Design, Fabrication and Test of Thermionic Electron Beam Emitter Assemblies
|Start||2016/10/11（Tue） 3:00 PM|
|End||2016/10/11（Tue） 4:00 PM|
|Venue||Meeting room, 7F, 3-gokan building.|
|Speaker||Dr. Munawar Iqbal (Centre for High Energy Physics, University of the Punjab, Pakistan)|
|Contact||K. Furukawa (PHS 4316)|
Thermionic DC electron beam guns have been designed and then fabricated for test of the beam at 10kV of acceleration potential. Beam optics analyses were performed using electron beam trajectory program (EGUN) and CST (CST-PS). The guns are in diode configurations with planar geometry of the electrodes. The focusing electrodes were placed at the same potential of cathode without any extra biasing or Whenelt elctrode. From these novel designs, well-focused and parallel beam of electrons, with beam current (42mA-5A), emission density (5.04-6.72 A/cm2), power density (5.04.ANW104-6.72NW104 w/cm2) and normalized emittance (0.51-31.72 π-mm-mR) were obtained. The designs are simple and inexpensive. These guns are useful for metallurgical applications and for accelerator technology due to high emission and low emittance of the beam.