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New principle of X-ray generation

16.02.2021

X-rays, which are widely used in medicine, flaw detection and many other fields, are usually obtained using special vacuum devices called X-ray tubes. Inside these tubes, electrons are accelerated by a high electrical potential and collide with a metal anode. The energy of accelerated electrons is transferred to the metal atoms, which pass into an excited state, a complex oscillatory process occurs that generates a radiation flux in the X-ray range.

Unfortunately, the generated radiation flux spreads uniformly in all directions, and the properties of X-rays greatly complicate the task of focusing them and forming a narrow directional beam; moreover, the X-ray pulse front in most cases has an absolutely random shape.

However, physicists from the University of Göttingen have developed a new principle for generating X-rays, which allows you to get a beam directed in a strictly specified direction.

The new technology is based on a structure of three materials with completely different electronic characteristics. And the thickness of such a three-layer "sandwich" is only a few millionths of a millimeter.

An object made from such a thin layered material is placed in place of a metal anode in a conventional X-ray tube. X-ray parameters can be controlled at the stage of production of a multilayer anode by changing the order of alternation and thickness of layers of different materials.

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