{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:4VKIUAZ2DCDWKSBTACNJ4RAEVH","short_pith_number":"pith:4VKIUAZ2","canonical_record":{"source":{"id":"hep-ph/0103185","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2001-03-16T12:39:18Z","cross_cats_sorted":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"title_canon_sha256":"702bbc2c927f9d8c3053a2867445b273422d55d58c20ca5d245956583ec70348","abstract_canon_sha256":"9dc896f1e457a83027580ee688c9f4b81f0580378e873d348b3e15bfc596b2e5"},"schema_version":"1.0"},"canonical_sha256":"e5548a033a1887654833009a9e4404a9dbc4001571a56f95d22c037bc21b4ee7","source":{"kind":"arxiv","id":"hep-ph/0103185","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0103185","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0103185v1","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0103185","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"4VKIUAZ2DCDW","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"4VKIUAZ2DCDWKSBT","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"4VKIUAZ2","created_at":"2026-07-04T15:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:4VKIUAZ2DCDWKSBTACNJ4RAEVH","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/0103185","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2001-03-16T12:39:18Z","cross_cats_sorted":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"title_canon_sha256":"702bbc2c927f9d8c3053a2867445b273422d55d58c20ca5d245956583ec70348","abstract_canon_sha256":"9dc896f1e457a83027580ee688c9f4b81f0580378e873d348b3e15bfc596b2e5"},"schema_version":"1.0"},"canonical_sha256":"e5548a033a1887654833009a9e4404a9dbc4001571a56f95d22c037bc21b4ee7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:26:41.146715Z","signature_b64":"xFSnnnLOSDc3flC5kMmRfRsEcxk1rfXhtkrJwBXy8GAl1NdKYw1KDAWy5zNJeDzpqx23aMIUagebsqri8o4aDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5548a033a1887654833009a9e4404a9dbc4001571a56f95d22c037bc21b4ee7","last_reissued_at":"2026-07-04T15:26:41.146288Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:26:41.146288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/0103185","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":"2026-07-04T15:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4eK60L5WZQcL2dXkBnI2vMxIQikE/jnvhUvTeg22ST3s83geimAeik0fSFYj5e/SEv8buQIAd3wPdaTtXG2yDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:03:22.034223Z"},"content_sha256":"091eecd9d8b6c70a34406eddbf9e156eb86bdd48a139b7b0964e91f80087296f","schema_version":"1.0","event_id":"sha256:091eecd9d8b6c70a34406eddbf9e156eb86bdd48a139b7b0964e91f80087296f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:4VKIUAZ2DCDWKSBTACNJ4RAEVH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pair Production from Vacuum at the Focus of an X-Ray Free Electron Laser","license":"","headline":"","cross_cats":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"primary_cat":"hep-ph","authors_text":"A. Ringwald (DESY)","submitted_at":"2001-03-16T12:39:18Z","abstract_excerpt":"There are definite plans for the construction of X-ray free electron lasers (FEL), both at DESY, where the so-called XFEL is part of the design of the electron-positron linear collider TESLA, as well as at SLAC, where the so-called Linac Coherent Light Source (LCLS) has been proposed. Such an X-ray laser would allow for high-field science applications: One could make use of not only the high energy and transverse coherence of the X-ray beam, but also of the possibility of focusing it to a spot with a small radius, hopefully in the range of the laser wavelength. Along this route one obtains ver"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0103185","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/0103185/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PoW4m7v6apIw7HiOs/S5pZyUtD7Hl9iUdfd6v/3KvLLmo68+yKuEFJd8PSaWBFsss7mXiEdDO3W3p4tp2PesDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:03:22.034758Z"},"content_sha256":"ca3cab3c3a2f69d9754f3995dc770a6e5109d05a2ed29c815e922b20d101432d","schema_version":"1.0","event_id":"sha256:ca3cab3c3a2f69d9754f3995dc770a6e5109d05a2ed29c815e922b20d101432d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/bundle.json","state_url":"https://pith.science/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