Page
11
© 1990-2002 J.Paul Robinson, Purdue University
BMS 631 – LECTURE007.PPT
Avalanche Photodiodes (APD’s)
•
Combines the best features of PMTs and photodiodes
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High quantum efficiency, good gain
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Gain is 10
2
-10
3
(much less than PMTs)
•
Problem with high dark current
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Image From: http://micro.magnet.fsu.edu/primer/java/photomicrography/avalanche/