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![[Figure 10]](he2010fig10mag.jpg)
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Figure 10
Comparison of the diffraction data from trypsin measured with a set of four multiwire chambers (Stuhrmann, 1997  ) with the calculated diffraction pattern of the same trypsin crystal projected onto the cylindrical image plate. The scan width is 1°. The incident X-ray beam emanates from the lower right-hand corner, passes the sample on top of the cone and is caught in a beam stop in front of the inner surface of the cylinder. The increased scattering intensity near the beam stop, which has been measured by one of the detectors, is clearly visible. The picture of the neighbouring detector is shown in Fig. 4. The four area detectors (one of them is hidden) accept the following intervals of scattering angles (−50°, −18°), (−5°, 27), (40°, 72°), (85°, 117°). Diffraction peaks from trypsin have been observed in the full range of accessible scattering angles. The four area detectors cover a solid angle of one-tenth of a unit sphere. If a bent image plate had been used, a simultaneous measurement over two-thirds of the unit sphere would have been possible. In the absence of a cylindrical on-line image-plate scanner, a flat on-line image-plate scanner would still be a good compromise. |
![[Figure 10]](he2010fig10.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
