{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SVRA4BBTWBGSD5NYRLHNM2KX5T","short_pith_number":"pith:SVRA4BBT","canonical_record":{"source":{"id":"1310.6729","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-10-24T19:49:22Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"a5c323befabff6efdbbcb6ca58766b7840a27e050d8b9905bdcb437e32047414","abstract_canon_sha256":"ca16e197c38bb35fafd5572e309935ebd7d0829fe89b4f6db9b49598e9232f9a"},"schema_version":"1.0"},"canonical_sha256":"95620e0433b04d21f5b88aced66957ece6819a93e3ea982fd1a90c94d1bf2606","source":{"kind":"arxiv","id":"1310.6729","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.6729","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"arxiv_version","alias_value":"1310.6729v2","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.6729","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"pith_short_12","alias_value":"SVRA4BBTWBGS","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SVRA4BBTWBGSD5NY","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SVRA4BBT","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SVRA4BBTWBGSD5NYRLHNM2KX5T","target":"record","payload":{"canonical_record":{"source":{"id":"1310.6729","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-10-24T19:49:22Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"a5c323befabff6efdbbcb6ca58766b7840a27e050d8b9905bdcb437e32047414","abstract_canon_sha256":"ca16e197c38bb35fafd5572e309935ebd7d0829fe89b4f6db9b49598e9232f9a"},"schema_version":"1.0"},"canonical_sha256":"95620e0433b04d21f5b88aced66957ece6819a93e3ea982fd1a90c94d1bf2606","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:49.474644Z","signature_b64":"HvzZCap8i+7bLjs7iFItcuYgwsV7hpHp5plvQpjP04KWjm/JCJeJj5MYWo/eWww6pkZIf3uuqlA158PbFAkSCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95620e0433b04d21f5b88aced66957ece6819a93e3ea982fd1a90c94d1bf2606","last_reissued_at":"2026-05-18T02:52:49.474244Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:49.474244Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.6729","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":"2026-05-18T02:52:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4P1PskHNyE0D2JaLqU6uGzsPmYA3Kdkl8aUOH8wDNuqaIsMUkBemYcc3/kSXo4zrAGeziVpj4JmTt9clLFYkBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:20:48.157175Z"},"content_sha256":"174377d8939da3ba2cf29cbbf97fe4b45e75ee2e6a785e200f25bcf7db13d8ac","schema_version":"1.0","event_id":"sha256:174377d8939da3ba2cf29cbbf97fe4b45e75ee2e6a785e200f25bcf7db13d8ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SVRA4BBTWBGSD5NYRLHNM2KX5T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Examination of the tradeoff between intrinsic and extrinsic properties in the optimization of a modern internal tin Nb3Sn conductor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Ghosh, C. Tarantini, D.C. Larbalestier, N. Craig, P.J. Lee","submitted_at":"2013-10-24T19:49:22Z","abstract_excerpt":"In modern Nb3Sn wires there is a fundamental compromise to be made between optimizing the intrinsic properties associated with the superfluid density in the A15 phase (e.g. Tc, Hc, Hc2, all of which are composition dependent), maximizing the quantity of A15 that can be formed from a given mixture of Nb, Sn and Cu, minimizing the A15 composition gradients within each sub-element, while at the same time generating a high vortex pinning critical current density, Jc, by maximizing the grain boundary density with the additional constraint of maintaining the RRR of the Cu stabilizer above 100. Here "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.6729","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":""},"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":"2026-05-18T02:52:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cgtgM80YCnEZ5b+rd8KkUZdlBRJfHrSsPpGDZBmhzOHqa2c9cO2YEO3L0J62nynmXB5VQmGqPLdBxuQrBGObAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:20:48.157556Z"},"content_sha256":"17fb5d3c3248060563dcda9b16a208410fba0305c4a3e317bc41b017014efdcf","schema_version":"1.0","event_id":"sha256:17fb5d3c3248060563dcda9b16a208410fba0305c4a3e317bc41b017014efdcf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/bundle