{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IJUYFUGUFTCWQO55U7QB45IAD3","short_pith_number":"pith:IJUYFUGU","canonical_record":{"source":{"id":"1103.0112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-03-01T09:24:16Z","cross_cats_sorted":[],"title_canon_sha256":"04710948c638c6dac6ef890defb232e2ec0d9117ac06931a0ae60c9d36122da4","abstract_canon_sha256":"b6716c80d67c966a4ab4bbe8c9ecf4cffbc482f0944efa56dc192c4d8bb7b49a"},"schema_version":"1.0"},"canonical_sha256":"426982d0d42cc5683bbda7e01e75001ef2c074d5a75d8958c4187a1cdbd5ba12","source":{"kind":"arxiv","id":"1103.0112","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0112","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0112v2","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0112","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"pith_short_12","alias_value":"IJUYFUGUFTCW","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IJUYFUGUFTCWQO55","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IJUYFUGU","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IJUYFUGUFTCWQO55U7QB45IAD3","target":"record","payload":{"canonical_record":{"source":{"id":"1103.0112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-03-01T09:24:16Z","cross_cats_sorted":[],"title_canon_sha256":"04710948c638c6dac6ef890defb232e2ec0d9117ac06931a0ae60c9d36122da4","abstract_canon_sha256":"b6716c80d67c966a4ab4bbe8c9ecf4cffbc482f0944efa56dc192c4d8bb7b49a"},"schema_version":"1.0"},"canonical_sha256":"426982d0d42cc5683bbda7e01e75001ef2c074d5a75d8958c4187a1cdbd5ba12","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:35.414346Z","signature_b64":"frGEbo6MJUB1W8TJZaS9iY226GqCm3stsuxC6dmMHoMYvdUya8LCKtLjs6+g9rVDlyeWewEBZ3UYg3JrrTfZAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"426982d0d42cc5683bbda7e01e75001ef2c074d5a75d8958c4187a1cdbd5ba12","last_reissued_at":"2026-05-18T04:27:35.413785Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:35.413785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.0112","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":"2026-05-18T04:27:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZQeYLY4QfDIdV9Hvg+EjzPW+0wIL050J2w7X3iwGYtM+t1hTHxALcKxlP7sTiYIu8fKiz+gEeTRPWN3DUcCuAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:07:28.839996Z"},"content_sha256":"a871e5d224e0b580890b22dc9c490f4f7ed392e56734f30263840ead5441507f","schema_version":"1.0","event_id":"sha256:a871e5d224e0b580890b22dc9c490f4f7ed392e56734f30263840ead5441507f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IJUYFUGUFTCWQO55U7QB45IAD3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The echo-enabled harmonic generation options for FLASH II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"2), (2) Deutsches Elektronen-Synchrotron, Bart Faatz (2) ((1) Shanghai Institute of Applied Physics, China, Germany), Haixiao Deng (1, Hamburg, Shanghai, Winfried Decking (2)","submitted_at":"2011-03-01T09:24:16Z","abstract_excerpt":"FLASH II is an upgrade to the existing free electron laser (FEL) FLASH. The echo-enabled harmonic generation (EEHG) scheme is proposed to be a potential seeding option of FLASH II. In this paper, the possibility of EEHG operation of FLASH II is investigated for the first time. With a combination of existing numerical codes, i.e. a laser-beam interaction code in an undulator (LBICU), a beam tracking code in a chicane (ELEGANT) and an universal FEL simulating code (GENESIS), the effects of beam energy chirp and coherent synchrotron radiation (CSR) on EEHG operation are studied as well. In additi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0112","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":"2026-05-18T04:27:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Eacm8fGbdHzvv6wy9Ic13H83iqSHJi3loU77AYDQ47EYzs+MXoC+U8qyUc9RcC/TOkZYjNTuioPYRqKdQmf5Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:07:28.840737Z"},"content_sha256":"953925a6103c106094eb8f38fc9634c88b916b764100f7080086689cdf8fa149","schema_version":"1.0","event_id":"sha256:953925a6103c106094eb8f38fc9634c88b916b764100f7080086689cdf8fa149"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IJUYFUGUFTCWQO55U7QB45IAD3/bundle.json","state_url":"https://pith.science