Effect of the Gap Size between the Cathode and the Wehnelt Cylinder Bore on the Emittance of the Thermionic Electron Gun

Authors

  • Najia Abdullah Mohammed Department of Physics, College of Science, University of Mosul https://orcid.org/0000-0001-8897-1159
  • Abdullah Idrees Al-Abdullah Department of Physics, College of Science, University of Mosul

DOI:

https://doi.org/10.24996/ijs.2022.63.8.14

Keywords:

SIMION8.0 program, beam emittance, thermionic electron gun design

Abstract

This paper includes simulating an electron gun design to investigate the effect of the distance between the cathode and the Wehnelt cylinder bore on the quality of the ion beam emittance and to obtain the best distance of that geometrical factor. A study of a group of designs was conducted to find this distance. The SIMION8.0 program has been used to calculate the trajectories of the electrons with initial kinetic energy of (0.1 eV) and electron current of (1×10-12 A). The investigation also includes comparisons between the equipotential line trajectories for each design as well as the field distribution and the electron trajectories. The best emittance distance was concluded to be (3 mm).

Downloads

Download data is not yet available.

Downloads

Published

2022-08-31

How to Cite

Mohammed, N. A. ., & Al-Abdullah, A. I. . (2022). Effect of the Gap Size between the Cathode and the Wehnelt Cylinder Bore on the Emittance of the Thermionic Electron Gun. Iraqi Journal of Science, 63(8), 3382–3389. https://doi.org/10.24996/ijs.2022.63.8.14

Issue

Section

Physics