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Ionization-Recombination Process as a Means of Indicating the Degree of Focusing of a Beam of Charged Particles or Ionizing Radiation

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Abstract

A method for controlling the focusing of an ionizing-radiation beam, for example, a beam of charged particles, is proposed. Ionization is one of the most widely used radiation-detection methods. The effect of the recombination of charge carriers in the working substance of the detector, accompanying ionization, is usually considered as undesirable, which reduces the accuracy of measuring the radiation parameters. However, this effect can be useful and be the basis of a method for determining the maximum degree of focusing of a beam of particles or ionizing radiation. At a fixed value of the total beam current (ionizing-radiation flux), the maximum focusing is determined from the minimum value of the ionization current in a wide-aperture ionization chamber, which is used as a detector. The signal of the ionization chamber changes during focusing even at a fixed value of the beam current due to the dependence of the intensity of the recombination of charge carriers in the working substance of the chamber on their bulk density. The bulk density of carriers, in turn, is proportional to the distribution density of particles of the ionizing-radiation beam in the volume of the working medium of the ionization chamber.

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Authors and Affiliations

  1. Belgorod State University, 308015, Belgorod, Russia

    S. V. Blazhevich & A. V. Noskov

  2. Belgorod State Technological University, 308012, Belgorod, Russia

    A. V. Noskov

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  1. S. V. Blazhevich
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  2. A. V. Noskov
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Correspondence to S. V. Blazhevich.

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Blazhevich, S.V., Noskov, A.V. Ionization-Recombination Process as a Means of Indicating the Degree of Focusing of a Beam of Charged Particles or Ionizing Radiation. J. Surf. Investig. 16, 503–506 (2022). https://doi.org/10.1134/S1027451022030235

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  • DOI: https://doi.org/10.1134/S1027451022030235

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