International
Tables for
Crystallography
Volume F
Crystallography of biological macromolecules
Edited by M. G. Rossmann and E. Arnold

International Tables for Crystallography (2006). Vol. F. ch. 6.1, p. 125   | 1 | 2 |

Figure 6.1.2.1 

U. W. Arndta

a Laboratory of Molecular Biology, Medical Research Council, Hills Road, Cambridge CB2 2QH, England

[Figure 6.1.2.1]
Figure 6.1.2.1

Section through a sealed X-ray tube. G, glass envelope; F, filament leads (at negative high voltage); C, focusing cup; T, target (at ground potential); W, one of four beryllium windows. The electron beam forms a line on the target, which is viewed at a small take-off angle to form a foreshortened effective source X.