{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:S3PYUDR3YU2X2F262BYJHZF24P","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":"c7a8553ae13beb563251aee9b5ca2ae13f696073f9cfeb9ec1bc0bd9c73e7b38","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-05-18T23:36:02Z","title_canon_sha256":"062ca17ef8c5ad3a924b09468890e047e28dbb9d0bcd91ea97cf4d60d9aeb66e"},"schema_version":"1.0","source":{"id":"1905.07657","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.07657","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1905.07657v1","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.07657","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"S3PYUDR3YU2X","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"S3PYUDR3YU2X2F26","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"S3PYUDR3","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:f2eb145948223d38714c353e41cd4944a2d244bf67002af5670657a95f696349","target":"graph","created_at":"2026-05-17T23:45:48Z","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":"This paper describes the concept of a primary electron beam facility at CERN, to be used for dark gauge force and light dark matter searches. The electron beam is produced in three stages: A Linac accelerates electrons from a photo-cathode up to 3.5 GeV. This beam is injected into the Super Proton Synchrotron, SPS, and accelerated up to a maximum energy of 16 GeV. Finally, the accelerated beam is slowly extracted to an experiment, possibly followed by a fast dump of the remaining electrons to another beamline. The beam parameters are optimized using the requirements of the Light Dark Matter eX","authors_text":"A. Grudiev, A. Latina, B. Goddard, L. Evans, R. Corsini, S. Stapnes, T. {\\AA}kesson, Y. Dutheil, Y. Papaphilippou","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-05-18T23:36:02Z","title":"A primary electron beam facility at CERN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.07657","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":"sha256:02f301965bbf3cc2f518b8118a5eb064881a4fde6f0f46a36bd884dcf78afca4","target":"record","created_at":"2026-05-17T23:45:48Z","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":"c7a8553ae13beb563251aee9b5ca2ae13f696073f9cfeb9ec1bc0bd9c73e7b38","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-05-18T23:36:02Z","title_canon_sha256":"062ca17ef8c5ad3a924b09468890e047e28dbb9d0bcd91ea97cf4d60d9aeb66e"},"schema_version":"1.0","source":{"id":"1905.07657","kind":"arxiv","version":1}},"canonical_sha256":"96df8a0e3bc5357d175ed07093e4bae3d71a97393dfcecc2673f79a9e5c6386f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"96df8a0e3bc5357d175ed07093e4bae3d71a97393dfcecc2673f79a9e5c6386f","first_computed_at":"2026-05-17T23:45:48.897735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:48.897735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Jwguh60XvZ07HZffnVJLtP9TZACDcdt/Jy4Pt4jNT6hBGmGLiJB/zzKCokHnezWXvRnbLqC2FfxEaLjGgkKwAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:48.898406Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.07657","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02f301965bbf3cc2f518b8118a5eb064881a4fde6f0f46a36bd884dcf78afca4","sha256:f2eb145948223d38714c353e41cd4944a2d244bf67002af5670657a95f696349"],"state_sha256":"65485e955d48d7096686ecc9f96e20789fe64962943d07c8cb1b50da8e063a5b"}