Author: Prebys, E.
Paper Title Page
THPMP051 Development of 211-Astatine Production in the Crocker Nuclear Laboratory Cyclotron 3564
 
  • E. Prebys
    Fermilab, Batavia, Illinois, USA
  • R.J. Abergel
    UCB, Berkeley, California, USA
  • W.H. Casey
    University of California at Davis (UC Davis), Davis, California, USA
  • D.A. Cebra
    UCD, Davis, California, USA
  
  There is a great deal of interest in the medical community in the use of the alpha-emitter 211-At as a therapeutic isotope. Among other things, its 7.2 hour half life is long enough to allow for recovery and labeling, but short enough to avoid long term activity in patients. Unfortunately, the only practical technique for its production is to bombard a 209-Bi target with a ~29 MeV alpha beam, so it is not accessible to commercial isotope production facilities, which all use fixed energy proton beams. The US Department of Energy is therefore supporting the development of a "University Isotope Network" (UIN) to satisfy this need. Our prposoal is to retrofit the variable-energy, multi-species cyclotron at the Crocker Nuclear Laboratory at the University of California Davis with an internal Bi-209 target, such that we can put at least 100 uA of 29 MeV alpha particles on target without concerns about extraction efficiency. Using very conservative assumptions, we are confident we will be able to produce 60 mCi of 211-At in solution in an eight hour shift, which includes setup, exposure, and chemical recovery. This poster will cover the design of the target, as well as the required chemical processing and reliability upgrades.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPMP051  
About • paper received ※ 15 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
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WEPGW106 Statistical Measurement of Longitudinal Beam Halo in Fermilab Recycler 2742
 
  • E. Prebys, T.M. Nguyen
    UCD, Davis, California, USA
  • A.S. Dyshkant, D. Hedin
    Northern Illinois University, DeKalb, Illinois, USA
  • A. Gaponenko
    Fermilab, Batavia, Illinois, USA
  • R.J. Hooper
    Lewis University, Romeoville, Illinois, USA
  • M. Jones
    Purdue University, West Lafayette, Indiana, USA
  
  Funding: This work supported by US Department of Energy Contract DE-AC02-07CH11359
The formation of non-Gaussian halo in both the transverse and longitudinal dimensions of beam bunches has been notoriously difficult both the model and to measure. We present a technique to measure the longitudinal halo of 2.5 MHz bunches in the Fermilab Recycler, which have been formed for the g-2 anomalous magnetic moment experiment. While out of time beam is not a particular concern to this experiment, it is a key issue for the subsequent Mu2e rare muon decay experiment, which will use the same bunch formation procedure. Our measurement relies on a statistical technique, in which a small fraction of the beam is scattered from the primary collimation foil in the recycler, and then is detected by a charge telescope consisting of quartz Cherenkov radiators and photomultiplier tubes. By integrating over many revolutions, the time profile of longitudinal halo (out-of-time beam) can be measured down to less than a 10-5 fractional level, relative to in-time beam. These results can then be compared to simulations. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPGW106  
About • paper received ※ 15 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)