{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:DE5WPZKUEBWTRFQIWAJGBMNJDC","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":"6717804bf807370723f98de249aa9fe1a1099fd6c54a75668ae718847a384fef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-07-13T18:12:31Z","title_canon_sha256":"54adee9f1161974996cec860f50be44e69253d094e801c2223824f268a7f9c5f"},"schema_version":"1.0","source":{"id":"1707.05184","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05184","created_at":"2026-05-18T00:02:55Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05184v3","created_at":"2026-05-18T00:02:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05184","created_at":"2026-05-18T00:02:55Z"},{"alias_kind":"pith_short_12","alias_value":"DE5WPZKUEBWT","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"DE5WPZKUEBWTRFQI","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"DE5WPZKU","created_at":"2026-05-18T12:31:10Z"}],"graph_snapshots":[{"event_id":"sha256:b72f6ae41fc73d2d1f57fd99b4fddc371f12173bca689e26a54b4b8a22f2e1b7","target":"graph","created_at":"2026-05-18T00:02:55Z","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":"Numerically optimised microwave pulses are used to increase excitation efficiency and modulation depth in electron spin resonance experiments performed on a spectrometer equipped with an arbitrary waveform generator. The optimisation procedure is sample-specific and reminiscent of the magnet shimming process used in the early days of nuclear magnetic resonance -- an objective function (for example, echo integral in a spin echo experiment) is defined and optimised numerically as a function of the pulse waveform vector using noise-resilient gradient-free methods. We found that the resulting shap","authors_text":"Christiane R. Timmel, David L. Goodwin, Ilya Kuprov, William K. Myers","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-07-13T18:12:31Z","title":"Feedback control optimisation of ESR experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05184","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":"sha256:84c252eb69035c71e806c4a28b310138633a68e1e63bc97d055e809f70942c8e","target":"record","created_at":"2026-05-18T00:02:55Z","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":"6717804bf807370723f98de249aa9fe1a1099fd6c54a75668ae718847a384fef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-07-13T18:12:31Z","title_canon_sha256":"54adee9f1161974996cec860f50be44e69253d094e801c2223824f268a7f9c5f"},"schema_version":"1.0","source":{"id":"1707.05184","kind":"arxiv","version":3}},"canonical_sha256":"193b67e554206d389608b01260b1a91897f0f89f63a75b5abf0f6e7b8ce9a094","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"193b67e554206d389608b01260b1a91897f0f89f63a75b5abf0f6e7b8ce9a094","first_computed_at":"2026-05-18T00:02:55.239436Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:55.239436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B75wp8PtMwPOCjB8M0OSpi3tm8v5AyVLi4h6r74eJAZ05hGX5pIEDHr+Tj9ao7MBSLSQjWuj0qlqV5uo3xj0CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:55.240067Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.05184","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:84c252eb69035c71e806c4a28b310138633a68e1e63bc97d055e809f70942c8e","sha256:b72f6ae41fc73d2d1f57fd99b4fddc371f12173bca689e26a54b4b8a22f2e1b7"],"state_sha256":"c22624645661963232fc315732cc727b827900e059c15bc50b6d7802e51aceb4"}