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T: Fachverband Teilchenphysik

T 28: Search for new particles 3 (ALPS)

T 28.4: Vortrag

Dienstag, 5. März 2024, 16:45–17:00, Geb. 20.30: 1.067

ALPS II Overview and Data Taking — •Henry Frädrich for the ALPS collaboration — Deutsches Elektronen-Synchrotron (DESY)

The Any Light Particle Search II (ALPS II) is an ongoing 'light-shining-through-a-wall' experiment located at DESY in Hamburg. ALPS II will look for axions and axion like particles, which are hypothetical particles outside the standard model, motivated by exciting hints. The existence of axions would solve the strong CP-problem and could also be an explanation for multiple cosmic phenomena including dark matter, TeV transparency as well as the excess cooling of horizontal branch stars. The ALPS II experiment uses the axion's property of coupling to photons in the presence of magnetic fields, to measure light that has undergone axion-photon conversion and subsequent photon-axion conversion. On the experimental site we use the magnetic fields of 24 superconducting HERA magnets and two state of the art optical cavities with a length of 122 m each, to probe the axion parameter space in new regions. The experiment has been running since May 2023 with multiple successful science runs. In this talk I will give a general overview of the ALPS II experiment and discuss recently acquired data from the first science campaign.

Keywords: Axion; ALPS; DESY; dark matter; optics