A novel beam focus control at the entrance to the ANU 14UD accelerator

M. De Cesare, D. C. Weisser, L. K. Fifield, T. B. Tunningley, N. R. Lobanov

    Research output: Contribution to journalConference articlepeer-review

    5 Citations (Scopus)

    Abstract

    Tandem electrostatic accelerators often require the flexibility to operate at variety of terminal voltages to cater for various user needs. However beam transmission will only be optimal for a limited range of terminal voltages. This paper describes a focussing system that greatly expands the range of terminal voltages for optimal transmission. This is achieved by controlling the gradient of the entrance of the low-energy tube providing an additional controllable focusing element. Up to 150 kV is applied to the fifth electrode of the first unit of the accelerator tube giving control of the tube entrance lens strength. Beam tests to confirm the efficacy of the lens have been performed. These tests demonstrate that the entrance lens control eliminates the need to short out sections of the tube for low terminal voltage operation.

    Original languageEnglish
    Article number03008
    JournalEPJ Web of Conferences
    Volume63
    DOIs
    Publication statusPublished - 2013
    EventHeavy Ion Accelerator Symposium 2013 - Canberra, ACT, Australia
    Duration: 8 Apr 201312 Apr 2013

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