Media type: Text; E-Article Title: Optics mounting and alignment for the central optical bench of the dual cavity enhanced light-shining-through-a-wall experiment ALPS II Contributor: Wei, Li-Wei [Author]; Karan, Kanioar [Author]; Willke, Benno [Author] Published: Washington, DC : Optical Society of America (OSA), 2020 Published in: Applied Optics 59 (2020), Nr. 28 Issue: published Version Language: English DOI: https://doi.org/10.15488/10612; https://doi.org/10.1364/AO.401346 ISSN: 0003-6935; 1540-8981; 1559-128X Keywords: axion–photon ; Nambu–Goldstone boson ; ALPS II ; particle physics ; hypothetical particle Origination: Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen. Description: Any Light Particle Search II (ALPS II) is a light-shining-through-a-wall experiment seeking axion-like particles. ALPS II will feature two 120 m long linear optical cavities that are separated by a wall and support the same photon mode. The central optical bench at the core of the experiment will be equipped with a light-tight shutter and two planar mirrors for the cavities. We show that the mounting concept for ALPS II provides sufficient angular stability and verify that a simple autocollimator assisted alignment procedure for crucial components of the ALPS II optical cavities can lead to the required overlap of the cavity eigenmodes. Furthermore, we show that mounted quadrant photodiodes added to the optical bench can have sufficient stability to maintain this overlap even without a clear line of sight between the two optical cavities. © 2020 Optical Society of America Access State: Open Access