{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IKDSOWS2XQ65JCDXEEVV656UAI","short_pith_number":"pith:IKDSOWS2","canonical_record":{"source":{"id":"1111.4122","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-11-17T15:03:00Z","cross_cats_sorted":[],"title_canon_sha256":"977f81f507835cfecb6cfbaea32ae380a1595ea54a5c5f63b641a231670acfed","abstract_canon_sha256":"3cdcb1f1d5807c02310140e6fbb02ff6bc85466c392093b8a0301e395bda0b2f"},"schema_version":"1.0"},"canonical_sha256":"4287275a5abc3dd48877212b5f77d40222eb1b0233a0dbb699fb239d986619b5","source":{"kind":"arxiv","id":"1111.4122","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4122","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4122v2","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4122","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"pith_short_12","alias_value":"IKDSOWS2XQ65","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IKDSOWS2XQ65JCDX","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IKDSOWS2","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IKDSOWS2XQ65JCDXEEVV656UAI","target":"record","payload":{"canonical_record":{"source":{"id":"1111.4122","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-11-17T15:03:00Z","cross_cats_sorted":[],"title_canon_sha256":"977f81f507835cfecb6cfbaea32ae380a1595ea54a5c5f63b641a231670acfed","abstract_canon_sha256":"3cdcb1f1d5807c02310140e6fbb02ff6bc85466c392093b8a0301e395bda0b2f"},"schema_version":"1.0"},"canonical_sha256":"4287275a5abc3dd48877212b5f77d40222eb1b0233a0dbb699fb239d986619b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:49.159479Z","signature_b64":"sgMySYPMLWSqFL+JkmiOYS9NiRObwr8d2kum9taZ0PJJFwmHHBJbChR9L7j/I//HXDO7vUAkVHHVlHlIYOn6BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4287275a5abc3dd48877212b5f77d40222eb1b0233a0dbb699fb239d986619b5","last_reissued_at":"2026-05-18T04:00:49.159083Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:49.159083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.4122","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CSooeYLsF0g4+VXwhLr33IwGL7zE0VJs2Ss7mVECoAiVxOYsymia5KeaVhIsg19c0K1OpMLZwN1cE+SdQV1NBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T00:48:47.983615Z"},"content_sha256":"e56856a5bce219b8fbfc1189b215d2376eb9b65c71aad97847df4f7a6f7e4a9f","schema_version":"1.0","event_id":"sha256:e56856a5bce219b8fbfc1189b215d2376eb9b65c71aad97847df4f7a6f7e4a9f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IKDSOWS2XQ65JCDXEEVV656UAI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reversible electron beam heating for suppression of microbunching instabilities at free-electron lasers","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Christopher Behrens, Dao Xiang, Zhirong Huang","submitted_at":"2011-11-17T15:03:00Z","abstract_excerpt":"The presence of microbunching instabilities due to the compression of high-brightness electron beams at existing and future X-ray free-electron lasers (FELs) results in restrictions on the attainable lasing performance and renders beam imaging with optical transition radiation impossible. The instability can be suppressed by introducing additional energy spread, i.e., \"heating\" the electron beam, as demonstrated by the successful operation of the laser heater system at the Linac Coherent Light Source. The increased energy spread is typically tolerable for self-amplified spontaneous emission FE"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4122","kind":"arxiv","version":2},"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":"2026-05-18T04:00:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m8xrEbbXg9rvWY+eww6D/q9Ej52D/1P3jGPhN5GDrrGV2SNedUDUSiDgyAEgUF5czcUt6sh71EWeNwKQCXYrDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T00:48:47.983970Z"},"content_sha256":"fe234b9c2f2ce4a0ebc4f6915c28383403efd9c3bc8896e425397c0c55214823","schema_version":"1.0","event_id":"sha256:fe234b9c2f2ce4a0ebc4f6915c28383403efd9c3bc8896e425397c0c55214823"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IKDSOWS2XQ65JCDXEEVV656UAI/bundle.json","state_url":"https://pith.science/pith/IKDSOWS2XQ65JCDXEEVV656UAI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IKDSOWS2XQ65JCDXEEVV656UAI/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":"2026-06-22T00:48:47Z","links":{"resolver":"https://pith.science/pith/IKDSOWS2XQ65JCDXEEVV656UAI","bundle":"https://pith.science/pith/IKDSOWS2XQ65JCDXEEVV656UAI/bundle.json","state":"https://pith.science/pith/IKDSOWS2XQ65JCDXEEVV656UAI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IKDSOWS2XQ65JCDXEEVV656UAI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IKDSOWS2XQ65JCDXEEVV656UAI","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":"3cdcb1f1d5807c02310140e6fbb02ff6bc85466c392093b8a0301e395bda0b2f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-11-17T15:03:00Z","title_canon_sha256":"977f81f507835cfecb6cfbaea32ae380a1595ea54a5c5f63b641a231670acfed"},"schema_version":"1.0","source":{"id":"1111.4122","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4122","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4122v2","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4122","created_at":"2026-05-18T04:00:49Z"},{"alias_kind":"pith_short_12","alias_value":"IKDSOWS2XQ65","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IKDSOWS2XQ65JCDX","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IKDSOWS2","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:fe234b9c2f2ce4a0ebc4f6915c28383403efd9c3bc8896e425397c0c55214823","target":"graph","created_at":"2026-05-18T04:00:49Z","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":"The presence of microbunching instabilities due to the compression of high-brightness electron beams at existing and future X-ray free-electron lasers (FELs) results in restrictions on the attainable lasing performance and renders beam imaging with optical transition radiation impossible. The instability can be suppressed by introducing additional energy spread, i.e., \"heating\" the electron beam, as demonstrated by the successful operation of the laser heater system at the Linac Coherent Light Source. The increased energy spread is typically tolerable for self-amplified spontaneous emission FE","authors_text":"Christopher Behrens, Dao Xiang, Zhirong Huang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-11-17T15:03:00Z","title":"Reversible electron beam heating for suppression of microbunching instabilities at free-electron lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4122","kind":"arxiv","version":2},"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:e56856a5bce219b8fbfc1189b215d2376eb9b65c71aad97847df4f7a6f7e4a9f","target":"record","created_at":"2026-05-18T04:00:49Z","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":"3cdcb1f1d5807c02310140e6fbb02ff6bc85466c392093b8a0301e395bda0b2f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-11-17T15:03:00Z","title_canon_sha256":"977f81f507835cfecb6cfbaea32ae380a1595ea54a5c5f63b641a231670acfed"},"schema_version":"1.0","source":{"id":"1111.4122","kind":"arxiv","version":2}},"canonical_sha256":"4287275a5abc3dd48877212b5f77d40222eb1b0233a0dbb699fb239d986619b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4287275a5abc3dd48877212b5f77d40222eb1b0233a0dbb699fb239d986619b5","first_computed_at":"2026-05-18T04:00:49.159083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:49.159083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sgMySYPMLWSqFL+JkmiOYS9NiRObwr8d2kum9taZ0PJJFwmHHBJbChR9L7j/I//HXDO7vUAkVHHVlHlIYOn6BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:49.159479Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.4122","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e56856a5bce219b8fbfc1189b215d2376eb9b65c71aad97847df4f7a6f7e4a9f","sha256:fe234b9c2f2ce4a0ebc4f6915c28383403efd9c3bc8896e425397c0c55214823"],"state_sha256":"7291c9329dd80b93ea0b102fc5c30c86f3bfbab7765791e248d50533dc750460"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HuJdOF5uRvYccKZavqfTnZyHGKOeJm2Od+vnrpg4+ySo1xeFwofKIxKW7t89efHoJON88OMJleoV7slBArR1Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T00:48:47.986056Z","bundle_sha256":"9584f7d0bce925cd69cb7548d0c255a0fa0c8d31717b8eee0405cb5276be6866"}}