{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:2W4AWVUTW7HVJZFY4DYAES2B5S","short_pith_number":"pith:2W4AWVUT","schema_version":"1.0","canonical_sha256":"d5b80b5693b7cf54e4b8e0f0024b41ec884299183ffaad8b4dbb19d736e8428d","source":{"kind":"arxiv","id":"2205.13632","version":1},"attestation_state":"computed","paper":{"title":"Operation of Cs-Sb-O activated GaAs in a high voltage DC electron gun at high average current","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Adam Bartnik, Alice Galdi, Ivan Bazarov, Jai Kwan Bae, Jared Maxson, Luca Cultrera, Matthew Andorf","submitted_at":"2022-05-26T21:05:50Z","abstract_excerpt":"Negative Electron Affinity (NEA) activated GaAs photocathodes are the most popular option for generating a high current (> 1 mA) spin-polarized electron beam. Despite its popularity, a short operational lifetime is the main drawback of this material. Recent works have shown that the lifetime can be improved by using a robust Cs-Sb-O NEA layer with minimal adverse effects. In this work, we operate GaAs photocathodes with this new activation method in a high voltage environment to extract a high current. We observed spectral dependence on the lifetime improvement. In particular, we saw a 45% inc"},"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":"2205.13632","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2022-05-26T21:05:50Z","cross_cats_sorted":[],"title_canon_sha256":"a64270013a074fb4ad3a38d664805fdd39c5399c4e2b0c591df7e61d3aff9e24","abstract_canon_sha256":"a19e77fc5aae6b24e8d91990334b308b4d5adfacebeeef3f3b319b688fed4d32"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:30:00.549853Z","signature_b64":"7qDWSNryTRVAOtvseS3eD3e94RSEbOmiYB4K77jLkXG/bjoxWOXJFgOZDL1Fr0rOPolKNtc/d7TGTLtAFQiSBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5b80b5693b7cf54e4b8e0f0024b41ec884299183ffaad8b4dbb19d736e8428d","last_reissued_at":"2026-07-05T08:30:00.549348Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:30:00.549348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Operation of Cs-Sb-O activated GaAs in a high voltage DC electron gun at high average current","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Adam Bartnik, Alice Galdi, Ivan Bazarov, Jai Kwan Bae, Jared Maxson, Luca Cultrera, Matthew Andorf","submitted_at":"2022-05-26T21:05:50Z","abstract_excerpt":"Negative Electron Affinity (NEA) activated GaAs photocathodes are the most popular option for generating a high current (> 1 mA) spin-polarized electron beam. Despite its popularity, a short operational lifetime is the main drawback of this material. Recent works have shown that the lifetime can be improved by using a robust Cs-Sb-O NEA layer with minimal adverse effects. In this work, we operate GaAs photocathodes with this new activation method in a high voltage environment to extract a high current. We observed spectral dependence on the lifetime improvement. In particular, we saw a 45% inc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.13632","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/2205.13632/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":"2205.13632","created_at":"2026-07-05T08:30:00.549409+00:00"},{"alias_kind":"arxiv_version","alias_value":"2205.13632v1","created_at":"2026-07-05T08:30:00.549409+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.13632","created_at":"2026-07-05T08:30:00.549409+00:00"},{"alias_kind":"pith_short_12","alias_value":"2W4AWVUTW7HV","created_at":"2026-07-05T08:30:00.549409+00:00"},{"alias_kind":"pith_short_16","alias_value":"2W4AWVUTW7HVJZFY","created_at":"2026-07-05T08:30:00.549409+00:00"},{"alias_kind":"pith_short_8","alias_value":"2W4AWVUT","created_at":"2026-07-05T08:30:00.549409+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/2W4AWVUTW7HVJZFY4DYAES2B5S","json":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S.json","graph_json":"https://pith.science/api/pith-number/2W4AWVUTW7HVJZFY4DYAES2B5S/graph.json","events_json":"https://pith.science/api/pith-number/2W4AWVUTW7HVJZFY4DYAES2B5S/events.json","paper":"https://pith.science/paper/2W4AWVUT"},"agent_actions":{"view_html":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S","download_json":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S.json","view_paper":"https://pith.science/paper/2W4AWVUT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2205.13632&json=true","fetch_graph":"https://pith.science/api/pith-number/2W4AWVUTW7HVJZFY4DYAES2B5S/graph.json","fetch_events":"https://pith.science/api/pith-number/2W4AWVUTW7HVJZFY4DYAES2B5S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S/action/storage_attestation","attest_author":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S/action/author_attestation","sign_citation":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S/action/citation_signature","submit_replication":"https://pith.science/pith/2W4AWVUTW7HVJZFY4DYAES2B5S/action/replication_record"}},"created_at":"2026-07-05T08:30:00.549409+00:00","updated_at":"2026-07-05T08:30:00.549409+00:00"}