A 489-hour run of a tungsten transition-edge sensor, used as both target and readout, sets first-generation limits on sub-MeV dark matter scattering with electrons and nucleons and on dark photon absorption.
TES Detector for ALPS II
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abstract
The application of cryogenic single photon detectors has found great use in high precision particle physics experiments such as ALPS (Any Light Particle Search) II, which implements it for fundamental studies to search for new particles. ALPS II is a light-shining-through-a-wall experiment searching for axion-like-particles, which couple to photons. The extremely low rate of photons generated by the conversion of such axion-like-particles necessitates a detector setup capable of low energy (~ 1 eV; as dictated by cavity optics) single photon detection with high efficiency and an ultra-low background level, with long-term stability. This can be realised by a Transition Edge Sensor (TES) setup with low-temperature SQUID readout.
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First direct search for light dark matter interactions in a transition-edge sensor
A 489-hour run of a tungsten transition-edge sensor, used as both target and readout, sets first-generation limits on sub-MeV dark matter scattering with electrons and nucleons and on dark photon absorption.