Single Photoelectron Recording by an Image Intensifier TV Camera System.

A combination of a four-stage cascaded image intensifier and a plumbicon television camera system was used to record photoelectrons from faint images. The lens coupled system needs image intensifier gains of the order of 10(6) to overcome TV camera noise by single photoelectron scintillations. The properties of the system were evaluated with special emphasis on recording efficiency. The recorded pulse height distribution was analyzed, and it was shown that inefficiencies in the TV sampling process produce an exponential pulse height distribution.