Author: Knowles, C.
Paper Title Page
NACB02 Status of the High-Current EBIS Charge Breeder for the Facility for Rare Isotope Beams 172
 
  • H.J. Son, A.I. Henriques, C. Knowles, A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
  • E.N. Beebe
    BNL, Upton, New York, USA
  • D.B. Crisp, A. Lapierre, S. Nash
    NSCL, East Lansing, Michigan, USA
 
  Funding: work supported by the National Science Foundation under Grant No. PHY-1565546
The ReA post-accelerator of the National Supercon-ducting Cyclotron Laboratory (NSCL) at Michigan State University includes an Electron-Beam Ion Trap (EBIT) operating as a charge breeder. The Facility for Rare Iso-tope Beams (FRIB) is being implemented. After comple-tion, rare-isotopes beam rates are expected to exceed in some case 10<sup>10</sup> particles per second (pps). The charge capacity of the ReA EBIT is insufficient to handle those rates. Therefore, parts of the TEST EBIS from the Brookhaven National Laboratory (BNL) were transferred to the NSCL to build a High-Current Electron-Beam Ion Source (HCEBIS). The HCEBIS features an electron gun that can provide a current up to 4 A for an estimated trap charge capacity of 10<sup>11</sup> elementary charges. This paper presents the HCEBIS specifications, electron-beam cur-rent measurements to test its cathode, and simulation results for its implementation in the ReA post-accelerator. It also presents charge-capacity measurements conducted with the ReA EBIT that demonstrate that the HCEBIS will be able to handle beam rates of more than 10<sup>10</sup> pps.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-NACB02  
About • Received ※ 30 September 2020 — Revised ※ 01 October 2020 — Accepted ※ 30 November 2020 — Issue date ※ 13 March 2021
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