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Note: Characteristic beam parameter for the line electron gun.

M Iqbal1, G U Islam, Z Zhou

  • 1Centre for High Energy Physics, University of the Punjab, Lahore 45590, Pakistan.

The Review of Scientific Instruments
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Summary
This summary is machine-generated.

We optimized an electron gun using electrostatic focusing, achieving a 0.5 mm beam diameter and 68.9 kW/cm² power density. This simpler, more powerful design surpasses previous results.

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Area of Science:

  • Physics
  • Accelerator Physics
  • Electron Optics

Background:

  • Electron guns are crucial components in particle accelerators and other scientific instruments.
  • Optimizing beam parameters is essential for maximizing performance and power density.
  • Previous designs often relied on complex magnetic and electrostatic focusing systems.

Purpose of the Study:

  • To optimize the beam parameters of a line source electron gun.
  • To achieve higher power density using electrostatic focusing only.
  • To simplify the electron gun design by eliminating magnetic components.

Main Methods:

  • Utilized the Stanford Linear Accelerator Centre electron beam trajectory program (EGUN) for simulation.
  • Employed electrostatic focusing exclusively.
  • Validated theoretical results through experimental operation.

Main Results:

  • Achieved a minimum beam diameter of 0.5 mm.
  • Attained a power density of 68.9 kW/cm² in the post-anode region.
  • Demonstrated a more than twofold increase in power density compared to previous studies.

Conclusions:

  • The optimized electron gun design is simpler and more powerful.
  • Electrostatic focusing alone can yield significantly improved beam characteristics.
  • The experimental results validate the theoretical optimizations performed with EGUN.