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Gated photomultiplier response characterization for DIAL measurementsThe characteristics of various detector responses are studied to understand the cause of various systematic biases and to minimize these undesirable effects in measurements of transient signals with large dynamic range. Signal-induced bias, gain variation, and the linearity of commonly used gated photomultipliers in the current integrating mode are quantitatively evaluated. Analysis of the results indicates that impurity ions inside the photomultiplier tubes (PMT) are the source of the signal induced bias and gain variation. Two different PMTs used in this study show significant differences in the magnitude and decay behavior of signal-induced bias. It was found that it can be minimized by using an external amplifier to reduce PMT gain, and by applying a low potential between the cathode and first dynode. The linearity of a PMT is also studied over a large dynamic range of input intensities employing a new technique which does not require an absolute calibration. The result of this study shows that the photomultiplier response is linear only for a limited input intensity range below a certain anode current.
Document ID
19900057447
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lee, H. Sang
(SM Systems and Research Corp. Landover, MD, United States)
Schwemmer, Geary K.
(SM Systems and Research Corp. Landover, MD, United States)
Korb, C. Laurence
(SM Systems and Research Corp. Landover, MD, United States)
Dombrowski, Mark
(SM Systems and Research Corp. Landover, MD, United States)
Prasad, Coorg
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1990
Publication Information
Publication: Applied Optics
Volume: 29
ISSN: 0003-6935
Subject Category
Electronics And Electrical Engineering
Accession Number
90A44502
Distribution Limits
Public
Copyright
Other

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