BobP
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Why does increasing the kVp in x-ray production increase the number of x-ray photons if the number of electrons produced by the cathode is unchanged? thanks
Increasing the kilovolt peak (kVp) in x-ray production directly increases the number of x-ray photons generated, even when the number of electrons emitted from the cathode remains constant. This phenomenon occurs because higher kVp accelerates electrons to greater energies, resulting in increased Bremsstrahlung radiation, which contributes to a higher intensity of continuous x-rays. Additionally, the intensity of characteristic x-rays also rises as the number of electron transitions increases, although only about one percent of the input energy is converted into x-ray photons.
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BobP said:Why does increasing the kVp in x-ray production increase the number of x-ray photons if the number of electrons produced by the cathode is unchanged? thanks
thanksdrvrm said:i think the increase in tube voltage accelerates the electrons to higher energy and radiation from accelerated/decelerated charge "Bremsstrahlung" increases thus increasing the x-ray intensity/number of photons-these radiations are of continuous nature and fall in the range of continuous x-rays. however the characteristic x-rays which are characteristic of the target -also increases in intensity as number of transitions increases - hardly one percent of the energy input gets out as x-rays.