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Published November 1, 1979 | public
Journal Article Open

Linear position-sensitive x-ray detector incorporating a self-scanning photodiode array


A linear position-sensitive x-ray detector for x-ray spectroscopy and diffraction applications has been tested which can provide excellent spatial resolution, wide dynamic range and good sensitivity. The heart of the system is a self-scanning, photosensitive silicon diode array. It is interfaced via fiber optics to a thin layer of ZnS which fluoresces visible light upon absorption of x-radiation. The conversion to visible light and optical coupling provide several-fold gain in the efficiency of detection as compared to the direct detection of x-ray by the diode array. Equally important is that the array is protected from irreversible damage by high energy radiation, a limitation which previously hindered this application of silicon diode technology.

Additional Information

Copyright © 1979 American Institute of Physics Received 30 March 1979; accepted for publication 2 August 1979 This work was supported by NSF grant CHE75-15146A4. The position-sensitive detector was constructed under grants from NASA and the California Institute of Technology's President's Fund. We thank H. Moham for his careful machine work and R. Iirigoyan for the electronics design. This is Contribution No. 5995 from the Arthur Amos Noyes Laboratory of Chemical Physics. Some of the data presented in this work were obtained at the Stanford Synchrotron Radiation Laboratory which is supported by the NSF (under Contract DMR77-27489), in cooperation with SLAC and the Department of Energy.


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