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Use of axially symmetric electrostatic fields for ion beam focussing

Conference · · IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:5375987
The 1/r electric field obtained between charged coaxial cylindrical electrodes is useful for focussing hollow ion beams in ion microprobe and ion implantation applications. The focussing strengths are mass independent at nonrelativistic energies. Focussed particle densities can be enhanced by using a diverging-converging pair to flatten the dependence of focal length on incoming beam radius. Transport of 425 keV and 1 MeV protons has been simulated and results are presented.
Research Organization:
Physics Division, Argonne Nat.'l Lab., Argonne, IL 60439
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5375987
Report Number(s):
CONF-830311-
Conference Information:
Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-30:4
Country of Publication:
United States
Language:
English