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RIS citation export for THPAB055: Modelling of Curvilinear Electrostatic Multipoles in the Fermilab Muon g-2 Storage Ring

AU - Herrod, A.T.
AU - Bailey, I.R.
AU - Jones, S.
AU - Korostelev, M.
AU - Wolski, A.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Modelling of Curvilinear Electrostatic Multipoles in the Fermilab Muon g-2 Storage Ring
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14–19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - The Fermilab Muon g-2 Experiment (E989) contains flat-plate electrostatic quadrupoles, curved with the reference trajectory as defined by the constant, uniform magnetic dipole field. To understand the beam behaviour at a sufficient level, we require fast, high-accuracy particle tracking methods for this layout. Standard multipole fits to numerically calculated 2D transverse electric field maps have provided a first approximation to the electric field within the main part of the quadrupole, but cannot model the longitudinal curvature or extended fringe fields of the electrostatic plates. Expressions for curvilinear multipoles can be fit to a 2D transverse slice taken from the central point of a numerically calculated 3D electric field map of the quadrupole, providing a curved-multipole description. Generalised gradients can be used to model the fringe field regions. We present the results of curvilinear multipole and generalised gradient fits to the curved quadrupole fields, and the differences in tracking using these fields over 200 turns of a model of the storage ring in BMAD.
CP - Geneva, Switzerland
SP - 3837
EP - 3839
KW - multipole
KW - quadrupole
KW - emittance
KW - storage-ring
KW - lattice
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-THPAB055
UR - http://jacow.org/ipac2017/papers/thpab055.pdf
ER -