Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 38: Search for New Particles 3
T 38.3: Vortrag
Dienstag, 22. März 2022, 16:45–17:00, T-H23
Status and Prospects of a TES-based Detector System for ALPS II — Gulden Othman and •Katharina-Sophie Isleif for the ALPS collaboration — University of Hamburg, Hamburg, Germany
The Any Light Particle Search II (ALPS II) experiment will search for QCD axions and axion-like particles (ALPs) in an important parameter space that is relevant in understanding anomalous astrophysical phenomena, including stellar evolution and dark matter. ALPS II takes advantage of the axion coupling to photons using a Light-Shining-through-a-Wall technique. Photons created using a strong laser may convert into ALPs in the presence of a strong magnetic field. The ALPs can traverse a light-tight barrier, reconvert into photons within a second magnet string, and be subsequently detected. The rate of re-converted photons is extremely low, on the order of 10−5 counts/second, and their observation requires the use of sensitive photon detectors with high efficiency and low backgrounds. The first stage of ALPS II, currently under construction at DESY, Hamburg, will use a heterodyne detection method. In the subsequent phase, ALPS II can utilize advances in cryogenic quantum sensing by employing Transition Edge Sensors (TESs). We are currently developing a TES-based detector system that can meet the requirements for ALPS II, offering single-photon detection with high efficiency and low-backgrounds at the 1064 nm (1.165 eV) energy of interest. In this talk, we present the feasibility, challenges, and current status of the TES-based detector system for ALPS II at DESY, Hamburg.