Method and Apparatus for Heating Current Control of a Pulsed X-Ray Tube

摘要

A method and an associated apparatus for controlling a heating current flowing through an emitter of a pulsed X-ray tube during pulse pauses are provided. The heating current is controlled by comparing a measured actual value of the heating current with a predefinable desired value of the heating current. A low-pass filtering of the actual value of the heating current is effected before the comparison. A time constant of the low-pass filtering is equal to a thermal time constant of the emitter. A correction of the actual value of the heating current is provided before the low-pass filtering by a first correction value. The first correction value is determined such that a tube current control during the pulses is not compensated for by the heating current control in the pulse pauses.

主权项

1. A method for controlling a heating current flowing through an emitter of a pulsed X-ray tube during pulse pauses, the method comprising:
comparing a measured actual value of the heating current with a predefinable desired value of the heating current; low-pass filtering the measured actual value of the heating current before the comparison, wherein a time constant of the low-pass filtering is equal to a thermal time constant of the emitter; and correcting the measured actual value of the heating current before the low-pass filtering by a first correction value, wherein the first correction value is determined such that a tube current control during the pulses is not compensated for by the heating current control in the pulse pauses.