Method and apparatus for heating current control of a pulsed X-ray tube
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United States of America Patent
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Feb 16, 2016
Grant Date -
Jul 10, 2014
app pub date -
Jan 9, 2014
filing date -
Jan 9, 2013
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Abstract
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.
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