Permanent magnet design for the Fermilab Main Injector Recycler ring

Author

Foster, G.W. ; Bertsche, K. ; Ostiguy, J.-F. ; Brown, B. ; Glass, H. ; Jackson, G. ; May, M. ; Orris, D. ; Gustafson, Dick

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

Volume

2

fYear

1995

fDate

1-5 May 1995

Firstpage

1298

Abstract

The design of permanent magnets for use in the Fermilab Main Injector “Recycler” ring is described. The magnets are a hybrid design with the field shape determined from accurately machined pole tips and the field driven by strontium ferrite blocks. The choice of magnetic material is discussed. A temperature compensation scheme has been demonstrated which uses a low Curie-temperature alloy to null out the intrinsic temperature coefficient to the ferrite. 1.2 m prototype magnets have been constructed which achieve the design goal of dB/B<10-4 over an aperture of 3.5"(h)×2"(v)

Keywords

accelerator magnets; permanent magnets; proton accelerators; storage rings; 1.2 m; Fermilab Main Injector; Recycler ring; Sr ferrite; Sr-Fe; intrinsic temperature coefficient; low Curie-temperature alloy; temperature compensation scheme; Apertures; Assembly; Ferrites; Magnetic materials; Permanent magnets; Prototypes; Shape memory alloys; Strontium; Structural beams; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505203

Filename

505203