2020/10/01 by Ayman Hallal, Hallal, Ayman, Giuseppe Messineo +13 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics) #hep-ex #physics.ins-det #physics.optics
paper · pdf · doi:10.48550/arxiv.2010.02334
12 pages, 5 figures
arxiv created 2021/02/07 · arxiv updated 2021/02/09
ALPS II, the Any Light Particle Search, is a second-generation Light Shining through a Wall experiment that hunts for axion-like particles. The experiment is currently transitioning from the design and construction phase to the commissioning phase, with science runs expected to start in 2021. ALPS II plans to use two different sensing schemes to confirm the potential detection of axion-like particles or to verify an upper limit on their coupling strength to two photons of gaγγ≤2×10-11GeV-1. This paper discusses a heterodyne sensing scheme (HET) which will be the first scheme deployed to detect the regenerated light. It presents critical details of the optical layout, the length and alignment sensing scheme, design features to minimize spurious signals from stray light, as well as several control and veto channels specific to HET which are needed to commission and operate the instrument and to calibrate the detector sensitivity.