Author: Johnstone, C.
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MOPOY060 Performance Analysis for the New g-2 Experiment at Fermilab 996
 
  • D. Stratakis, M.E. Convery, C. Johnstone, J.A. Johnstone, J.P. Morgan, M.J. Syphers
    Fermilab, Batavia, Illinois, USA
  • J.D. Crmkovic, W. Morse, V. Tishchenko
    BNL, Upton, Long Island, New York, USA
  • N.S. Froemming
    University of Washington, CENPA, Seattle, USA
  • M. Korostelev
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • M. Korostelev
    Lancaster University, Lancaster, United Kingdom
 
  The new g-2 experiment at Fermilab aims to measure the muon anomalous magnetic moment to a precision of ±0.14 ppm ─ a fourfold improvement over the 0.54 ppm precision obtained in the g-2 BNL E821experiment. Achieving this goal requires the delivery of highly polarized 3.094 GeV/c muons with a narrow ±0.5% Δp/p acceptance to the g-2 storage ring. In this study, we describe a muon capture and transport scheme that should meet this requirement. First, we present the conceptual design of our proposed scheme wherein we describe its basic features. Then, we detail its performance numerically by simulating the pion production in the (g-2) production target, the muon collection by the downstream beamline optics as well as the beam polarization and spin-momentum correlation up to the storage ring. The sensitivity in performance of our proposed channel against key parameters such as magnet apertures and magnet positioning errors is analyzed  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY060  
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TUPOY022 A Fixed Field Alternating Gradient Accelerator for Helium Therapy 1953
 
  • J. Taylor
    IIAA, Huddersfield, United Kingdom
  • T.R. Edgecock, R. Seviour
    University of Huddersfield, Huddersfield, United Kingdom
  • S. Green
    University Birmingham, Birmingham, United Kingdom
  • C. Johnstone
    PAC, Batavia, Illinois, USA
 
  A non-scaling fixed field alternating gradient (nsFFAG) accelerator is being designed for helium ion therapy. This facility will consist of 2 nested superconducting rings, treating with helium ions (He2+) and image with hydrogen ions (H2+). Compared to protons, ions deliver a more conformal dose with a significant reduction in range straggling and beam broadening. Carbon ions are currently used and there are no current facilities providing helium therapy. We are investigating the feasibility of an FFAG approach for helium therapy, which has never been previously considered. We investigate emittance and demonstrate that the machine meets isochronicity requirements for fixed frequency RF.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY022  
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TUPOY023 A Compact and High Current FFAG for the Production of Radioisotopes for Medical Applications 1957
 
  • D. Bruton, R.J. Barlow, T.R. Edgecock, R. Seviour
    University of Huddersfield, Huddersfield, United Kingdom
  • C. Johnstone
    PAC, Batavia, Illinois, USA
 
  A low energy Fixed Field Alternating Gradient (FFAG) accelerator has been designed for the production of radioisotopes. Tracking studies have been conducted using the OPAL code, including the effects of space charge. Radioisotopes have a wide range of uses in medicine, and recent disruption to the supply chain has seen a renewed effort to find alternative isotopes and production methods. The design features separate sector magnets with non-scaling, non-linear field gradients but without the counter bends commonly found in FFAG's. The machine is isochronous at the level of 0.3% up to at least 28 MeV and hence able to operate in Continuous Wave (CW) mode. Both protons and helium ions can be used with this design and it has been demonstrated that proton beams with currents of up to 20 mA can be accelerated. An interesting option for the production of radioisotopes is the use of a thin internal target. We have shown that this design has large acceptance, ideal for allowing the beam to be recirculated through the target many times, the lost energy being restored on each cycle. In this way, the production of Technetium-99m, for example, can take place at the optimum energy.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY023  
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