{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KYKSI2ALORD2PJZ2I7GUNMIARA","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":"146615d8c04cf5c1a4b0721785971503328768225302625ada2927920f68dd02","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2012-02-13T20:59:07Z","title_canon_sha256":"f76e62beffdea700a61cad31146c389c8e63f6e6ffcfc17b5df649cf381d5d0e"},"schema_version":"1.0","source":{"id":"1202.2848","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2848","created_at":"2026-05-18T01:58:29Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2848v3","created_at":"2026-05-18T01:58:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2848","created_at":"2026-05-18T01:58:29Z"},{"alias_kind":"pith_short_12","alias_value":"KYKSI2ALORD2","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KYKSI2ALORD2PJZ2","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KYKSI2AL","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:652e648d9d6916bc432d290f4bc6108b98a27b8c5d1324838dc23980b177fc4c","target":"graph","created_at":"2026-05-18T01:58:29Z","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":"In simulations of a 10PW laser striking a solid we demonstrate the possibility of producing a pure electron-positron plasma by the same processes as those thought to operate in high-energy astrophysical environments. A maximum positron density of 10^26/m^3 is achieved, seven orders of magnitude greater than achieved in previous experiments. Additionally, 35% of the laser energy is converted to a burst of gamma-rays of intensity 10^22W/cm^2, potentially the most intense gamma-ray source available in the laboratory. This absorption results in a strong feedback between both pair and gamma-ray pro","authors_text":"A. P. L. Robinson, A. R. Bell, C. P. Ridgers, C. S. Brady, J. G. Kirk, K. Bennett, R. Duclous, T. D. Arber","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2012-02-13T20:59:07Z","title":"Dense Electron-Positron Plasmas and Ultra-Intense Bursts of Gamma-Rays from Laser-Irradiated Solids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2848","kind":"arxiv","version":3},"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":"sha256:8936c5665c4643fca64f7d48c894049a670c04871c57a18e7cdb8197fac7567a","target":"record","created_at":"2026-05-18T01:58:29Z","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":"146615d8c04cf5c1a4b0721785971503328768225302625ada2927920f68dd02","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2012-02-13T20:59:07Z","title_canon_sha256":"f76e62beffdea700a61cad31146c389c8e63f6e6ffcfc17b5df649cf381d5d0e"},"schema_version":"1.0","source":{"id":"1202.2848","kind":"arxiv","version":3}},"canonical_sha256":"561524680b7447a7a73a47cd46b10088265f273b0a4aa5379f3437c5871bb570","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"561524680b7447a7a73a47cd46b10088265f273b0a4aa5379f3437c5871bb570","first_computed_at":"2026-05-18T01:58:29.049220Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:29.049220Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gx5WBAcZd2geYu8P6NGWUlJwFutkMiTCbQZ4Ds3MSp1hehRtYcNAb6V1x+nK9AU/utcCngN3++ra8/QSdxQtAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:29.049692Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2848","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8936c5665c4643fca64f7d48c894049a670c04871c57a18e7cdb8197fac7567a","sha256:652e648d9d6916bc432d290f4bc6108b98a27b8c5d1324838dc23980b177fc4c"],"state_sha256":"35333fb6c826b8dc8dce090598626be9e91a16e208bc0588adc129ce845a681f"}