{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:23WDSMYH6RFKE36EK4J2KGBPSW","short_pith_number":"pith:23WDSMYH","canonical_record":{"source":{"id":"1806.09247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-06-25T01:45:47Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"9dd00e7a45d0cc101dea045c3af50106e5794fa599cab475f7dd12448df65b07","abstract_canon_sha256":"0d89dcf6e02e0da09849db7296ca7bd604146cbf1af9136b3379139034625bb9"},"schema_version":"1.0"},"canonical_sha256":"d6ec393307f44aa26fc45713a5182f958933a7a6878b7e2fb9ce7db647e09cbb","source":{"kind":"arxiv","id":"1806.09247","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.09247","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"arxiv_version","alias_value":"1806.09247v1","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.09247","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"pith_short_12","alias_value":"23WDSMYH6RFK","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"23WDSMYH6RFKE36E","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"23WDSMYH","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:23WDSMYH6RFKE36EK4J2KGBPSW","target":"record","payload":{"canonical_record":{"source":{"id":"1806.09247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-06-25T01:45:47Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"9dd00e7a45d0cc101dea045c3af50106e5794fa599cab475f7dd12448df65b07","abstract_canon_sha256":"0d89dcf6e02e0da09849db7296ca7bd604146cbf1af9136b3379139034625bb9"},"schema_version":"1.0"},"canonical_sha256":"d6ec393307f44aa26fc45713a5182f958933a7a6878b7e2fb9ce7db647e09cbb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:29.891009Z","signature_b64":"ptYloK2hTEsRqwcwrz6lq+tM4n6L8EbrEE5AXa6rCUpqNpi7+KPTlDgY5LAL+5OtVJ9zWP6MSdC2snfD2mBACw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6ec393307f44aa26fc45713a5182f958933a7a6878b7e2fb9ce7db647e09cbb","last_reissued_at":"2026-05-18T00:12:29.890324Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:29.890324Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.09247","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":"2026-05-18T00:12:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9yHo7AcF9YHvtwrDXOPrMC9w88ALPqIdlx9QXprq10KAoaNkn9wUs3V86E8/2HWk/QChYRsQ1TtrNrRHhMAACg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T23:23:25.182569Z"},"content_sha256":"fdb9cb2f986d0d3017d51a5bfdd718303fa5dd6fa5f8a134e63554b0700c2fb4","schema_version":"1.0","event_id":"sha256:fdb9cb2f986d0d3017d51a5bfdd718303fa5dd6fa5f8a134e63554b0700c2fb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:23WDSMYH6RFKE36EK4J2KGBPSW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Additive phase-noise in frequency conversion in LLRF systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"physics.ins-det","authors_text":"Igor Rutkowski, Krzysztof Czuba","submitted_at":"2018-06-25T01:45:47Z","abstract_excerpt":"This contribution focuses on phase-noise added during frequency conversion in low-level radio frequency (LLRF) control systems. The stability of beams' parameters in linear accelerators depends on the stability of amplitude and phase of the accelerating field. A LLRF control system regulates the electromagnetic field inside accelerating modules based on the input RF signals. Typically active mixers down-convert those signals, which are later sampled and digitized by ADCs. This field detection scheme necessitates synthesis of a heterodyne/local oscillator (LO) signal which is often generated us"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.09247","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":"2026-05-18T00:12:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z2iTmu2DaNbBwSrlaJh8yD6uYgZZX/q9Yzqyocma/7/ig5mMwlJGKv+HHKGztWrWJWTENUOr5ITxewMOTSzACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T23:23:25.182920Z"},"content_sha256":"0cf69fafd598eb597fd2c41eef79d19c7a9e87440ecd70b7ce8fc9ed3e2f1841","schema_version":"1.0","event_id":"sha256:0cf69fafd598eb597fd2c41eef79d19c7a9e87440ecd70b7ce8fc9ed3e2f1841"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/23WDSMYH6RFKE36EK4J2KGBPSW/bundle.json","state