Development of small multiaperture negative ion beam sources and related simulation tools

M. Cavenago, V. Antoni, T. Kulevoy, S. Petrenko, G. Serianni, P. Veltrit

Research output: Contribution to conferencePaper

10 Citations (Scopus)

Abstract

In the design of extraction systems for negative ion sources several fundamental questions still deserve further investigation, as the distribution of particles near the extraction sheath, the optimal magnetic structure and the space charge compensation length after acceleration. Large (and undesired) deflection differences may develop between beamlets of a multiaperture source, so that equalization of the magnetic field effect is necessary. To guarantee an uniform strength of filter field at extraction and in the acceleration, several configuration of arrays of permanent magnets were studied and fast simulation tools were developed. As an example of optimized magnetic configuration and as a possible experimental tool, the design of NIOl (Negative Ion Optimization try 1) is here discussed. This project consists of a 3 x 3 matrix of 8 mm extraction holes, aimed at a total H-current about 130 mA with an extraction voltage Vs= - 60 kV. A modular design is used, so several parts (the extraction grid, the acceleration grid, the filter assembly, the source multipoles) can be rotated by 90 degrees for versatility. Space charge compensation was included into a two dimensional self consistent code for negative beams, here used for NIO1 simulation. © 2009 American Institute of Physics.
Original languageEnglish
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event1st International Symposium on Negative Ions, Beams and Sources - , France
Duration: 1 Jan 2009 → …

Conference

Conference1st International Symposium on Negative Ions, Beams and Sources
CountryFrance
Period1/1/09 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Cavenago, M., Antoni, V., Kulevoy, T., Petrenko, S., Serianni, G., & Veltrit, P. (2009). Development of small multiaperture negative ion beam sources and related simulation tools. Paper presented at 1st International Symposium on Negative Ions, Beams and Sources, France. https://doi.org/10.1063/1.3112508