Author: Stratakis, D.
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TUPMR028 Spin Correlations Study for the New g-2 Experiment at Fermilab 1301
 
  • D. Stratakis, J.D. Crnkovic, W. Morse, V. Tishchenko
    BNL, Upton, Long Island, New York, USA
  
  The muon g-2 experiment executed at Brookhaven concluded in 2001 and measured a discrepancy of more than three standard deviations compared to the Standard Model (SM) calculation. A new initiative at Fermilab is under construction to improve the experimental accuracy four-fold. Achieving this goal, however, 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 examine systematic errors that can arise from correlations between muon spin and transverse coordinates for the new g-2 experiment. To achieve this goal we perform end-to-end spin tracking simulations from the production target up to the ring injection point and compare our findings against the results from the Brookhaven experiment. We detail similarities and differences.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR028  
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TUPMY044 Carbon and Mercury Target Systems for Muon Colliders and Neutrino Factories 1641
 
  • K.T. McDonald
    PU, Princeton, New Jersey, USA
  • J.S. Berg, H.G. Kirk, D. Stratakis
    BNL, Upton, Long Island, New York, USA
  • X.P. Ding
    UCLA, Los Angeles, California, USA
  
  Funding: Work supported in part by US DOE Contract NO. DE-AC02-98CH110886
A high-power target is required to convert a powerful MW-class proton beam into an intense muon source or neutrino source in support of physics at the intensity frontier. The first phase of a Muon Collider or Neutrino Factory program may use a 6.75-GeV proton driver with beam power of only 1 MW. At this lower power it is favorable to use a graphite target with beam and target tilted slightly to the axis of a 20-T pion-capture solenoid around the target. Using the MARS15 (2014) code, we optimized the geometric parameters of the beam and target to maximize particle production at low energies by an incoming proton beam with kinetic energy of 6.75 GeV impinging on this carbon target. We also studied beam-dump configurations to suppress the rate of undesirable high-energy secondary particles in the beam. For a possible upgrade to a proton beam of multi-MW power, we considered a free-flowing mercury jet. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY044  
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WEPMW001 End-to-End Beam Simulations for the New Muon G-2 Experiment at Fermilab 2408
 
  • M. Korostelev, I.R. Bailey, A. Wolski
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • I.R. Bailey
    Lancaster University, Lancaster, United Kingdom
  • A. Herrod, A. Wolski
    The University of Liverpool, Liverpool, United Kingdom
  • J.P. Morgan
    Fermilab, Batavia, Illinois, USA
  • W. Morse, D. Stratakis, V. Tishchenko
    BNL, Upton, Long Island, New York, USA
  
  The aim of the new muon g-2 experiment at Fermilab is to measure the anomalous magnetic moment of the muon with an unprecedented uncertainty of 140 ppb. A beam of positive muons required for the experiment is created by pion decay. Detailed studies of the beam dynamics and spin polarization of the muons are important to predict systematic uncertainties in the experiment. In this paper, we present the results of beam simulations and spin tracking from the pion production target to the muon storage ring. The end-to-end beam simulations are developed in Bmad and include the processes of particle decay, collimation (with accurate representation of all apertures) and spin tracking.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW001  
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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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