{"paper":{"title":"A laser heterodyne polarimeter for birefringence measurement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.ins-det","authors_text":"D. B. Tanner, Gabriel Alberts, Guido Mueller, Harold Hollis","submitted_at":"2017-10-10T19:56:31Z","abstract_excerpt":"We introduce a laser heterodyne polarimeter designed for the precision measurement of sub $\\mu\\mathrm{rad}$ differential phase shifts due to birefringence. The polarimeter will be used in an initial testbed for a potential future vacuum magnetic birefringence experiment at DESY. This experiment would use the 212-m-long ALPS magnet string. The vacuum magnetic birefringence signal will be amplified inside a high finesse optical cavity before it is sensed. This paper describes the polarimeter, initial results, and systematic error sources which still have to be minimized before the vacuum birefri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.03801","kind":"arxiv","version":2},"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"}