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Abrams, R.J.

Paper Title Page
MOPEA043 Quasi-Monoenergetic Photon Source Based on Electron-Positron In-Flight Annihilation 169
 
  • A. Afanasev, R.J. Abrams, C.M. Ankenbrandt, K.B. Beard, R.P. Johnson, T.J. Roberts, C. Y. Yoshikawa
    Muons, Inc, Batavia
  • M. Popovic
    Fermilab, Batavia
  
 

We study electron-positron in-flight annihilation as a potential source of quasi-monoenergetic photon (or gamma-ray) beams. A high-intensity tunable-energy (1.5 MeV to 15 MeV) gamma source has many potential uses in medical, industrial and security applications. Several electron-positron collision geometries are considered: a) head-on; b) collinear; and c) positron beam incident on a fixed electron target. We analyze advantages of each of the geometries in order to optimize parameters of the generated gamma-ray beams.

  
MOPEA044 Quasi-monochromatic Positrons using Dipole and Wedge 172
 
  • R.J. Abrams, C.M. Ankenbrandt, C. Y. Yoshikawa
    Muons, Inc, Batavia
  
 

Positrons produced by electrons impinging on a target cover a broad momentum range. By bending the positrons 180° in a dipole magnetic field the momenta are dispersed according to their momenta along the exit plane of the magnet. A wedge-shaped absorber placed at the exit plane can reduce the momenta accordingly to produce a quasi-monochromatic beam of positrons. Simulation results are presented for 2 to 10 MeV/c quasi-mono-chromatic positrons produced by 75 MeV electrons on a tungsten target.

  
MOPEA045 Positron Production for a Compact Tunable Intense Gamma Ray Source 175
 
  • C. Y. Yoshikawa, R.J. Abrams, A. Afanasev, C.M. Ankenbrandt, K.B. Beard
    Muons, Inc, Batavia
  • D.V. Neuffer
    Fermilab, Batavia
  
 

A compact tunable gamma ray source has many potential uses in medical and industrial applications. One novel scheme to produce an intense beam of gammas relies on the ability to create a high flux of positrons. We present various positron production methods that are compatible with this approach for producing the intense beam of gammas.

  
THPD074 Using Project X as a Proton Driver for Muon Colliders and Neutrino Factories 4452
 
  • G. Flanagan, R.J. Abrams, C.M. Ankenbrandt, M.A.C. Cummings, R.P. Johnson
    Muons, Inc, Batavia
  • M. Popovic
    Fermilab, Batavia
  
 

The designs of accelerator systems that will be needed to transform Fermilab's Project X into a high-power proton driver for a muon collider and/or a neutrino factory are discussed. These applications require several megawatts of beam power delivered in tens or hundreds of short multi-GeV bunches per second, respectively. Project X may require a linac extension to higher energy for this purpose. Other major subsystems that are likely to be needed include storage rings to accumulate and shorten the proton bunches and an external beam combiner to deliver multiple bunches simultaneously to the pion production target.