An Electrostatic Focusing System and its Application to a Fine Focus X-Ray Tube

作者：Wolfgang W. Ehrenberg, Walter Eric Spear · 发表于：Proceedings of the Physical Society Section B · 年份：1951 · DOI：10.1088/0370-1301/64/1/307 · 被引用次数：72 · 研究领域：Crystallography and Radiation Phenomena、Particle Accelerators and Free-Electron Lasers、Advanced X-ray Imaging Techniques

The description is given of an electrostatic focusing system by which electrons emitted from the tip of a hairpin filament are reunited at a distance of 2 to 3 cm. No intermediate potentials are required. An X-ray method is used for the experimental investigation of its properties. The electron spot is a reduced image of the tip of the filament and has a diameter of about 40 μ. On the basis of this system, a fine focus X-ray tube is designed, with a peak specific target loading of about 11 kw/mm 2 . Some performance data are given.