A Hybrid Cockroft Walton Multi-Dynode Photomultiplier Supply for Space Applications

A system of generating and controlling high voltage D. C. potentials for use with photomultiplier tubes is described. Emphasis is placed on simplicity of electrical and mechanical design through the use of modern miniature components and thick film technology. The photomultiplier power converter was designed to supply the potentials required by the P. M. tube in a particle spectrometer for high counting rates.(1) The high voltage is programmable over a limited range (100V) for automatic experiment calibration adjustment.(2) The prime parameters to be considered in the design were: voltage stability, high load current capability, low ripple, programmable, multi outputs for the dynodes, low power consumption, small size and weight, and direct package interface with a round P. M. tube housing.