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Testing the Linearity of Response of Gated Photomultipliers in Wide Dynamic Range Laser Radar Systems

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2 Author(s)
Hunt, W.H. ; Wyle Laboratories Hampton, Virginia 23665 ; Poultney, S.K.

Laser radar data acquisition systems have been utilized in conjunction with a light emitting diode to evaluate photomultipliers for laser radar use. Light pulses with an exponential decay rate of approximately one decade per sixty microseconds, as well as other pulse shapes, were used to drive the tubes. Properties studied in the analog mode include nonlinearity at high output currents, transient behavior upon gating, gate holdoff, dynamic range limitations because of light-induced noise, and the effect of dynode gating on tubes without a focus grid. Some of these properties were also studied in the photon counting mode, along with single photoelectron pulse shape and afterpulsing. Tubes studied were the RCA 7265, the RCA 8852, and the RCA C1034. A brief description of the laser radar technique of atmospheric measurements is included.

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Nuclear Science, IEEE Transactions on  (Volume:22 ,  Issue: 1 )