{"paper":{"title":"Noise and Thermal Performance of a Sub-Attofarad Capacitance Sensor for Precision Measurements, with Applications in Gravitational Wave Detectors","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["physics.space-ph"],"primary_cat":"physics.ins-det","authors_text":"C.Y. Lui, J. Lipa, S. Buchman, S. Saraf, S. Wang","submitted_at":"2023-06-13T20:36:03Z","abstract_excerpt":"We describe the design principles, fabrication, and characterization of a precision AC resonant capacitance bridge (RCB) sensor, based on a resonant differential planar printed circuit board transformer with a solid (ungapped) MnZn ferrite core, demonstrating a short-term sensitivity at 293 K of 0.225 +/- 0.005 aF/rtHz, at around 120 kHz resonance frequency and 1 Hz Fourier measurement frequency. At 120 K the RCB short term noise sensitivity is 0.118 +/- 0.005 aF/rtHz. We compare the ungapped configuration to five different RCBs; three with a core gap of 65 um and two with a core gap of 130 um"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.08124","kind":"arxiv","version":3},"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/2306.08124/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"}