{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4FTPBFGM65EUQQC67F3UEOJ37C","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":"0ba4c5ba8ede3ac0d1c34333a4abb4cf4b344e393cc6c6561350f8f5c9ce731c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-08-02T19:10:44Z","title_canon_sha256":"eb901fb12e2efdf543b1aea3320c90e0611e91869791f93560f18c053c25a388"},"schema_version":"1.0","source":{"id":"1908.01019","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.01019","created_at":"2026-07-05T00:13:52Z"},{"alias_kind":"arxiv_version","alias_value":"1908.01019v1","created_at":"2026-07-05T00:13:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.01019","created_at":"2026-07-05T00:13:52Z"},{"alias_kind":"pith_short_12","alias_value":"4FTPBFGM65EU","created_at":"2026-07-05T00:13:52Z"},{"alias_kind":"pith_short_16","alias_value":"4FTPBFGM65EUQQC6","created_at":"2026-07-05T00:13:52Z"},{"alias_kind":"pith_short_8","alias_value":"4FTPBFGM","created_at":"2026-07-05T00:13:52Z"}],"graph_snapshots":[{"event_id":"sha256:fb803e0598f281602c937e739bd9ace5dcf38a211ffeae9dd50434e1463524d4","target":"graph","created_at":"2026-07-05T00:13:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.01019/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report an analysis of electron-optical properties of a toroidal magnetic sector spectrometer and examine parameters for its implementation in a relativistic heavy-ion storage ring like HESR. For studies of free-free pair production in heavy-ion atom collisions this spectrometer exhibits very high efficiencies for coincident $e^+e^-$ pair spectroscopy over a wide range of momenta of emitted lepton pairs. The high coincidence efficiency of the spectrometer is the key for stringent tests of theoretical predictions for the coincident positron- and electron- emission characteristics and for the ","authors_text":"Pierre-Michel Hillenbrand, Siegbert Hagmann, Thomas St\\\"ohlker, Uwe Spillmann, Yurij Litvinov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-08-02T19:10:44Z","title":"The Magnetic Toroidal Sector as A broad-band Electron-Positron Pair Spectrometer I. Lepton Trajectories"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.01019","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":"sha256:6794caed0279ec6f0d9da79bc68639d7b794eaa5f7c7b76571f9338877213f81","target":"record","created_at":"2026-07-05T00:13:52Z","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":"0ba4c5ba8ede3ac0d1c34333a4abb4cf4b344e393cc6c6561350f8f5c9ce731c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-08-02T19:10:44Z","title_canon_sha256":"eb901fb12e2efdf543b1aea3320c90e0611e91869791f93560f18c053c25a388"},"schema_version":"1.0","source":{"id":"1908.01019","kind":"arxiv","version":1}},"canonical_sha256":"e166f094ccf74948405ef97742393bf8974cf69acd2dd92284a713b0225fe169","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e166f094ccf74948405ef97742393bf8974cf69acd2dd92284a713b0225fe169","first_computed_at":"2026-07-05T00:13:52.477911Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:13:52.477911Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KT5uGpCQzLibQ/od9imqawn2wUE2WoE354da8v6tIQIn35/zgIUtO0zRiR7W2g41azdTd+CREUGogpkgYdvCCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:13:52.478307Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.01019","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6794caed0279ec6f0d9da79bc68639d7b794eaa5f7c7b76571f9338877213f81","sha256:fb803e0598f281602c937e739bd9ace5dcf38a211ffeae9dd50434e1463524d4"],"state_sha256":"cc563035b4139754dfd2eaf13a5dd6b5cf46708bfe8bcec24947994b7ff0d68d"}