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Example research essay topic: Electrons Collide Focal Spot Rays - 222 words

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Production of x-rays requires training a stream of electrons produced at a metal cathode on a metal anode. As the electrons collide with atoms in the anode, they are stopped but their energy is released in two forms mostly heat and a very small quantity (1 %) as x-rays. The area ofthe cathode where the fast moving electrons collide is called the focal spot and is in fact the source of the x-rays. The x-rays generated at the focal spot travel out in all directions. However, the head of the x-ray machine is constructed in such a way as to absorb stray radiation and at the same time emit a central beam, which emerges from the cone and is the useful beam. The x-rays traveling in the central beam are not continous, but are emitted in pulses of 1 / 120 of a second due to the fact that are produced by 60 cycle per second AC current.

In addition, as Fitzgerald points out, the x-rays diverge as they proceed from the target, which is not simply a point but an area with finite dimensions no matter how small. These features of the central beam are essential to the understanding of what we do to produce x-ray images and what we realy see as we interpret the record of the object radiographer.


Free research essays on topics related to: spot, beam, rays, electrons, x rays

Research essay sample on Electrons Collide Focal Spot Rays

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