Motivated primarily by the MAGIC atmospheric Cherenkov telescope project, w
e 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 in
sures simplicity in the assembly procedure and reliability of operation. (C
) 2000 Elsevier Science B.V. All rights reserved.