Author: Hart, T.
Paper Title Page
MOP051 End-to-End Simulation of an Inverse Cyclotron for Muon Cooling 193
 
  • K. Paul, E. Cormier-Michel
    Tech-X, Boulder, Colorado, USA
  • T. Hart, D.J. Summers
    UMiss, University, Mississippi, USA
 
  Funding: DOE Office of High-Energy Physics, SBIR DE-FG02-08ER85044
Neutrino factories and muon colliders require significant cooling of the muon beam. Most muon cooling channels are long and expensive single-pass structures, due to the difficulty injecting very large emittance beams into a circular device. Inverse cyclotrons can potentially solve the injection problems associated with other circular cooling channels, and they can potentially provide substantial initial cooling of the beam. We present the first end-to-end (injection to extraction) simulations of an inverse cyclotron for muon cooling, performed with the particle-in-cell code VORPAL. We study the cooling capability of the device as well as potential limitations due to space charge effects and material interactions with the beam.
 
 
WEP190 Magnetic Field Expansion Out of a Plane: Application to Cyclotron Development 1846
 
  • T. Hart, D.J. Summers
    UMiss, University, Mississippi, USA
  • K. Paul
    Tech-X, Boulder, Colorado, USA
 
  In studies of the dynamics of charged particles in a cyclotron magnetic field, the specified field is generally Bz in the z = 0 midplane where Br and Btheta are zero. Br(r,theta, z) and Btheta (r,theta, z) are usually determined through a linear expansion which assumes that Bz is independent of z. An expansion to only first order may not be sufficient for orbit simulations at small r and large z. This paper reviews the expansion of a specified Bz(r,theta, z = 0) out of the z = 0 midplane to arbitrary order, and shows simple examples worked out to 4th order.