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Comparison of different methods for determining the size of a focal spot of microfocus X-ray tubes

: Salamon, M.; Hanke, R.; Sukowski, F.; Uhlmann, N.; Voland, V.


Michel, T.:
Radiation imaging detectors 2007. Proceedings of the 9th International Workshop on Radiation Imaging Detectors : Erlangen, Germany, July 22 - 26, 2007 ; 9th iWORID
Amsterdam: Elsevier, 2008 (Nuclear instruments and methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment 591.2008, Nr.1)
International Workshop on Radiation Imaging Detectors (IWORID) <9, 2007, Erlangen>
Conference Paper, Journal Article
Fraunhofer IIS ()

The EN 12543-5 describes a method for determining the focal spot size of microfocus X-ray tubes up to a minimum spot size of 5 mm. The wide application of X-ray tubes with even smaller focal spot sizes in computed tomography and radioscopy applications requires the evaluation of existing methods for focal spot sizes below 5 mm. In addition, new methods and conditions for determining submicron focal spot sizes have to be developed. For the evaluation and extension of the present methods to smaller focal spot sizes, different procedures in comparison with the existing EN 12543-5 were analyzed and applied, and the results are presented.