| 摘要 |
The invention relates to betatron (1), especially in X-ray testing appara tus, comprising a rotationally symmetrical inner yoke consisting of two inte rspaced parts (2a, 2b), at least one round plate (3a-3d) which is arranged b etween the inner yoke parts (2a, 2b) in such a way that the longitudinal axi s thereof coincides with the rotational symmetrical axis of the inner yoke, an outer yoke (4) connecting the two inner yoke parts (2a, 2b), at least one main field coil (6a, 6b), a toroidal betatron tube arranged between the inn er yoke parts (2a, 2b), at least one tune coil (7a-7c) in the region of the at least one round plate (3a-3d), and an electronic control system (8) for c ontrolling a current flow through the tune coil (7a-7c) during the injection phase of the electrons into the betatron tube (5).
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