{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:ZH6VEBBV54P56C4I3QOUMYD6Y4","short_pith_number":"pith:ZH6VEBBV","schema_version":"1.0","canonical_sha256":"c9fd520435ef1fdf0b88dc1d46607ec7293b11d82a3eadc5c96c71715785e2ec","source":{"kind":"arxiv","id":"1901.01821","version":1},"attestation_state":"computed","paper":{"title":"Large energy acceptance gantry for proton therapy utilizing superconducting technology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"C. Calzolaio, D. Meer, J. M. Schippers, K. P. Nesteruk, M. Seidel, V. Rizzoglio","submitted_at":"2019-01-07T14:13:25Z","abstract_excerpt":"When using superconducting (SC) magnets in a gantry for proton therapy, the gantry will benefit from some reduction in size and a large reduction in weight. In this contribution we show an important additional advantage of SC magnets in proton therapy treatments. We present the design of a gantry with a SC bending section and achromatic beam optics with a very large beam momentum acceptance of $\\pm15\\%$. Due to the related very large energy acceptance, approximately 70% of the treatments can be performed without changing the magnetic field for synchronization with energy modulation. In our des"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1901.01821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-01-07T14:13:25Z","cross_cats_sorted":[],"title_canon_sha256":"931156f3dc132749a1635d1bb895e560741821226959796520ba0907bf93a435","abstract_canon_sha256":"9817bdf7596b83f20ef896b6913c97d14ee8eaa6bd4c1620248741790b61b161"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:32:29.625273Z","signature_b64":"xqJmEcGZt0T8YyCPt1JQgYH6ZuQPJZUH3KJeGFZruxZ5B/TKCUDsQZCWxzLJ9re/Uuv2LCL72GVc/rsU7PcgDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9fd520435ef1fdf0b88dc1d46607ec7293b11d82a3eadc5c96c71715785e2ec","last_reissued_at":"2026-07-05T00:32:29.624848Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:32:29.624848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Large energy acceptance gantry for proton therapy utilizing superconducting technology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"C. Calzolaio, D. Meer, J. M. Schippers, K. P. Nesteruk, M. Seidel, V. Rizzoglio","submitted_at":"2019-01-07T14:13:25Z","abstract_excerpt":"When using superconducting (SC) magnets in a gantry for proton therapy, the gantry will benefit from some reduction in size and a large reduction in weight. In this contribution we show an important additional advantage of SC magnets in proton therapy treatments. We present the design of a gantry with a SC bending section and achromatic beam optics with a very large beam momentum acceptance of $\\pm15\\%$. Due to the related very large energy acceptance, approximately 70% of the treatments can be performed without changing the magnetic field for synchronization with energy modulation. In our des"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.01821","kind":"arxiv","version":1},"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/1901.01821/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1901.01821","created_at":"2026-07-05T00:32:29.624903+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.01821v1","created_at":"2026-07-05T00:32:29.624903+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.01821","created_at":"2026-07-05T00:32:29.624903+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZH6VEBBV54P5","created_at":"2026-07-05T00:32:29.624903+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZH6VEBBV54P56C4I","created_at":"2026-07-05T00:32:29.624903+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZH6VEBBV","created_at":"2026-07-05T00:32:29.624903+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4","json":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4.json","graph_json":"https://pith.science/api/pith-number/ZH6VEBBV54P56C4I3QOUMYD6Y4/graph.json","events_json":"https://pith.science/api/pith-number/ZH6VEBBV54P56C4I3QOUMYD6Y4/events.json","paper":"https://pith.science/paper/ZH6VEBBV"},"agent_actions":{"view_html":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4","download_json":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4.json","view_paper":"https://pith.science/paper/ZH6VEBBV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.01821&json=true","fetch_graph":"https://pith.science/api/pith-number/ZH6VEBBV54P56C4I3QOUMYD6Y4/graph.json","fetch_events":"https://pith.science/api/pith-number/ZH6VEBBV54P56C4I3QOUMYD6Y4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4/action/storage_attestation","attest_author":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4/action/author_attestation","sign_citation":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4/action/citation_signature","submit_replication":"https://pith.science/pith/ZH6VEBBV54P56C4I3QOUMYD6Y4/action/replication_record"}},"created_at":"2026-07-05T00:32:29.624903+00:00","updated_at":"2026-07-05T00:32:29.624903+00:00"}