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Optics for Engineers
book

Optics for Engineers

by Charles A. DiMarzio
August 2011
Intermediate to advanced content levelIntermediate to advanced
564 pages
20h 45m
English
CRC Press
Content preview from Optics for Engineers
426 OPTICS FOR ENGINEERS
but not always, this dynode chain consists of resistors with identical values. If the currents
arising from electron ow in the PMT, shown as current sources in the gure, are small, then the
voltages between adjacent diodes will all be the same. To maintain this condition, the resistors
must be small enough so that the resistor current exceeds the current in the photomultiplier.
The smaller resistors, however, result in greater power dissipation in each stage, V
2
mn
/R
mn
, and
this power is all dissipated as heat. Alternative bias circuits including active ones that provide
more constant voltage with lower power consumption
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Publisher Resources

ISBN: 9781439807255