{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:YRW3WUPWCMAX6UBOTBS6TRJELZ","short_pith_number":"pith:YRW3WUPW","schema_version":"1.0","canonical_sha256":"c46dbb51f613017f502e9865e9c5245e50183755457c2f626d238440e780345f","source":{"kind":"arxiv","id":"1408.5088","version":1},"attestation_state":"computed","paper":{"title":"Ultrastable low-noise current amplifier","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Christian Krause, Dietmar Drung, Franz Josef Ahlers, Hansj\\\"org Scherer, Ulrich Becker","submitted_at":"2014-08-21T17:59:39Z","abstract_excerpt":"An ultrastable low-noise current amplifier (ULCA) is presented. The ULCA is a non-cryogenic instrument based on specially designed operational amplifiers and resistor networks. It involves two stages, the first providing a 1000-fold current gain and the second performing a current-to-voltage conversion via an internal 1 MOhm reference resistor or, optionally, an external standard resistor. The ULCA's transfer coefficient is extremely stable versus time, temperature and current amplitude within the full dynamic range of +/-5 nA. A low noise level of 2.4 fA/sqrt(Hz) helps to keep averaging times"},"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":"1408.5088","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-08-21T17:59:39Z","cross_cats_sorted":[],"title_canon_sha256":"0a78575b7861f414665f67632694e41cd3189f8976dd00d86277b889ad0c8cb7","abstract_canon_sha256":"7e7e522f048a3d526263cec9438fb27bbacf50b893925c2051576e3f6aa8c936"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:44:40.762929Z","signature_b64":"feGwqM/su6+fzjIQDzkDmf0jWaCl/zbMHzQDz3YnollKxiy2mOtoCPC7fsF9oZRtYed04ystV+XkL7zYV+qVCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c46dbb51f613017f502e9865e9c5245e50183755457c2f626d238440e780345f","last_reissued_at":"2026-05-18T02:44:40.762306Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:44:40.762306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ultrastable low-noise current amplifier","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Christian Krause, Dietmar Drung, Franz Josef Ahlers, Hansj\\\"org Scherer, Ulrich Becker","submitted_at":"2014-08-21T17:59:39Z","abstract_excerpt":"An ultrastable low-noise current amplifier (ULCA) is presented. The ULCA is a non-cryogenic instrument based on specially designed operational amplifiers and resistor networks. It involves two stages, the first providing a 1000-fold current gain and the second performing a current-to-voltage conversion via an internal 1 MOhm reference resistor or, optionally, an external standard resistor. The ULCA's transfer coefficient is extremely stable versus time, temperature and current amplitude within the full dynamic range of +/-5 nA. A low noise level of 2.4 fA/sqrt(Hz) helps to keep averaging times"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5088","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":""},"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":"1408.5088","created_at":"2026-05-18T02:44:40.762408+00:00"},{"alias_kind":"arxiv_version","alias_value":"1408.5088v1","created_at":"2026-05-18T02:44:40.762408+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5088","created_at":"2026-05-18T02:44:40.762408+00:00"},{"alias_kind":"pith_short_12","alias_value":"YRW3WUPWCMAX","created_at":"2026-05-18T12:28:57.508820+00:00"},{"alias_kind":"pith_short_16","alias_value":"YRW3WUPWCMAX6UBO","created_at":"2026-05-18T12:28:57.508820+00:00"},{"alias_kind":"pith_short_8","alias_value":"YRW3WUPW","created_at":"2026-05-18T12:28:57.508820+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/YRW3WUPWCMAX6UBOTBS6TRJELZ","json":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ.json","graph_json":"https://pith.science/api/pith-number/YRW3WUPWCMAX6UBOTBS6TRJELZ/graph.json","events_json":"https://pith.science/api/pith-number/YRW3WUPWCMAX6UBOTBS6TRJELZ/events.json","paper":"https://pith.science/paper/YRW3WUPW"},"agent_actions":{"view_html":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ","download_json":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ.json","view_paper":"https://pith.science/paper/YRW3WUPW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1408.5088&json=true","fetch_graph":"https://pith.science/api/pith-number/YRW3WUPWCMAX6UBOTBS6TRJELZ/graph.json","fetch_events":"https://pith.science/api/pith-number/YRW3WUPWCMAX6UBOTBS6TRJELZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ/action/storage_attestation","attest_author":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ/action/author_attestation","sign_citation":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ/action/citation_signature","submit_replication":"https://pith.science/pith/YRW3WUPWCMAX6UBOTBS6TRJELZ/action/replication_record"}},"created_at":"2026-05-18T02:44:40.762408+00:00","updated_at":"2026-05-18T02:44:40.762408+00:00"}