  An essential design requirement of the ALPS-II experiment is the efficient
detection of single photons with a very low instrumental background of 10
{\mu}Hz. In 2011 the ALPS collaboration started to set up a TES detector
(Transition-Edge Sensor) for ALPS-II, the second phase of the experiment. Since
mid of 2013 the setup is ready for characterization in the ALPS laboratory: an
ADR cryostat (Adiabatic Demagnetization Refrigerator) as millikelvin
environment, a low noise SQUID (Superconducting Quantum Interference Device)
with electronics for read-out and a fiber-coupled high-efficient TES for
near-infrared photons as sensor. First measurements have shown a good
discrimination between noise and 1064 nm signals.
