  In the present work, we describe a cryogenic setup for studies of
wavelength-shifting materials for optimised light collection in noble element
radiation detectors, and discuss the commissioning results. This SiPM-based
setup uses alpha induced scintillation in gaseous argon as the vacuum
ultraviolet light source with the goal of characterising materials, such as
polyethylene naphthalate (PEN) and tetraphenyl butadiene (TPB), in terms of
their wavelength-shifting efficiency. Further extensions of the system are
currently being studied. The foreseen upgrades are expected to allow the study
of GEM-like structures potentially interesting for rare-event searches. The
design of the setup will be addressed along with the first results.