/pith/IJUYFUGUFTCWQO55U7QB45IAD3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IJUYFUGUFTCWQO55U7QB45IAD3/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":"2026-06-09T08:07:28Z","links":{"resolver":"https://pith.science/pith/IJUYFUGUFTCWQO55U7QB45IAD3","bundle":"https://pith.science/pith/IJUYFUGUFTCWQO55U7QB45IAD3/bundle.json","state":"https://pith.science/pith/IJUYFUGUFTCWQO55U7QB45IAD3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IJUYFUGUFTCWQO55U7QB45IAD3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IJUYFUGUFTCWQO55U7QB45IAD3","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":"b6716c80d67c966a4ab4bbe8c9ecf4cffbc482f0944efa56dc192c4d8bb7b49a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-03-01T09:24:16Z","title_canon_sha256":"04710948c638c6dac6ef890defb232e2ec0d9117ac06931a0ae60c9d36122da4"},"schema_version":"1.0","source":{"id":"1103.0112","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0112","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0112v2","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0112","created_at":"2026-05-18T04:27:35Z"},{"alias_kind":"pith_short_12","alias_value":"IJUYFUGUFTCW","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IJUYFUGUFTCWQO55","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IJUYFUGU","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:953925a6103c106094eb8f38fc9634c88b916b764100f7080086689cdf8fa149","target":"graph","created_at":"2026-05-18T04:27:35Z","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":"FLASH II is an upgrade to the existing free electron laser (FEL) FLASH. The echo-enabled harmonic generation (EEHG) scheme is proposed to be a potential seeding option of FLASH II. In this paper, the possibility of EEHG operation of FLASH II is investigated for the first time. With a combination of existing numerical codes, i.e. a laser-beam interaction code in an undulator (LBICU), a beam tracking code in a chicane (ELEGANT) and an universal FEL simulating code (GENESIS), the effects of beam energy chirp and coherent synchrotron radiation (CSR) on EEHG operation are studied as well. In additi","authors_text":"2), (2) Deutsches Elektronen-Synchrotron, Bart Faatz (2) ((1) Shanghai Institute of Applied Physics, China, Germany), Haixiao Deng (1, Hamburg, Shanghai, Winfried Decking (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-03-01T09:24:16Z","title":"The echo-enabled harmonic generation options for FLASH II"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0112","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:a871e5d224e0b580890b22dc9c490f4f7ed392e56734f30263840ead5441507f","target":"record","created_at":"2026-05-18T04:27:35Z","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":"b6716c80d67c966a4ab4bbe8c9ecf4cffbc482f0944efa56dc192c4d8bb7b49a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2011-03-01T09:24:16Z","title_canon_sha256":"04710948c638c6dac6ef890defb232e2ec0d9117ac06931a0ae60c9d36122da4"},"schema_version":"1.0","source":{"id":"1103.0112","kind":"arxiv","version":2}},"canonical_sha256":"426982d0d42cc5683bbda7e01e75001ef2c074d5a75d8958c4187a1cdbd5ba12","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"426982d0d42cc5683bbda7e01e75001ef2c074d5a75d8958c4187a1cdbd5ba12","first_computed_at":"2026-05-18T04:27:35.413785Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:35.413785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"frGEbo6MJUB1W8TJZaS9iY226GqCm3stsuxC6dmMHoMYvdUya8LCKtLjs6+g9rVDlyeWewEBZ3UYg3JrrTfZAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:35.414346Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.0112","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a871e5d224e0b580890b22dc9c490f4f7ed392e56734f30263840ead5441507f","sha256:953925a6103c106094eb8f38fc9634c88b916b764100f7080086689cdf8fa149"],"state_sha256":"cc55d3214ffc24f6ab86324c5bd8463c05a06b138fb819a75b972241492fbe3c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DiNErkfW8tThAuGdppXQYzAI9YZUmf9lejxDlST+Qp8w5BGyjc2pm5w1B9ysXHoGqgOc5tH/CV3+p9/SaY/2DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:07:28.844939Z","bundle_sha256":"d6a1133934fdf883c90f2fe0f97e178e7ca8db07778b76c211495e68b087d849"}}