results for au:Planche_T in:physics
The purpose of this paper is to provide a clear guidance for designing practical and optimum shims for magnetic and electrostatic dipoles. We put a particular focus on reviewing the pioneer work from Rose [Rose 1938]. We show how to design Rose's shim taking into account the effect of magnetic saturation. We also discuss the application of similar shims to electrostatic cylindrical, toroidal, and spherical electrostatic benders. We verify the validity of our approach using finite element calculations, and illustrate it with actual dipole designs. In conclusion we show that the results presented here can straightforwardly be applied to quadrupoles, sextupules, etc.
Application of the symplectic particle-in-cell algorithm proposed by H.~Qin \it et al. to space-charge in cyclotrons.
The next generation of lepton flavor violation experiments need high intensity and high quality muon beams. Production of such beams requires sending a short, high intensity proton pulse to the pion production target, capturing pions and collecting the resulting muons in the large acceptance transport system. The substantial increase of beam quality can be obtained by applying the RF phase rotation on the muon beam in the dedicated FFAG ring, which was proposed for the PRISM project.This allows to reduce the momentum spread of the beam and to purify from the unwanted components like pions or secondary protons. A PRISM Task Force is addressing the accelerator and detector issues that need to be solved in order to realize the PRISM experiment. The parameters of the required proton beam, the principles of the PRISM experiment and the baseline FFAG design are introduced. The spectrum of alternative designs for the PRISM FFAG ring are shown. Progress on ring main systems like injection and RF are presented. The current status of the study and its future directions are discussed.