{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BIOWDXLEWLJETXNYJNPVPZHK7I","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":"9be577a491c98be1dae97c709151806543a30362b6bed49eec0dae08494f46b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-09T18:32:57Z","title_canon_sha256":"5b460da0bcb89bd0b53b54b65dd6d19afa6962ffdab85af20a0a61439dcb3945"},"schema_version":"1.0","source":{"id":"1810.04202","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.04202","created_at":"2026-05-18T00:03:40Z"},{"alias_kind":"arxiv_version","alias_value":"1810.04202v1","created_at":"2026-05-18T00:03:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.04202","created_at":"2026-05-18T00:03:40Z"},{"alias_kind":"pith_short_12","alias_value":"BIOWDXLEWLJE","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BIOWDXLEWLJETXNY","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BIOWDXLE","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:7121f15e3c10a0ef9544e80ff4b0d8d73d2eccba5f9daae94b4b21f38d21e3e8","target":"graph","created_at":"2026-05-18T00:03:40Z","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":"We summarize and explain the realization of witness particle injection into wakefields for the AWAKE experiment. In AWAKE, the plasma wakefields are driven by a self-modulating relativistic proton bunch. To demonstrate that these wakefields can accelerate charged particles, we inject a \\unit[10-20]{MeV} electron bunch produced by a photo-injector. We summarize the experimental challenges of this injection process and present our plans for the near future.","authors_text":"Brennan Goddard, Chiara Bracco, Edda Gschwendtner, Felipe Pena Asmus, Francesco Velotti, Livio Verra, Marlene Turner, Patric Muggli, Spencer Gessner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-09T18:32:57Z","title":"External Electron Injection for the AWAKE Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.04202","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":"sha256:01dd6cbc4d58c8d04348d135889abb0d2a444a91a00ae119ab5ca2700b322752","target":"record","created_at":"2026-05-18T00:03:40Z","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":"9be577a491c98be1dae97c709151806543a30362b6bed49eec0dae08494f46b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-09T18:32:57Z","title_canon_sha256":"5b460da0bcb89bd0b53b54b65dd6d19afa6962ffdab85af20a0a61439dcb3945"},"schema_version":"1.0","source":{"id":"1810.04202","kind":"arxiv","version":1}},"canonical_sha256":"0a1d61dd64b2d249ddb84b5f57e4eafa1e5c412edd3d5a8095e39c73383481c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0a1d61dd64b2d249ddb84b5f57e4eafa1e5c412edd3d5a8095e39c73383481c9","first_computed_at":"2026-05-18T00:03:40.825161Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:40.825161Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ei1qEej1IRpbCBe41YdAC8IpqNwUrXx+VCubHzNqRf6M7KdAQmHCXa6/LwtGf5MtjfOlKaP+gterk18snDSyAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:40.825801Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.04202","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01dd6cbc4d58c8d04348d135889abb0d2a444a91a00ae119ab5ca2700b322752","sha256:7121f15e3c10a0ef9544e80ff4b0d8d73d2eccba5f9daae94b4b21f38d21e3e8"],"state_sha256":"4169600b59b6a22b009714903a3a8a5f965be499dd08522e32d2e597dd914228"}