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Simulation and Analysis of the Accelerator Set and the Electromagnetic Focusing Lenses

  • Research Article - Physics
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Abstract

Electron gun is being considered as the main source of electron generation in microwave tubes and linear accelerators. In this paper, after confirming of CST validation, the thermionic electron gun used in the available electron linear accelerator which can accelerate electrons to 50 keV is investigated. The electrodes of this gun are designed so that electron beam with the initial radius of 3.9 mm finally reaches the current of 10 mA at the focusing point. For the purpose of convergence and steering the beam at a distance of 290 mm from the cathode, where pre-buncher is situated, electromagnetic focusing lenses are placed after the electrodes of the above-mentioned gun. This system focuses the beam to radius of 2.1 mm at the location of the pre-buncher. Also, changes in the effective parameters of the electron gun under the influence of the magnetic field are studied. Finally, changes in the current density were evaluated for changes in the cathode materials and temperature. Determining the maximum allowable operating temperature range for the change of emitter material is another achievement.

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Authors and Affiliations

  1. Radiation Application Department, Shahid Beheshti University, P.O. Box 1983963113, Evin-Daneshju Blvd., Tehran, 0098, Iran

    Sima Ahmadian & Fereydoon Abbassi Davani

  2. Atomic Energy Organization of Iran, P.O. Box 14155-4494, North Kargar Ave., Tehran, 0098, Iran

    Farshad Ghasemi

Authors
  1. Sima Ahmadian
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  2. Fereydoon Abbassi Davani
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  3. Farshad Ghasemi
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Correspondence to Sima Ahmadian.

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Ahmadian, S., Davani, F.A. & Ghasemi, F. Simulation and Analysis of the Accelerator Set and the Electromagnetic Focusing Lenses. Arab J Sci Eng 39, 581–591 (2014). https://doi.org/10.1007/s13369-013-0818-4

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  • DOI: https://doi.org/10.1007/s13369-013-0818-4

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