SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 27: Searches II
T 27.5: Vortrag
Dienstag, 21. März 2023, 18:00–18:15, HSZ/0403
A TES for ALPS II - Status and Prospects — •José Alejandro Rubiera Gimeno for the ALPS collaboration — Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
The Any Light Particle Search II (ALPS II) is a Light-Shining-through-a-Wall experiment operating at DESY, Hamburg. Its goal is to probe the existence of Axions and Axion Like Particles (ALPs), possible candidates for dark matter. In the ALPS II region of interest, a rate of photons reconverting from Axions/ALPs on the order of 10−5 cps is expected. This requires a sensor capable of measuring low-energy photons (1.165 eV) with high efficiency and a low dark count rate. We investigate a tungsten Transition Edge Sensor (TES) system as a photon-counting detector that promises to meet these requirements and is foreseen for a later science run of ALPS II. This detector exploits the drastic change in its resistance caused by the absorption of a single photon when operated in its superconducting transition region at millikelvin temperatures. In order to achieve the required sensitivity, the implementation of the TES into the ALPS II experiment needs to be carefully optimized. In this work, we present the progress on measurements for the characterization of dark noise, energy resolution, background rejection, efficiency and linearity of our sensor.