Title :
Beam profile of a parallel plane electrodes focusing system
Author :
Salam, F.W.A. ; Moustafa, O.A. ; EL-Khabeary, T.
Author_Institution :
Dept. of Accel. & Ion Sources, Atomic Energy Authority, Cairo, Egypt
Abstract :
The present work investigates the potential distribution in a five electrode lens to be used in an electrostatic ion source. The beam profile shape has been investigated using different gases. The radii of the beam profile along the axial distance using N2 gas are calculated for different perveances, different initial beam radii, different ion charges, and different ratios of voltage magnitude. It has been found that a minimum beam radius of 0.22 mm can be obtained for initial beam radius equal 2.5 mm using N2 gas. The present lens constitutes a convergent lens. It gives a more focused beam than the case of two hemispherical electrodes and an intermediate flat electrode
Keywords :
electric potential; electrostatic lenses; ion sources; particle beam focusing; axial distance; beam profile shape; beam radii; convergent lens; electrostatic ion source; five electrode lens; focused beam; ion charges; parallel plane electrodes focusing system; perveances; potential distribution; radii; voltage magnitude; Electrodes; Electrostatics; Equations; Ion accelerators; Ion beams; Ion sources; Lenses; Nitrogen; Particle beam optics; Particle beams;
Conference_Titel :
Radio Science Conference, 1999. NRSC '99. Proceedings of the Sixteenth National
Conference_Location :
Cairo
Print_ISBN :
977-5031-62-1
DOI :
10.1109/NRSC.1999.760949
