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X-Ray Quantum Efficiency Of Microchannel Plates
- Source :
- X-Ray Imaging.
- Publication Year :
- 1977
- Publisher :
- SPIE, 1977.
-
Abstract
- The quantum efficiency of microchannel plates has been measured at energies from 0.28 to 3.0 keV and at angles less than 6°. The quantum efficiency reaches a maximum of 27% at 3° and an energy of 0.86 keV. At all energies, the quantum efficiency increases as the angle of incidence decreases until a critical angle is reached, after which the efficiency decreases rapidly. The quantum efficiency, outside of the small angle dip, decreases with energy at a constant angle. The general behaviour of the quantum efficiency can be understood using a very simple physical model. The low angle dip is caused by reflection from the surface of the channel. The variation of the quantum efficiency as a function of energy can be explained by the variation of the X-ray absorption and of the photo- and Auger electron ranges. The data are reasonably reproduced by a simple model.
Details
- ISSN :
- 0277786X
- Database :
- OpenAIRE
- Journal :
- X-Ray Imaging
- Accession number :
- edsair.doi...........1ce2ec291215af86e17ac0927a910eb9
- Full Text :
- https://doi.org/10.1117/12.955471