Electrostatic focusing of directly heated linear filament gun using EGUN

Munawar Iqbal, M. A.K. Lodhi, Zahid Majeed, Dimitri Batani

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This paper presents the optimization of a line source rectangular electron gun using electrostatic focusing. We optimized the gun by shaping the configuration of its electrodes in order to achieve the desired focusing characteristics, namely maximum focusing distance and minimum beam spread. The optimization has been carried out using the software EGUN. We have also simplified the gun design using only one focusing electrode at the same potential as that of the cathode and by avoiding magnetic focusing field, separate focusing electrodes and additional power supply, thus minimizing the cost without any loss in its accuracy and efficient performance. This gun with the optimum configuration was used in actual experiment and the results of the simulation were compared with the experimental measurements.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
StatePublished - Jun 11 2011


  • Axial focusing distance
  • EGUN
  • Line source
  • Minimum beam spread


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