Patent Number: 
Section: abstract

An x-ray apparatus (1), has an electron beam source (2), a target (4), onto which the electron beam (3) is directed to form a focal spot (5; 5a, 5b) on the target (4), x-ray optics (6) for collecting x-rays emitted from the focal spot (5; 5a, 5b) to form an x-ray beam (8) and a sample position (9) at which the x-ray beam (8) is directed. The x-ray apparatus (1) further includes an electrostatic or electromagnetic electron beam deflection device (10) suitable for moving the focal spot (5; 5a, 5b) on the target (4). The extension of the focal spot (5; 5a, 5b) in any direction (x, y, z) is at least a factor of 1.5 smaller than the extension of the target (4). An x-ray apparatus is thereby provided with simplified alignment of the x-ray optics with respect to a microfocus x-ray source.