{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:UY4TVYRDU7B5YEVCLC4U7RVNRS","short_pith_number":"pith:UY4TVYRD","canonical_record":{"source":{"id":"1908.08614","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-22T22:45:17Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"5750557c06c6e1a59fb004f53d959d426579971650b1eaee3fdbdd8738784b97","abstract_canon_sha256":"0c5fef6e4086d11011de8640ec0f4d14fa5aa87e620550e56a89ad67be5b2cf5"},"schema_version":"1.0"},"canonical_sha256":"a6393ae223a7c3dc12a258b94fc6ad8ca79fe5df3e42dc0118946c9f1f715e99","source":{"kind":"arxiv","id":"1908.08614","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08614","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08614v2","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08614","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_12","alias_value":"UY4TVYRDU7B5","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_16","alias_value":"UY4TVYRDU7B5YEVC","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_8","alias_value":"UY4TVYRD","created_at":"2026-07-05T00:24:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:UY4TVYRDU7B5YEVCLC4U7RVNRS","target":"record","payload":{"canonical_record":{"source":{"id":"1908.08614","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-22T22:45:17Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"5750557c06c6e1a59fb004f53d959d426579971650b1eaee3fdbdd8738784b97","abstract_canon_sha256":"0c5fef6e4086d11011de8640ec0f4d14fa5aa87e620550e56a89ad67be5b2cf5"},"schema_version":"1.0"},"canonical_sha256":"a6393ae223a7c3dc12a258b94fc6ad8ca79fe5df3e42dc0118946c9f1f715e99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:24:09.485934Z","signature_b64":"wXP3NTvJDaLZWfnFs+YkfHAGcOEuPOztiRyB26j2MQ9zXzKnPjyH53aUbR22YQOJ/5NHIY82+nRJi7A2e5TaDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6393ae223a7c3dc12a258b94fc6ad8ca79fe5df3e42dc0118946c9f1f715e99","last_reissued_at":"2026-07-05T00:24:09.485280Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:24:09.485280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.08614","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:24:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hNOzbti+SK5vdVy6CfQoaY9alObQ5Ke7i9/zH2Or5KkrgT26nH9dbvuyREgVCl9odItxjpw3csDCPhBQl+TPDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:07:12.610937Z"},"content_sha256":"f202b7168ea005e3f82deb9a80a315249070dda7b07f8981f6df2ade0f04aaa1","schema_version":"1.0","event_id":"sha256:f202b7168ea005e3f82deb9a80a315249070dda7b07f8981f6df2ade0f04aaa1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:UY4TVYRDU7B5YEVCLC4U7RVNRS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Composite stacks for reliable > 17 T trapped fields in bulk superconductor magnets","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"physics.app-ph","authors_text":"Anthony R Dennis, David A Cardwell, Devendra K Namburi, Difan Zhou, Eric E Hellstrom, Jan Jaroszynski, Jan Srp\\v{c}i\\v{c}, John H Durrell, Kai Yuan Huang, Mark D Ainslie, Martin Boll, Mykhaylo Filipenko, Yunhua Shi","submitted_at":"2019-08-22T22:45:17Z","abstract_excerpt":"Trapped fields of over 20 T are, in principle, achievable in bulk, single-grain high temperature cuprate superconductors. The principle barriers to realizing such performance are, firstly, the large tensile stresses that develop during the magnetization of such trapped-field magnets as a result of the Lorentz force, which lead to brittle fracture of these ceramic-like materials at high fields and, secondly, catastrophic thermal instabilities as a result of flux movement during magnetization. Moreover, for a batch of samples nominally fabricated identically, the statistical nature of the