/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":"2026-08-04T17:03:22Z","links":{"resolver":"https://pith.science/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH","bundle":"https://pith.science/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/bundle.json","state":"https://pith.science/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4VKIUAZ2DCDWKSBTACNJ4RAEVH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:4VKIUAZ2DCDWKSBTACNJ4RAEVH","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":"9dc896f1e457a83027580ee688c9f4b81f0580378e873d348b3e15bfc596b2e5","cross_cats_sorted":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"license":"","primary_cat":"hep-ph","submitted_at":"2001-03-16T12:39:18Z","title_canon_sha256":"702bbc2c927f9d8c3053a2867445b273422d55d58c20ca5d245956583ec70348"},"schema_version":"1.0","source":{"id":"hep-ph/0103185","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0103185","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0103185v1","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0103185","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"4VKIUAZ2DCDW","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"4VKIUAZ2DCDWKSBT","created_at":"2026-07-04T15:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"4VKIUAZ2","created_at":"2026-07-04T15:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:ca3cab3c3a2f69d9754f3995dc770a6e5109d05a2ed29c815e922b20d101432d","target":"graph","created_at":"2026-07-04T15:26:41Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/hep-ph/0103185/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"There are definite plans for the construction of X-ray free electron lasers (FEL), both at DESY, where the so-called XFEL is part of the design of the electron-positron linear collider TESLA, as well as at SLAC, where the so-called Linac Coherent Light Source (LCLS) has been proposed. Such an X-ray laser would allow for high-field science applications: One could make use of not only the high energy and transverse coherence of the X-ray beam, but also of the possibility of focusing it to a spot with a small radius, hopefully in the range of the laser wavelength. Along this route one obtains ver","authors_text":"A. Ringwald (DESY)","cross_cats":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2001-03-16T12:39:18Z","title":"Pair Production from Vacuum at the Focus of an X-Ray Free Electron Laser"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0103185","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":"sha256:091eecd9d8b6c70a34406eddbf9e156eb86bdd48a139b7b0964e91f80087296f","target":"record","created_at":"2026-07-04T15:26:41Z","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":"9dc896f1e457a83027580ee688c9f4b81f0580378e873d348b3e15bfc596b2e5","cross_cats_sorted":["astro-ph","hep-ex","hep-th","physics.plasm-ph"],"license":"","primary_cat":"hep-ph","submitted_at":"2001-03-16T12:39:18Z","title_canon_sha256":"702bbc2c927f9d8c3053a2867445b273422d55d58c20ca5d245956583ec70348"},"schema_version":"1.0","source":{"id":"hep-ph/0103185","kind":"arxiv","version":1}},"canonical_sha256":"e5548a033a1887654833009a9e4404a9dbc4001571a56f95d22c037bc21b4ee7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5548a033a1887654833009a9e4404a9dbc4001571a56f95d22c037bc21b4ee7","first_computed_at":"2026-07-04T15:26:41.146288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:26:41.146288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xFSnnnLOSDc3flC5kMmRfRsEcxk1rfXhtkrJwBXy8GAl1NdKYw1KDAWy5zNJeDzpqx23aMIUagebsqri8o4aDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:26:41.146715Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0103185","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:091eecd9d8b6c70a34406eddbf9e156eb86bdd48a139b7b0964e91f80087296f","sha256:ca3cab3c3a2f69d9754f3995dc770a6e5109d05a2ed29c815e922b20d101432d"],"state_sha256":"a177d5c336f8de51471ff79fee395d4bb645c3d99b7e2eb7109afc6028b81f96"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aosCAEHGRIdHVqayVSvqJiRsqUV0p1GntDZrL0HtwiGUsaa4iPqzHutYu/gCtEgGEgVCher6Of8A64rNliHbBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:03:22.040099Z","bundle_sha256":"cb6f9511d45c3721ed238c749bd4ad3f393c4303f0f45abf510dcbe96cda012e"}}