Effect of electrode shielding on beamletbeamlet interaction in multiaperture sources
Abstract
Extension of previous work on beamletbeamlet interaction is made in two phases. The effect of beam spacecharge truncation due to electrode shielding is considered. For a typical geometry multiaperture source, the ion divergence is thus reduced by a factor of 30, assuming all the beamlets interact with each other, and by a factor of 5, assuming only nearestneighbor beamlets interact. To account accurately for electrode shielding, a direct solution to the PoissonVlasov equation was made for a similar physical situation. For a typical circumstance it shows an additional decrease of a factor of 5 for both the global and nearestneighbor calculation. These results indicate that beamletbeamlet interaction is small for typical ion sources.
 Publication:

Applied Physics Letters
 Pub Date:
 October 1978
 DOI:
 10.1063/1.90533
 Bibcode:
 1978ApPhL..33..697W
 Keywords:

 Electrostatic Shielding;
 Ion Beams;
 Ion Sources;
 Particle Interactions;
 Plasma Electrodes;
 Apertures;
 Aspect Ratio;
 Controlled Fusion;
 Energy Technology;
 Poisson Equation;
 Space Charge;
 Vlasov Equations;
 Plasma Physics;
 41.80.Gg;
 07.77.+p;
 29.25.Cy