A “LEGO” Hybrid Photon Detector – assembled from standard mass-produced vacuum components

Motivated primarily by the MAGIC atmospheric Cherenkov telescope project, we have developed a “LEGO” Hybrid Photon Detector (HPD) comprising excellent focusing properties and protection against positive ion feedback. LEGO-HPD is supposed to be assembled from standard high vacuum components, which insures simplicity in the assembly procedure and reliability of operation.