{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KV67TGUBPTVZ6JAIJV52KRE4LZ","short_pith_number":"pith:KV67TGUB","canonical_record":{"source":{"id":"1505.08012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-29T12:24:21Z","cross_cats_sorted":[],"title_canon_sha256":"26181b5b305565a0dd57efd9e7ef4d7e13bc2971afaf334d0b03b08aa8477ce5","abstract_canon_sha256":"62e9b87fe136bbad858bf9ff26b2039ee6ea38ffca685802f4ff4f1f8d12f728"},"schema_version":"1.0"},"canonical_sha256":"557df99a817ceb9f24084d7ba5449c5e5a8fe18c434c392401a87753f5ee17bb","source":{"kind":"arxiv","id":"1505.08012","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.08012","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.08012v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.08012","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"KV67TGUBPTVZ","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KV67TGUBPTVZ6JAI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KV67TGUB","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KV67TGUBPTVZ6JAIJV52KRE4LZ","target":"record","payload":{"canonical_record":{"source":{"id":"1505.08012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-29T12:24:21Z","cross_cats_sorted":[],"title_canon_sha256":"26181b5b305565a0dd57efd9e7ef4d7e13bc2971afaf334d0b03b08aa8477ce5","abstract_canon_sha256":"62e9b87fe136bbad858bf9ff26b2039ee6ea38ffca685802f4ff4f1f8d12f728"},"schema_version":"1.0"},"canonical_sha256":"557df99a817ceb9f24084d7ba5449c5e5a8fe18c434c392401a87753f5ee17bb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:00.091338Z","signature_b64":"d+bMOu3xQ16R5xo8RgIr9tQqngCCKJ9s+mPyZtfBY3cHgHzS2fJ3luxwrqwslvlsHvCfBKKJGPfBamJqYiCHAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"557df99a817ceb9f24084d7ba5449c5e5a8fe18c434c392401a87753f5ee17bb","last_reissued_at":"2026-05-18T01:25:00.090527Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:00.090527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.08012","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0eZZsBLLamwWEfHzGOWjVpfEA+4MBwqkmdlb5bKbmhjnzpIlDONASxYOrNX8PnlYao8VptDdO87EHbgTfdOMAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:28:22.204982Z"},"content_sha256":"a948f2bb5eda6588ca8d078b5cf51aa9ba0fa65525dd86fe9114f41eae5f574b","schema_version":"1.0","event_id":"sha256:a948f2bb5eda6588ca8d078b5cf51aa9ba0fa65525dd86fe9114f41eae5f574b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KV67TGUBPTVZ6JAIJV52KRE4LZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pathway to a Compact SASE FEL Device","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"E. Di Palma, E. Sabia, G. Dattoli, I. Spassovsky, J. Einstein, J. V. Rau, S. G. Biedron, S. V. Milton, V. Petrillo","submitted_at":"2015-05-29T12:24:21Z","abstract_excerpt":"Newly developed high peak power lasers have opened the possibilities of driving coherent light sources operating with laser plasma accelerated beams and wave undulators. We speculate on the combination of these two concepts and show that the merging of the underlying technologies could lead to new and interesting possibilities to achieve truly compact, coherent radiator devices."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.08012","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BSW4cLhtZkip6aulZ9DGIaLIyrL3SSYpw8T2OCYlfBgmDu+Yc2VOGuRwc+Bl+E+D9sD281/sD5D6D7Hf4UOmCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:28:22.205663Z"},"content_sha256":"8b2954a1d7b20005e51cbee356df29a6f8b52cc3718ab285d65898845cbcdd2a","schema_version":"1.0","event_id":"sha256:8b2954a1d7b20005e51cbee356df29a6f8b52cc3718ab285d65898845cbcdd2a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/bundle.json","state_url":"https://pith.science/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/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":"2026-05-31T14:28:22Z","links":{"resolver":"https://pith.science/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ","bundle":"https://pith.science/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/bundle.json","state":"https://pith.science/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KV67TGUBPTVZ6JAIJV52KRE4LZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KV67TGUBPTVZ6JAIJV52KRE4LZ","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":"62e9b87fe136bbad858bf9ff26b2039ee6ea38ffca685802f4ff4f1f8d12f728","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-29T12:24:21Z","title_canon_sha256":"26181b5b305565a0dd57efd9e7ef4d7e13bc2971afaf334d0b03b08aa8477ce5"},"schema_version":"1.0","source":{"id":"1505.08012","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.08012","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.08012v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.08012","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"KV67TGUBPTVZ","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KV67TGUBPTVZ6JAI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KV67TGUB","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:8b2954a1d7b20005e51cbee356df29a6f8b52cc3718ab285d65898845cbcdd2a","target":"graph","created_at":"2026-05-18T01:25:00Z","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":"Newly developed high peak power lasers have opened the possibilities of driving coherent light sources operating with laser plasma accelerated beams and wave undulators. We speculate on the combination of these two concepts and show that the merging of the underlying technologies could lead to new and interesting possibilities to achieve truly compact, coherent radiator devices.","authors_text":"E. Di Palma, E. Sabia, G. Dattoli, I. Spassovsky, J. Einstein, J. V. Rau, S. G. Biedron, S. V. Milton, V. Petrillo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-29T12:24:21Z","title":"Pathway to a Compact SASE FEL Device"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.08012","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:a948f2bb5eda6588ca8d078b5cf51aa9ba0fa65525dd86fe9114f41eae5f574b","target":"record","created_at":"2026-05-18T01:25:00Z","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":"62e9b87fe136bbad858bf9ff26b2039ee6ea38ffca685802f4ff4f1f8d12f728","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-29T12:24:21Z","title_canon_sha256":"26181b5b305565a0dd57efd9e7ef4d7e13bc2971afaf334d0b03b08aa8477ce5"},"schema_version":"1.0","source":{"id":"1505.08012","kind":"arxiv","version":1}},"canonical_sha256":"557df99a817ceb9f24084d7ba5449c5e5a8fe18c434c392401a87753f5ee17bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"557df99a817ceb9f24084d7ba5449c5e5a8fe18c434c392401a87753f5ee17bb","first_computed_at":"2026-05-18T01:25:00.090527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:00.090527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d+bMOu3xQ16R5xo8RgIr9tQqngCCKJ9s+mPyZtfBY3cHgHzS2fJ3luxwrqwslvlsHvCfBKKJGPfBamJqYiCHAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:00.091338Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.08012","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a948f2bb5eda6588ca8d078b5cf51aa9ba0fa65525dd86fe9114f41eae5f574b","sha256:8b2954a1d7b20005e51cbee356df29a6f8b52cc3718ab285d65898845cbcdd2a"],"state_sha256":"9454602275d40fda581633b8887c98847911bdf3a8fa0279d3b0c1a004206e9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jawU4a2bn9U1rUEEKQ+KrEbZBR2AwvuNL/q/wDZbaHI7YO+bBqzoAOmiO9wh5JI8rsYDXGs+blJBQfVXtYh+CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T14:28:22.209756Z","bundle_sha256":"c63fcbcf876bfd749b09093c1c85d3956b1cc8f336b5a4f8eeeafd73ef512273"}}