new mesofocus ndt x-ray tube conceptnew mesofocus ndt x-ray tube concept adrian riedo 1 1 comet ag,...
TRANSCRIPT
International Symposium on
Digital Industrial Radiology and Computed Tomography – DIR2019
1 License: https://creativecommons.org/licenses/by-nd/4.0/
New MesoFocus NDT X-Ray tube concept
Adrian RIEDO 1
1 COMET AG, Flamatt, Switzerland
Contact e-mail: [email protected]
Abstract
A new tube concept with a variable, small focal spot is presented. The term MesoFocus
means that the BF size ranges between the conventional MiniFocus and the open
MicroFocus tubes.
The following features are achieved with a novel triode focusing concept:
- Adjustable focal spot size from 50 to 200mü (100 to 500mü) (ASTM E 1165-12)
- Constant tube power from 25% of the max. kV
- Homogeneous resolution in the entire radiation field, due to a 20° target angle
As functional models, unipolar tubes with a maximum voltage of 225kV were built. A
resolution of <25µm (2D) and 30lp/mm (CT) could be demonstrated. Due to the steep
target angle of 20°, the difference of the resolution in the entire radiation field is only one
duplex wire. The wide voltage range with constant FS size and target power also enables
the imaging of components made of lightweight materials.
The tests at different OEM's showed that such a MesoFocus tube concept is suitable for
applications previously performed with open MicroFocus tubes. Thus, the advantages of a
closed, robust metal ceramic X-Ray tube are combined with the high resolution of an open
MicroFocus tube. Furthermore, that tube concept is scalable up to 600kV.
Due to the broad applicability of the MesoFocus tube concept, a wide range of applications
(especially inline) can be addressed.
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