SIO Reference 59-11. This paper suggests a method for fitting the secondary emission characteristic of multiplier phototubes to a general equation for secondary emission from metalic surfaces. An analysis of this equation affords an explanation of the observed fact that multiplier phototube gain is proportional to the n-th power of the dynode supply voltage over a limited range.The technique followed was to develop an approximate form of the theoretical secondary emission characteristic, and then to correlate this analysis with an experimental determination of this characteristic for a specific 931-A multiplier phototube*/

SIO Reference 60-45. The function of a photoelectric system should be to improve upon the performance capabilities of unaided visual search. This report will therefore start with a very brief analysis of the visual detection capability. Succeeding sections of the report will discuss each parameter of the search geometry and indicate, where possible, modification of the parameter which will lead to improved performance. The final sections will describe a photoelectric system capable of incorporating the improvements indicated in the paragraphs which precede it and capable of day and night operation at a performance level surpassing the specified Navy requirements.