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Figure 1
Schematic of the structure and field profile of several types of APDs. See text, §§2[link] and 5[link]. The orientations are chosen so that, under bias, free electrons will move from left to right. Hatched sections of the field profile indicate the gain region. [After Webb et al. (1974BB51) and McIntyre et al. (1996BB37).] According to the usual diode convention, the left side is the anode and the right side is the cathode, with the X-rays shown entering through the anode. Reverse biasing (shown) is achieved by applying, say, positive HV to the cathode (right side) and holding the anode (left side) at ground.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 13| Part 2| March 2006| Pages 131-142
https://doi.org/10.1107/S090904950503431X
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