{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:F4KBNJ2QUYRQPJIFUKZY74GJOJ","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":"599a528ae3a46bb2036006c4c5846d66bc484d8b918af43e8efa74acaa43b726","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-20T08:38:34Z","title_canon_sha256":"eb1dd8092c0f0f48d4998c29593eb5a1277bb1ecbcb909852434530513e9bc72"},"schema_version":"1.0","source":{"id":"1804.07488","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.07488","created_at":"2026-05-18T00:09:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.07488v2","created_at":"2026-05-18T00:09:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.07488","created_at":"2026-05-18T00:09:14Z"},{"alias_kind":"pith_short_12","alias_value":"F4KBNJ2QUYRQ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"F4KBNJ2QUYRQPJIF","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"F4KBNJ2Q","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:8e0c4044e1a32de669bf3c0bb8e10aef3bcf1bb579c11857c358a6b214d03308","target":"graph","created_at":"2026-05-18T00:09:14Z","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 describe how active feedback routines can be applied at limited repetition rate (5 Hz) to optimize high-power $>10$ TW) laser interactions with clustered gases. Optimization of x-ray production from an argon cluster jet, using a genetic algorithm, approximately doubled the measured energy through temporal modification of the 150 mJ driving laser pulse. This approach achieved an increased radiation yield through exploration of a multi-dimensional parameter space, without requiring detailed a priori knowledge of the complex cluster dynamics. The optimized laser pulses exhibited a slow rising ","authors_text":"A. G. R. Thomas, B. Parry, C. D. Baird, C. D. Gregory, C. D. Murphy, C. J. Hooker, C. Thornton, D. Hazra, D. R. Symes, E. Springate, J. D. E. Scott, J. Hah, J.-N. Gruse, M. J. V. Streeter, M. Krishnamurthy, N. Bourgeois, O. Chekhlov, P. Pourmoussavi, P. P. Rajeev, R. A. Smith, S. Eardley, S. J. D. Dann, S. J. Hawkes, S. P. D. Mangles, S. Rozario, S. Tata, S.V. Rahul, V. A. Marshall, Y. Tang, Z. Najmudin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-20T08:38:34Z","title":"Temporal Feedback Control of High-Intensity Laser Pulses to Optimize Ultrafast Heating of Atomic Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.07488","kind":"arxiv","version":2},"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":"sha256:328c73756f61112d9bc3d72daf1d22f8822cbe7ec796a62756d3038e9a3ce24c","target":"record","created_at":"2026-05-18T00:09:14Z","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":"599a528ae3a46bb2036006c4c5846d66bc484d8b918af43e8efa74acaa43b726","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-20T08:38:34Z","title_canon_sha256":"eb1dd8092c0f0f48d4998c29593eb5a1277bb1ecbcb909852434530513e9bc72"},"schema_version":"1.0","source":{"id":"1804.07488","kind":"arxiv","version":2}},"canonical_sha256":"2f1416a750a62307a505a2b38ff0c97241253cf112f935400dfa500335e239b9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f1416a750a62307a505a2b38ff0c97241253cf112f935400dfa500335e239b9","first_computed_at":"2026-05-18T00:09:14.576850Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:14.576850Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rOJcJ2qD3A8MamdUEVrmzxVgo+wi0PQ9ljabd5NWctWnCMJ7bic/DVOb/lmxuEZOmBjhyT16af9KxsbVWp5OAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:14.577639Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.07488","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:328c73756f61112d9bc3d72daf1d22f8822cbe7ec796a62756d3038e9a3ce24c","sha256:8e0c4044e1a32de669bf3c0bb8e10aef3bcf1bb579c11857c358a6b214d03308"],"state_sha256":"896317cf2659feecbbf474bb3c2a8d99f726ed9bccac4e93b8a6ef36f01a4804"}