Field measurements of superconducting bending magnets for compact storage ring

Author

Matsuda, T. ; Takeuchi, T. ; Yamamoto, S. ; Morita, M. ; Kodera, I. ; Kawaguchi, T. ; Koujiro, T. ; Nakamura, S. ; Yamada, T.

Author_Institution

Mitsubishi Electr. Corp., Hyogo, Japan

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

871

Lastpage

874

Abstract

We have constructed 180 degree superconducting bending magnets for compact electron storage rings and tests of magnetic field qualities of the magnets have been performed. Measured field qualities are; (1) high field homogeneity (normalized field errors are less than 1/spl times/10/sup -3/ over the electron beam aperture), (2) high field stability (the decay of the field is less than 0.1%/year) at persistent current mode of 3.5 T, (3) small gradient of coil axis (the averaged value is 0.5 mrad), and (4) small difference of the fields between two magnets (the difference is less than /spl plusmn/1/spl times/10/sup -3/). From the tests of field qualities, we confirm that the magnets have good performance for electron beam storage. An electron beam of 600 MeV can be stored.<>

Keywords

accelerator magnets; electron accelerators; magnetic field measurement; storage rings; superconducting coils; superconducting device testing; superconducting magnets; 3.5 T; 600 MeV; coil axis; compact storage ring; electron beam aperture; electron beam storage; high field homogeneity; high field stability; magnetic field tests; persistent current mode; superconducting bending magnets; Apertures; Current measurement; Electron beams; Magnetic field measurement; Performance evaluation; Persistent currents; Stability; Storage rings; Superconducting magnets; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402686

Filename

402686