X-ray source, computer tomography and methods of operation of the X-ray source and the computer tomograph

X-ray source comprising a laser (12) and a plurality of X-ray emitters (8) situated, each having a electron source (32) and a in an anode (22) X-ray emission center (34), wherein each of the X-ray emitter (8) is assigned an optical path, along its aussendbarer a from the laser (12) beam (36) from said laser (12) to the electron source (32) of the X-ray emitter (8) is guided, and wherein during operation of the X-ray source using this laser beam (36) from the electron source (32) of outgoing electron beam (30) generated and for generating one of the associated x-ray emitter (8) outgoing x-ray beam (20) in the X-ray emission center (34) of the X-ray emitter (8) is accelerated at which assigned the x-ray emitters (8) branching optical paths in a multi-beam coupler (14) and - seen in beam direction - for this multi-beam coupler (14) for each of the X-ray emitter (8 ) Of the laser beam (36) is guided on at least one part of the length of the corresponding optical path in a separate optical fiber, wherein the multiple beam coupler (14) comprises an electro-optic, acousto-optic and / or a mechanical deflector (with the aid of the laser beam 36) for sequentially seriatim coupling into the respective optical fiber (10) is deflectable.