CERN Accelerating science

Preprint
Report number	CERN-SL-2000-011-AP ; CERN-NEUTRINO-FACTORY-NOTE-21 ; CERN-NUFACT-NOTE-21
Title	Fringe Fields and Dynamic Aperture in the FNAL Muon Storage Ring
Author(s)	Zimmermann, Frank ; Berz, M ; Erdélyi, B ; Johnstone, C ; Makino, K ; Wan, W
Affiliation	(CERN) ; (Fermilab) ; (Michigan State Univ. East Lansing)
Corporate author(s)	CERN. Geneva. SL (SPS+LEP) Division
Publication	2000
Imprint	4 May 2000
Number of pages	21
Series	(Report)
Subject category	Accelerators and Storage Rings
Abstract	Quadrupole fringe fields can limit the dynamic aperture of muon storage rings.Using the computer code COSY INFINITY for particle tracking and normal-form analysis, we evaluate the importance of fringe fields in the FNAL muon storage ring, and identify the regions of the machine where they are most critical. Dynamic aperture and linear tune shifts with amplitude are calculated considering an ideal machine without any errors or misalignments. We also explore the efficiency of various nonlinear correction schemes, study the momentum acceptance, and evaluate the spin decoherence over the transverse phase space.
Submitted by	[email protected]