failur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08614","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.08614/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:24:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IFdcctR/CzsibutkF9/fk+75zO/GE5Gvp4wDIh3GD9dmCk0hXFZELBUb9w/wY6byRI1lJQN/e/PBAL9Q3HPFBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:07:12.611442Z"},"content_sha256":"031de3350984b366b8e1f31813f0eccfb4c1edb8532fa74042976712772e7a93","schema_version":"1.0","event_id":"sha256:031de3350984b366b8e1f31813f0eccfb4c1edb8532fa74042976712772e7a93"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/bundle.json","state_url":"https://pith.science/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-16T08:07:12Z","links":{"resolver":"https://pith.science/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS","bundle":"https://pith.science/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/bundle.json","state":"https://pith.science/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UY4TVYRDU7B5YEVCLC4U7RVNRS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UY4TVYRDU7B5YEVCLC4U7RVNRS","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":"0c5fef6e4086d11011de8640ec0f4d14fa5aa87e620550e56a89ad67be5b2cf5","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-22T22:45:17Z","title_canon_sha256":"5750557c06c6e1a59fb004f53d959d426579971650b1eaee3fdbdd8738784b97"},"schema_version":"1.0","source":{"id":"1908.08614","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08614","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08614v2","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08614","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_12","alias_value":"UY4TVYRDU7B5","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_16","alias_value":"UY4TVYRDU7B5YEVC","created_at":"2026-07-05T00:24:09Z"},{"alias_kind":"pith_short_8","alias_value":"UY4TVYRD","created_at":"2026-07-05T00:24:09Z"}],"graph_snapshots":[{"event_id":"sha256:031de3350984b366b8e1f31813f0eccfb4c1edb8532fa74042976712772e7a93","target":"graph","created_at":"2026-07-05T00:24:09Z","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/1908.08614/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Trapped fields of over 20 T are, in principle, achievable in bulk, single-grain high temperature cuprate superconductors. The principle barriers to realizing such performance are, firstly, the large tensile stresses that develop during the magnetization of such trapped-field magnets as a result of the Lorentz force, which lead to brittle fracture of these ceramic-like materials at high fields and, secondly, catastrophic thermal instabilities as a result of flux movement during magnetization. Moreover, for a batch of samples nominally fabricated identically, the statistical nature of the failur","authors_text":"Anthony R Dennis, David A Cardwell, Devendra K Namburi, Difan Zhou, Eric E Hellstrom, Jan Jaroszynski, Jan Srp\\v{c}i\\v{c}, John H Durrell, Kai Yuan Huang, Mark D Ainslie, Martin Boll, Mykhaylo Filipenko, Yunhua Shi","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-22T22:45:17Z","title":"Composite stacks for reliable > 17 T trapped fields in bulk superconductor magnets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08614","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:f202b7168ea005e3f82deb9a80a315249070dda7b07f8981f6df2ade0f04aaa1","target":"record","created_at":"2026-07-05T00:24:09Z","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":"0c5fef6e4086d11011de8640ec0f4d14fa5aa87e620550e56a89ad67be5b2cf5","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-22T22:45:17Z","title_canon_sha256":"5750557c06c6e1a59fb004f53d959d426579971650b1eaee3fdbdd8738784b97"},"schema_version":"1.0","source":{"id":"1908.08614","kind":"arxiv","version":2}},"canonical_sha256":"a6393ae223a7c3dc12a258b94fc6ad8ca79fe5df3e42dc0118946c9f1f715e99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6393ae223a7c3dc12a258b94fc6ad8ca79fe5df3e42dc0118946c9f1f715e99","first_computed_at":"2026-07-05T00:24:09.485280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:24:09.485280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wXP3NTvJDaLZWfnFs+YkfHAGcOEuPOztiRyB26j2MQ9zXzKnPjyH53aUbR22YQOJ/5NHIY82+nRJi7A2e5TaDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:24:09.485934Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.08614","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f202b7168ea005e3f82deb9a80a315249070dda7b07f8981f6df2ade0f04aaa1","sha256:031de3350984b366b8e1f31813f0eccfb4c1edb8532fa74042976712772e7a93"],"state_sha256":"ff0a5d2a86ac0d1bd24ef3b0e482deb6b92a3eac1e0c2f79b67bf5bfe7b7645f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q4eYmE7DteGJVAY0VLhtRAlFsATPmj8EmAzXFEaVK9xMQuofQr0UySalIvyNB4g5SCU7EYGK+6H73rng32PpCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T08:07:12.615546Z","bundle_sha256":"120ea157315db91ae17698f77715d9d4f8b43aae131c329afc2ec5ba0976e645"}}