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Zajic, V.

Paper Title Page
TUPAS083 Design and Performance of the Matching Beamline between the BNL EBIS and an RFQ 1844
  • J. G. Alessi, E. N. Beebe, J. Brodowski, A. Kponou, M. Okamura, A. I. Pikin, D. Raparia, J. Ritter, L. Snydstrup, V. Zajic
    BNL, Upton, Long Island, New York
  Funding: Work performed under the auspices of the U. S. Department of Energy and the U. S. National Aeronautics and Space Administration.

A part of a new EBIS-based heavy ion preinjector, the low energy beam transport (LEBT) section between the high current EBIS and the RFQ is a challenging design, because it must serve many functions. In addition to the requirement to provide an efficient matching between the EBIS and the RFQ, this line must serve as a fast switchyard, allowing singly charged ions from external sources to be transported into the EBIS trap region, and extracted, highly charged ions to be deflected to off-axis diagnostics (time-of-flight, or emittance). The space charge of the 5-10 mA extracted heavy ion beam is a major consideration in the design, and the space charge force varies for different ion beams having Q/m from 1-0.16. The line includes electrostatic lenses, spherical and parallel-plate deflectors, magnetic solenoid, and diagnostics for measuring current, charge state distributions, emittance, and profile. A prototype of this beamline has been built, and results of tests will be presented.