SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 117: Dark Matter I

T 117.5: Vortrag

Donnerstag, 23. März 2023, 16:50–17:05, HSZ/0003

Heterodyne detection of weak fields in ALPS II — •Isabella Oceano for the ALPS collaboration — Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

The Any Light Particle Search II (ALPS II) is a Light Shining through a Wall experiment at DESY in Hamburg, which will hunt for axions and axion-like particles in the sub-meV mass range with an axion-photon-photon coupling g_{α γ γ} > 2 × 10⁻¹¹ GeV⁻¹. To do this, a high-power laser will be directed through a strong magnetic field where some of the photons can convert into a beam of axion-like particles. After this, the beam will cross a light-tight barrier and another strong magnetic field where some of the axion-like particles can convert back into photons and be detected. During the first data acquisition, planned for early 2023, a HETerodyne (HET) interferometer will be used to detect the reconverted photons. This very sensitive interferometer can detect very weak signals at the exact signal frequency.

The HET principle and its implementation in ALPS II will be discussed in this talk.