Title :
Design and measurements of prototype Fermilab Main Injector dipole endpacks
Author :
Harding, D.J. ; Glass, H.D. ; Ostiguy, J.-F. ; Brown, B.C. ; Harfoush, F.A. ; Mishra, C.S.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
The end field regions of the dipole for the Fermilab Main Injector contribute significantly to the overall field quality and magnet performance. The end effects which we must control are the variation in effective length as a function of current and the variation in field shape across the magnet aperture. We employed an iterative process of numerical calculations and prototype testing to refine the design of the endpack steel configuration. The final design is an approximation to a Rogowski profile, which limits effective length variation to 1.8 mm per end between 0.1 T and 1.7 T, and includes small shims to compensate for the intrinsic negative sextupole of the ends. We discuss details of the design process and present the effective length, field shape, and harmonics measurements for various endpack designs
Keywords :
beam handling equipment; beam handling techniques; electromagnets; iterative methods; proton accelerators; synchrotrons; 0.1 to 1.7 T; Fermilab Main Injector; Rogowski profile; design process; dipole endpacks; effective length; end field regions; endpack steel configuration; field quality; field shape; harmonics measurements; intrinsic negative sextupole; iterative process; magnet aperture; magnet performance; numerical calculations; proton synchrotron; prototype testing; small shims; Apertures; Length measurement; Magnetic field measurement; Process design; Prototypes; Refining; Shape control; Shape measurement; Steel; Testing;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309475