_url":"https://pith.science/pith/23WDSMYH6RFKE36EK4J2KGBPSW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/23WDSMYH6RFKE36EK4J2KGBPSW/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":"2026-06-23T23:23:25Z","links":{"resolver":"https://pith.science/pith/23WDSMYH6RFKE36EK4J2KGBPSW","bundle":"https://pith.science/pith/23WDSMYH6RFKE36EK4J2KGBPSW/bundle.json","state":"https://pith.science/pith/23WDSMYH6RFKE36EK4J2KGBPSW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/23WDSMYH6RFKE36EK4J2KGBPSW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:23WDSMYH6RFKE36EK4J2KGBPSW","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":"0d89dcf6e02e0da09849db7296ca7bd604146cbf1af9136b3379139034625bb9","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-06-25T01:45:47Z","title_canon_sha256":"9dd00e7a45d0cc101dea045c3af50106e5794fa599cab475f7dd12448df65b07"},"schema_version":"1.0","source":{"id":"1806.09247","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.09247","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"arxiv_version","alias_value":"1806.09247v1","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.09247","created_at":"2026-05-18T00:12:29Z"},{"alias_kind":"pith_short_12","alias_value":"23WDSMYH6RFK","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"23WDSMYH6RFKE36E","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"23WDSMYH","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:0cf69fafd598eb597fd2c41eef79d19c7a9e87440ecd70b7ce8fc9ed3e2f1841","target":"graph","created_at":"2026-05-18T00:12:29Z","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 contribution focuses on phase-noise added during frequency conversion in low-level radio frequency (LLRF) control systems. The stability of beams' parameters in linear accelerators depends on the stability of amplitude and phase of the accelerating field. A LLRF control system regulates the electromagnetic field inside accelerating modules based on the input RF signals. Typically active mixers down-convert those signals, which are later sampled and digitized by ADCs. This field detection scheme necessitates synthesis of a heterodyne/local oscillator (LO) signal which is often generated us","authors_text":"Igor Rutkowski, Krzysztof Czuba","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-06-25T01:45:47Z","title":"Additive phase-noise in frequency conversion in LLRF systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.09247","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:fdb9cb2f986d0d3017d51a5bfdd718303fa5dd6fa5f8a134e63554b0700c2fb4","target":"record","created_at":"2026-05-18T00:12:29Z","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":"0d89dcf6e02e0da09849db7296ca7bd604146cbf1af9136b3379139034625bb9","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-06-25T01:45:47Z","title_canon_sha256":"9dd00e7a45d0cc101dea045c3af50106e5794fa599cab475f7dd12448df65b07"},"schema_version":"1.0","source":{"id":"1806.09247","kind":"arxiv","version":1}},"canonical_sha256":"d6ec393307f44aa26fc45713a5182f958933a7a6878b7e2fb9ce7db647e09cbb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6ec393307f44aa26fc45713a5182f958933a7a6878b7e2fb9ce7db647e09cbb","first_computed_at":"2026-05-18T00:12:29.890324Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:29.890324Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ptYloK2hTEsRqwcwrz6lq+tM4n6L8EbrEE5AXa6rCUpqNpi7+KPTlDgY5LAL+5OtVJ9zWP6MSdC2snfD2mBACw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:29.891009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.09247","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fdb9cb2f986d0d3017d51a5bfdd718303fa5dd6fa5f8a134e63554b0700c2fb4","sha256:0cf69fafd598eb597fd2c41eef79d19c7a9e87440ecd70b7ce8fc9ed3e2f1841"],"state_sha256":"cf5377043beddae898500e66c4dd318d7bac709787fa9a594573874c179df39d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lFYjXmIiK+XI9KIxttx9ZxjH7536glJT1QAzx6TJVH3cYGF82hNQeORAQaOcmhaISFiqpCuTIukpVcY3zatnCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T23:23:25.184949Z","bundle_sha256":"dce758e6048b952086fef5abb286e5bc9942c5d6ce5043879de28f71d89a2f60"}}