{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SLR5JWP7ZVE35AUCWQ7EOW2LDO","short_pith_number":"pith:SLR5JWP7","canonical_record":{"source":{"id":"1909.00860","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-02T20:41:38Z","cross_cats_sorted":["hep-ex","physics.acc-ph"],"title_canon_sha256":"0c783ad98913e2cc20a3a274b4b8cf0de5b14e22da86ede3d15a4e5b7c522759","abstract_canon_sha256":"4f503c3500706b59675f938f3d42fe8db7647c9f9fb354224fd2211e76d9b537"},"schema_version":"1.0"},"canonical_sha256":"92e3d4d9ffcd49be8282b43e475b4b1bba4ae31be71f2b14812b3d62fc7fe561","source":{"kind":"arxiv","id":"1909.00860","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.00860","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"1909.00860v1","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.00860","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"SLR5JWP7ZVE3","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_16","alias_value":"SLR5JWP7ZVE35AUC","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_8","alias_value":"SLR5JWP7","created_at":"2026-07-05T00:01:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SLR5JWP7ZVE35AUCWQ7EOW2LDO","target":"record","payload":{"canonical_record":{"source":{"id":"1909.00860","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-02T20:41:38Z","cross_cats_sorted":["hep-ex","physics.acc-ph"],"title_canon_sha256":"0c783ad98913e2cc20a3a274b4b8cf0de5b14e22da86ede3d15a4e5b7c522759","abstract_canon_sha256":"4f503c3500706b59675f938f3d42fe8db7647c9f9fb354224fd2211e76d9b537"},"schema_version":"1.0"},"canonical_sha256":"92e3d4d9ffcd49be8282b43e475b4b1bba4ae31be71f2b14812b3d62fc7fe561","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:01:13.579197Z","signature_b64":"MHQmc+3uX7EiJC1Ve8XuElzhDHDdlF09K7Wbs3DFXVsOe2U03g9VLywav86Pwu7mnKHljKQZU9KQRu3xU/wJCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92e3d4d9ffcd49be8282b43e475b4b1bba4ae31be71f2b14812b3d62fc7fe561","last_reissued_at":"2026-07-05T00:01:13.578735Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:01:13.578735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.00860","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":"2026-07-05T00:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1j9HTuV9wIwC1CavZXqfbfOORSO0Kc2bTxk6Fxme+K52jMlWQ7bTC9K/JFrj+W8NepoWAVw+rXIzzg9YCF/sCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:58:59.308818Z"},"content_sha256":"a16ce8ca5d63473abbc8537b2ae07fb6dd77ffbba58b785ed66faced320bdfb0","schema_version":"1.0","event_id":"sha256:a16ce8ca5d63473abbc8537b2ae07fb6dd77ffbba58b785ed66faced320bdfb0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SLR5JWP7ZVE35AUCWQ7EOW2LDO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Letter of Intent for the LUXE Experiment","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","physics.acc-ph"],"primary_cat":"physics.ins-det","authors_text":"A.Hartin, A. Ilderton, A. Levy, A. Ringwald, A. R. Maier, B.Heinemann, B. King, C. R\\\"odel, E. Negodin, F. Burkart, F. Salgado, G. Perez, G. Sarri, H. Abramowicz, H.Harsh, I. Hartl, I. Pomerantz, I. Savoray, J. List, K. B\\\"u{\\ss}er, M.Altarelli, M. Borysova, M. Hoffmann, M. Saimpert, M. Wing, M. Zepf, N. Elkina, N. TalHod, O.Borysov, O. Davidi, R. A{\\ss}mann, R. Brinkmann, T. Behnke, T. Heinzl, T. Teter, W. Decking, Y.Benhammou","submitted_at":"2019-09-02T20:41:38Z","abstract_excerpt":"This Letter of Intent describes LUXE (Laser Und XFEL Experiment), an experiment that aims to use the high-quality and high-energy electron beam of the European XFEL and a powerful laser. The scientific objective of the experiment is to study quantum electrodynamics processes in the regime of strong fields. High-energy electrons, accelerated by the European XFEL linear accelerator, and high-energy photons, produced via Bremsstrahlung of those beam electrons, colliding with a laser beam shall experience an electric field up to three times larger than the Schwinger critical field (the field at wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.00860","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/1909.00860/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":"2026-07-05T00:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"98Ev+wQi+cZqwBSJP+i/HU/AHrrsdfLB115oiWA9/fkHxcmhVXYRaVrp5J8N5gVR0c8SSFgaZNTFzOM6vfQ+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:58:59.309324Z"},"content_sha256":"b8ecef5ac7df83471dda8d3221925eefc11b3dcabe29a5c065e035dea2c75691","schema_version":"1.0","event_id":"sha256:b8ecef5ac7df83471dda8d3221925eefc11b3dcabe29a5c065e035dea2c75691"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/bundle.json","state_url":"https://pith.science/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/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":"2026-08-03T17:58:59Z","links":{"resolver":"https://pith.science/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO","bundle":"https://pith.science/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/bundle.json","state":"https://pith.science/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SLR5JWP7ZVE35AUCWQ7EOW2LDO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SLR5JWP7ZVE35AUCWQ7EOW2LDO","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":"4f503c3500706b59675f938f3d42fe8db7647c9f9fb354224fd2211e76d9b537","cross_cats_sorted":["hep-ex","physics.acc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-02T20:41:38Z","title_canon_sha256":"0c783ad98913e2cc20a3a274b4b8cf0de5b14e22da86ede3d15a4e5b7c522759"},"schema_version":"1.0","source":{"id":"1909.00860","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.00860","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"1909.00860v1","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.00860","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"SLR5JWP7ZVE3","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_16","alias_value":"SLR5JWP7ZVE35AUC","created_at":"2026-07-05T00:01:13Z"},{"alias_kind":"pith_short_8","alias_value":"SLR5JWP7","created_at":"2026-07-05T00:01:13Z"}],"graph_snapshots":[{"event_id":"sha256:b8ecef5ac7df83471dda8d3221925eefc11b3dcabe29a5c065e035dea2c75691","target":"graph","created_at":"2026-07-05T00:01:13Z","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/1909.00860/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This Letter of Intent describes LUXE (Laser Und XFEL Experiment), an experiment that aims to use the high-quality and high-energy electron beam of the European XFEL and a powerful laser. The scientific objective of the experiment is to study quantum electrodynamics processes in the regime of strong fields. High-energy electrons, accelerated by the European XFEL linear accelerator, and high-energy photons, produced via Bremsstrahlung of those beam electrons, colliding with a laser beam shall experience an electric field up to three times larger than the Schwinger critical field (the field at wh","authors_text":"A.Hartin, A. Ilderton, A. Levy, A. Ringwald, A. R. Maier, B.Heinemann, B. King, C. R\\\"odel, E. Negodin, F. Burkart, F. Salgado, G. Perez, G. Sarri, H. Abramowicz, H.Harsh, I. Hartl, I. Pomerantz, I. Savoray, J. List, K. B\\\"u{\\ss}er, M.Altarelli, M. Borysova, M. Hoffmann, M. Saimpert, M. Wing, M. Zepf, N. Elkina, N. TalHod, O.Borysov, O. Davidi, R. A{\\ss}mann, R. Brinkmann, T. Behnke, T. Heinzl, T. Teter, W. Decking, Y.Benhammou","cross_cats":["hep-ex","physics.acc-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-02T20:41:38Z","title":"Letter of Intent for the LUXE Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.00860","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:a16ce8ca5d63473abbc8537b2ae07fb6dd77ffbba58b785ed66faced320bdfb0","target":"record","created_at":"2026-07-05T00:01:13Z","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":"4f503c3500706b59675f938f3d42fe8db7647c9f9fb354224fd2211e76d9b537","cross_cats_sorted":["hep-ex","physics.acc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-02T20:41:38Z","title_canon_sha256":"0c783ad98913e2cc20a3a274b4b8cf0de5b14e22da86ede3d15a4e5b7c522759"},"schema_version":"1.0","source":{"id":"1909.00860","kind":"arxiv","version":1}},"canonical_sha256":"92e3d4d9ffcd49be8282b43e475b4b1bba4ae31be71f2b14812b3d62fc7fe561","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92e3d4d9ffcd49be8282b43e475b4b1bba4ae31be71f2b14812b3d62fc7fe561","first_computed_at":"2026-07-05T00:01:13.578735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:01:13.578735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MHQmc+3uX7EiJC1Ve8XuElzhDHDdlF09K7Wbs3DFXVsOe2U03g9VLywav86Pwu7mnKHljKQZU9KQRu3xU/wJCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:01:13.579197Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.00860","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a16ce8ca5d63473abbc8537b2ae07fb6dd77ffbba58b785ed66faced320bdfb0","sha256:b8ecef5ac7df83471dda8d3221925eefc11b3dcabe29a5c065e035dea2c75691"],"state_sha256":"0b4f7dcafc99a4c83c7c97ad85010fa8542598c3f34c9e7b760ea850cda128fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2z2aGu93i9rswpxlRc9ldpDAjOonNP/c0M/kBdm21QUWL/SOT2IvQbjEq51VvwcaDDkOka64S51wB3+oZp3YDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:58:59.312599Z","bundle_sha256":"c065de236e37b3e1f1366e5778ea9de963ab889a00b05ce786cc661218c46742"}}