Direct x-ray response of self-scanning photodiode arrays

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Self-scanning photodiode arrays were tested for their ability to measure the spatial distribution of low-energy x rays in a wavelength-dispersive spectrometer. X-ray spectral sensitivity was measured with a calibrated dc source of nearly-monochromatic characteristic-x rays with photon energies in the range of 1.5 to 8 keV. Photodiode response was found to be linear with x-ray flux. Exposure to large doses of copper radiation did not affect sensitivity. A mathematical model that describes the experimental data is presented. It was found that spatial resolving power was lowered by the dispersal of photogenerated charges. This effect was investigated with collimated beams and ... continued below

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Pages: 12

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Koppel, L. N. August 13, 1975.

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Description

Self-scanning photodiode arrays were tested for their ability to measure the spatial distribution of low-energy x rays in a wavelength-dispersive spectrometer. X-ray spectral sensitivity was measured with a calibrated dc source of nearly-monochromatic characteristic-x rays with photon energies in the range of 1.5 to 8 keV. Photodiode response was found to be linear with x-ray flux. Exposure to large doses of copper radiation did not affect sensitivity. A mathematical model that describes the experimental data is presented. It was found that spatial resolving power was lowered by the dispersal of photogenerated charges. This effect was investigated with collimated beams and is described with a formula that predicts the loss of diode signals. (auth)

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Pages: 12

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Dep. NTIS

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  • 24. annual conference on applications of x-ray analysis, Denver, Colorado, USA, 6 Aug 1975

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  • Report No.: UCRL--76869
  • Report No.: CONF-750831--3
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4143889
  • Archival Resource Key: ark:/67531/metadc864427

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  • August 13, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 18, 2016, 1:51 p.m.

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Koppel, L. N. Direct x-ray response of self-scanning photodiode arrays, article, August 13, 1975; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc864427/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.