{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2UCLK3J3DF2BORBITRW3A2NALX","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":"7eda9deb31b7d2ecf9ca9304e857a92884611f876b4d3700cdb0c3ce19022b16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-09-20T08:45:53Z","title_canon_sha256":"0d0352bfd3c7069befe33187623764ec12aca2770e45918dc5412ba7d235fc6f"},"schema_version":"1.0","source":{"id":"1809.07531","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07531","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07531v1","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07531","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"pith_short_12","alias_value":"2UCLK3J3DF2B","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2UCLK3J3DF2BORBI","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2UCLK3J3","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:c70a49fc351a8bc3e4165d5de71d69853e996ced50f5d33965bc38f511362704","target":"graph","created_at":"2026-05-17T23:54:10Z","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":"A new scheme of proton acceleration from a laser-driven near-critical-density plasma is proposed. Plasma with a tailored density profile allows a two-stage acceleration of protons. The protons are pre-accelerated in the laser-driven wakefields, and are then further accelerated by the collisionless shock, launched from the rear side of the plasma. The shock has a small transverse size, and it generates a strong space-charge field, which defocuses protons in such a way, that only those protons with the highest energies and low energy spread remains collimated. Theoretical and numerical analysis ","authors_text":"C.-H. Pai, C. Joshi, I.A. Andriyash, J.F. Hua, V. Malka, W.B. Mori, W. Lu, Y. Wan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-09-20T08:45:53Z","title":"Staged laser acceleration of high quality protons from a tailored plasma"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07531","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":"sha256:5e37a3cd0928d7b711fd656b466a509080569f15cf876563d538b8dfa8cb7383","target":"record","created_at":"2026-05-17T23:54:10Z","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":"7eda9deb31b7d2ecf9ca9304e857a92884611f876b4d3700cdb0c3ce19022b16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-09-20T08:45:53Z","title_canon_sha256":"0d0352bfd3c7069befe33187623764ec12aca2770e45918dc5412ba7d235fc6f"},"schema_version":"1.0","source":{"id":"1809.07531","kind":"arxiv","version":1}},"canonical_sha256":"d504b56d3b19741744289c6db069a05dd3ff33f2c69c96131f282a3ad01def35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d504b56d3b19741744289c6db069a05dd3ff33f2c69c96131f282a3ad01def35","first_computed_at":"2026-05-17T23:54:10.932111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:10.932111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sOksg0Ov6Hl8xkTnJ93OtjdfLW9z9NGIh8GgXBpF9po7bIed36VNuksrSXES8P14dwJPqX0kb83fjoo4GH8CBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:10.932687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.07531","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e37a3cd0928d7b711fd656b466a509080569f15cf876563d538b8dfa8cb7383","sha256:c70a49fc351a8bc3e4165d5de71d69853e996ced50f5d33965bc38f511362704"],"state_sha256":"ff5e728fe6d713a4dcd836886c0214379791133dc38f353c60b886565597a6d7"}