A Sensitive Electronic Photometer Employing Negative Feedback

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Pack, John Lee
Astrophysics and Astronomy; Physics
thesis / dissertation description
Purpose of the InstrumentThe instrument to be described in these pages was tentatively intended to be used for the purpose of scanning the night sky automatically for investigations of the zodiacal light. It was to detect light below the noise level of a photomultiplier tube, to have linearity up to signals 100 times greater than the noise level, and to have a response time of about 10-4 seconds.