  Ground-based gamma-ray astronomy in the Very High Energy (VHE, E>100 GeV)
regime has fast become one of the most interesting and productive sub-fields of
astrophysics today. Utilizing the Imaging Atmospheric Cherenkov Technique
(IACT) to reconstruct the energy and direction of incoming gamma-ray photons
from the universe, several source-classes have been revealed by previous and
current generations of IACT telescopes (e.g. Whipple, MAGIC, HESS and VERITAS).
The next generation pointing IACT experiment, the Cherenkov Telescope Array
(CTA), will provide increased sensitivity across a wider energy range and with
better angular resolution. With the development of CTA, the future of IACT
pointing arrays is being directed towards having more and more telescopes (and
hence cameras), and therefore the need to develop low-cost pixels with
acceptable light-collection efficiency is clear. One of the primary paths to
the above goal is to replace Photomultiplier Tubes (PMTs) with Silicon-PMs
(SiPMs) as the pixels in IACT telescope cameras. However SiPMs are not yet
mature enough to replace PMTs for several reasons: sensitivity to unwanted
longer wavelengths while lacking sensitivity at short wavelengths, small
physical area, high cost, optical cross-talk and dark rates. Here we propose a
novel method to build relatively low-cost SiPM-based pixels utilising a disk of
wavelength-shifting material, which overcomes some of these drawbacks by
collecting light over a larger area than standard SiPMs and improving
sensitivity to shorter wavelengths while reducing background. We aim to
optimise the design of such pixels, integrating them into an actual 7-pixel
cluster which will be inserted into a MAGIC camera and tested during real
observations. Results of simulations, laboratory measurements and the current
status of the cluster design and development will be presented.
