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T: Fachverband Teilchenphysik
T 22: Detektorsysteme 1
T 22.3: Talk
Monday, March 24, 2014, 11:35–11:50, GFH 01-721
Detecting single infrared photons with a W-TES for ALPS-II — •Noëmie Bastidon for the ALPS-II collaboration — Institut für Experimentalphysik, Universität Hamburg
The ALPS-II experiment (Any Light Particle Search II at DESY in Hamburg) will look for light (m<10−4 eV) new fundamental bosons (e.g., axion-like particles, hidden photons and other WISPs) in the next years by the means of a light-shining-through the wall setup. A few years ago, its predecessor had constrained the coupling to photons of axion-like particles (ALPS) to gaγ≤7·10−8GeV−1, m≤10−4eV. Several improvements are foreseen to reach much better sensitivities (gaγ≤7·10−11GeV−1). One of the main modifications which have been done is the substitution of the CCD camera by a W-TES (Transition Edge Sensor with a tungsten chip). This TES, operated at 80 mK, has already allowed single infrared photons detection as well as spectroscopy with very low background rates. In the near future, complete characterization, calibration and optimization (e.g., background suppression) need to be finalized. In this talk, the latest progress in this task will be presented as well as next steps planned for future developments.