Design and performance of the ALPS II regeneration cavity
The regeneration cavity (RC) is a critical component of the Any Light Particle Search II (ALPS II) experiment. It increases the signal from possible axions and axion-like particles in the experiment by nearly four orders of magnitude. The total round-trip optical losses of the power circulating in the cavity must be minimized in order to maximize the resonant enhancement of the cavity, which is an important figure of merit for ALPS II. Lower optical losses also increase the cavity storage time, and with the 123 meter long ALPS II RC we have demonstrated the longest storage time of a two-mirror optical cavity. We measured a storage time of 7.17±0.01<i>m</i><i>s</i>, equivalent to a linewidth of 44.4 Hz and a finesse of 27,500 at a wavelength of 1064 nm.
Authors
- T. Kozłowski (ORCID: https://orcid.org/0000-0003-4790-4296)
- A. Lindner (ORCID: https://orcid.org/0000-0001-6006-0820)
- L.‐W. Wei (ORCID: https://orcid.org/0000-0001-8210-2024)
- Aaron Spector (ORCID: https://orcid.org/0000-0002-6575-8192)
- Kanioar Karan
- A. Ejlli (ORCID: https://orcid.org/0000-0002-4149-4532)
- Harold Hollis (ORCID: https://orcid.org/0000-0001-5176-8341)
- B. Willke (ORCID: https://orcid.org/0000-0003-0524-2925)
- Dominique Tanner (ORCID: https://orcid.org/0000-0001-5080-4697)
- H. Grote (ORCID: https://orcid.org/0000-0002-0797-3943)
- Ayman Hallal (ORCID: https://orcid.org/0000-0002-9301-000X)
- Daniel C. Brotherton
- Henry Fraedrich
- Isabella Oceano
- Guido Müller
Institutions
- Leibniz University Hannover (DE)
- University of Florida (US)
- Max Planck Institute for Gravitational Physics (DE)
- Cardiff University (GB)
Publication Details
- Journal
- Optics Express
- Published
- 2025-02-26
- DOI
- https://doi.org/10.1364/oe.540297
- Citations
- 1
- Primary Topic
- Particle accelerators and beam dynamics
- Type
- article
- Field-Weighted Citation Impact
- 4.99
Funders
- Science and Technology Facilities Council