{"paper":{"title":"Cryogenic sub-Hz cROss torsion bar detector with quantum NOn-demolition Speed meter (CHRONOS) for gravitational wave detection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.IM","gr-qc"],"primary_cat":"physics.ins-det","authors_text":"Daiki Tanabe, M.Afif Ismail, Mario Juvenal S Onglao III, Ta-Chun Yu, Vivek Kumar, Yuki Inoue","submitted_at":"2025-10-25T15:49:08Z","abstract_excerpt":"We present the optical design and sensitivity modeling of the 2.5\\,m Cryogenic sub-Hz cROss torsion-bar detector with quantum NOn-demolition Speed meter (CHRONOS), a triangular Sagnac speed-meter interferometer with power and signal recycling. Using ABCD-matrix analysis and \\textsc{Finesse3} simulations, we optimize the optical configuration and achieve mode-matching efficiencies above 99.5\\%. The optimized design reaches a quantum-noise-limited strain sensitivity of \\[ h \\simeq 3\\times10^{-18}\\,\\mathrm{Hz^{-1/2}} \\] at 1\\,Hz with a ring-cavity finesse of \\[ \\mathcal{F}\\simeq3.1\\times10^{4}. \\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.24780","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/2510.24780/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"}