Wide dynamic range germanium detector for perturbation crystallography

An IR detector based on a cooled germanium photodetector has been tested for applications in X-ray diffraction. The detector can be used simultaneously in photon-counting mode and current mode giving a dynamic range from < 1 to 10(9) photons s(-1). Since germanium is used as the photodetector, it...

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Veröffentlicht in:Journal of synchrotron radiation. - 1994. - 3(1996), Pt 4 vom: 01. Juli, Seite 156-9
1. Verfasser: Graafsma, H (VerfasserIn)
Weitere Verfasser: Thorander, P, Heunen, G W, Morse, J
Format: Aufsatz
Sprache:English
Veröffentlicht: 1996
Zugriff auf das übergeordnete Werk:Journal of synchrotron radiation
Schlagworte:Journal Article
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245 1 0 |a Wide dynamic range germanium detector for perturbation crystallography 
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520 |a An IR detector based on a cooled germanium photodetector has been tested for applications in X-ray diffraction. The detector can be used simultaneously in photon-counting mode and current mode giving a dynamic range from < 1 to 10(9) photons s(-1). Since germanium is used as the photodetector, its efficiency at energies above 25 keV is much better than the silicon equivalents. The detector proved to be highly linear both in the low-flux region (< 10(5) photons s(-1)) where photon counting is used and in the high-flux region (> 10(5) photons s(-1)) where the detector is run in current mode. The response time of the detector is of the order of 1 mus, making it suitable for studies in perturbation crystallography, especially when coupled to a lock-in amplifier. As an example, the shift of a reflection of LiNbO(3) induced by an external electric field was determined with the germanium detector and lock-in amplifier 
650 4 |a Journal Article 
700 1 |a Thorander, P  |e verfasserin  |4 aut 
700 1 |a Heunen, G W  |e verfasserin  |4 aut 
700 1 |a Morse, J  |e verfasserin  |4 aut 
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