.json","state_url":"https://pith.science/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/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":"2026-06-02T15:20:48Z","links":{"resolver":"https://pith.science/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T","bundle":"https://pith.science/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/bundle.json","state":"https://pith.science/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SVRA4BBTWBGSD5NYRLHNM2KX5T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SVRA4BBTWBGSD5NYRLHNM2KX5T","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":"ca16e197c38bb35fafd5572e309935ebd7d0829fe89b4f6db9b49598e9232f9a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-10-24T19:49:22Z","title_canon_sha256":"a5c323befabff6efdbbcb6ca58766b7840a27e050d8b9905bdcb437e32047414"},"schema_version":"1.0","source":{"id":"1310.6729","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.6729","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"arxiv_version","alias_value":"1310.6729v2","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.6729","created_at":"2026-05-18T02:52:49Z"},{"alias_kind":"pith_short_12","alias_value":"SVRA4BBTWBGS","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SVRA4BBTWBGSD5NY","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SVRA4BBT","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:17fb5d3c3248060563dcda9b16a208410fba0305c4a3e317bc41b017014efdcf","target":"graph","created_at":"2026-05-18T02:52:49Z","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":"In modern Nb3Sn wires there is a fundamental compromise to be made between optimizing the intrinsic properties associated with the superfluid density in the A15 phase (e.g. Tc, Hc, Hc2, all of which are composition dependent), maximizing the quantity of A15 that can be formed from a given mixture of Nb, Sn and Cu, minimizing the A15 composition gradients within each sub-element, while at the same time generating a high vortex pinning critical current density, Jc, by maximizing the grain boundary density with the additional constraint of maintaining the RRR of the Cu stabilizer above 100. Here ","authors_text":"A. Ghosh, C. Tarantini, D.C. Larbalestier, N. Craig, P.J. Lee","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-10-24T19:49:22Z","title":"Examination of the tradeoff between intrinsic and extrinsic properties in the optimization of a modern internal tin Nb3Sn conductor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.6729","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":"sha256:174377d8939da3ba2cf29cbbf97fe4b45e75ee2e6a785e200f25bcf7db13d8ac","target":"record","created_at":"2026-05-18T02:52:49Z","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":"ca16e197c38bb35fafd5572e309935ebd7d0829fe89b4f6db9b49598e9232f9a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-10-24T19:49:22Z","title_canon_sha256":"a5c323befabff6efdbbcb6ca58766b7840a27e050d8b9905bdcb437e32047414"},"schema_version":"1.0","source":{"id":"1310.6729","kind":"arxiv","version":2}},"canonical_sha256":"95620e0433b04d21f5b88aced66957ece6819a93e3ea982fd1a90c94d1bf2606","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95620e0433b04d21f5b88aced66957ece6819a93e3ea982fd1a90c94d1bf2606","first_computed_at":"2026-05-18T02:52:49.474244Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:49.474244Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HvzZCap8i+7bLjs7iFItcuYgwsV7hpHp5plvQpjP04KWjm/JCJeJj5MYWo/eWww6pkZIf3uuqlA158PbFAkSCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:49.474644Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.6729","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:174377d8939da3ba2cf29cbbf97fe4b45e75ee2e6a785e200f25bcf7db13d8ac","sha256:17fb5d3c3248060563dcda9b16a208410fba0305c4a3e317bc41b017014efdcf"],"state_sha256":"63931316979d5d101e4eb3e36b67ede0e1bd000e5576de3551b0eba18a6f18da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EFCABOW70XmssWYhsFh9JjuQ5eQOTDOxX9JcHJnu5NZGJlWeHRUuXWlwIoVHxOcfK2o5MriX/OwRonG0u6/wDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:20:48.159605Z","bundle_sha256":"479d52c2ce689d4e9a78863235e51a51854d12f044a723f0161ef952d2af05b8"}}