddaf116877d655a7d317b3b427eac3c76cd3a3ca4848cd4541bc7ba59c82ffb4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RkZ3O19D3VkC+pMGP1JD5CfvdA1+XJNx0kdEcEmwgcCoigkxvwjNSrFC9nW4po3pO9OmTjIPfsetgPWDs9KeBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:04:16.484867Z","bundle_sha256":"0954451d518862935b653dcd6bd02352234019fab8e3b089f1fade1525558a1d"}}