Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 38: Search for New Particles 3
T 38.4: Vortrag
Dienstag, 22. März 2022, 17:00–17:15, T-H23
Analysis and simulation of TES data in the ALPS II experiment — •José Alejandro Rubiera Gimeno for the ALPS collaboration — Deutsches Elektronen-Synchrotron, Hamburg, Germany
The Any Light Particle Search II (ALPS II) is a Light-Shining-through-a-Wall experiment under construction at DESY, Hamburg. Its goal is to probe the existence of Axion Like Particles (ALPs), a possible candidate for dark matter. In the ALPS II region of study, a rate of photons reconverting from 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. 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 this work, the analysis procedure applied to measured TES pulses, in time and frequency domain, is presented. This analysis allows extracting characteristic parameters used for signal discrimination against backgrounds. The energy resolution computed from data is compared to simulations of electronic noise superimposed with ideal photon pulses.