X-ray Sources and Detectors
In Chapter 1 you learned how crystals of a protein can be grown and you observed a diffraction pattern. The crystalline form of a protein is required to determine the protein’s structure by X-ray diffraction, but equally necessary are the tools for recording the diffraction pattern. These will be described in this chapter on hardware. The various X-ray sources and their special properties are discussed, followed by a description of cameras and detectors for quantitative and qualitative X-ray data collection.
KeywordsSynchrotron Radiation Area Detector Reciprocal Lattice Image Plate Diffract Beam
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- 1.Wilhelm Conrad Roentgen, 1845–1925, discovered X-rays on November 8, 1895 in Würzburg, Germany.Google Scholar
- 2.Max von Laue, 1879–1960, German physicist, developed the theory of X-ray diffraction by a three-dimensional lattice.Google Scholar
- 3.Brilliance is defined as number of photons/sec/mrad2/mm2/0.1% relative bandwidth.Google Scholar
- 4.Background scattering is mainly caused by the air through which the X-ray beam passes from the collimator to the beamstop. If the airpath is long and absorption serious, it can appreciably be reduced if a cone filled with helium is put between the crystal and the plate.Google Scholar
- 6.This instrument is discussed in detail in Arndt and Wonacott (1977).Google Scholar
- 7.A full circle is 2π radians.Google Scholar