Measuring the linearity of X-ray detectors: consequences for absolute attenuation, scattering and absolute Bragg intensities Academic Article uri icon

abstract

  • The linearity of response of X-ray detectors is tested. Examples of linearity tests demonstrate the remarkable range of linear response of flowing-gas ion chambers in the synchrotron environment. The diagnostic is also highly sensitive to the presence in the X-ray beam of harmonic X-rays diffracted by a higher-order reflection of the monochromator. The remarkable range of linearity of ion chambers has enabled the accurate measurement of the absolute X-ray attenuation of a number of elements. It should now be possible to measure the absolute intensity of Bragg reflections, provided such measurements are carried out with extended-face single crystals. The advantages of the extended-face crystal technique for Bragg intensity measurements are summarized and a number of approaches to absolute Bragg intensity measurement are discussed.

authors

  • Barnea, Zwi
  • Chantler, Christopher T
  • Glover, Jack L
  • Grigg, Mark W
  • Islam, M Tauhidul
  • de Jonge, Martin D
  • Rae, Nicholas A
  • Tran, Chanh Q

publication date

  • April 1, 2011