Figure 1. Bringing the object closer to the x-ray source achieves high magnification, and using an MFX source results in a sharper magnified image.
In a sealed-type MFX tube, the cathode and anode target components are inside a vacuum glass envelope which cannot be broken open. Sealed-type tubes tend to have larger focal spot sizes, are extremely robust, and are generally used in factory environments and where compact design is needed.
In an open-type MFX tube, the cathode and anode target are in a special housing that is externally vacuum-pumped, allowing the components to be accessed for maintenance. This allows the open-source tube to be driven harder (higher kV) at smaller focal spot sizes since the user will be able to replace components that tend to wear out faster at these harder conditions. However, the users must have a significant level of x-ray sophistication to do so.
Figure 2. Sealed-type MFX (left) and open-type MFX (right).
Andrew Fay is an Applications Engineer specializing in x-ray sources, detectors, and imaging software. He has extensive knowledge of and experience in x-ray components and complete imaging solutions for medical and industrial applications. When not helping customers implement Hamamatsu’s latest x-ray technology, Andrew enjoys spending time with his family, landscape design, visiting art museums, and playing golf.
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