Effect of electrode shielding on beamlet-beamlet interaction in multiaperture sources
Abstract
Extension of previous work on beamlet-beamlet interaction is made in two phases. The effect of beam space-charge 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 nearest-neighbor beamlets interact. To account accurately for electrode shielding, a direct solution to the Poisson-Vlasov 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 nearest-neighbor calculation. These results indicate that beamlet-beamlet 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