| 摘要 |
The invention relates to the optimisation of the emission of an X-ray tube by setting the distance between the anode and the cathode. In the case of X-ray tubes which are normal at the moment, there is a predetermined fixed distance between the cathode and anode, which results in the emission being inadequate at low voltage even though it is good at high voltage. For optimisation, the invention provides for a change in the distance, taking into account the maximum possible load below the breakdown field intensity, i.e. the distance is reduced as the voltage decreases and is increased with increasing voltage. An optimisation according to the invention is particularly suitable for use in the case of X-ray tubes for medical diagnosis. <IMAGE>
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