Impacts of the Embedded Windings to the Field Quality of Dipole

Author

He, Y. ; Ma, L.Z. ; Han, S.F. ; Xiong, H. ; Yuan, P. ; Zhang, B. ; Liu, W.J. ; Xia, J.W.

Author_Institution

Inst. of Modern Phys., Lanzhou

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1378

Lastpage

1381

Abstract

Cooler Storage Ring (CSR) of Heavy Ion Research Facility in Lanzhou (HIRFL) consists of a main ring (CSRm) and an experimental ring (CSRe). Two particular C-type dipoles with embedded windings are used in the injection beam line of CSRm. They also act as the prototype dipoles of CSRe. The windings are designed to improve the field quality by their trimming current. The current impacts on field homogeneity and multipole components are investigated by a hall sensor and a long coil, respectively. The experiment shows that a field homogeneity of plusmn1.0times10^-3 can be reached by adjusting the trimming currents, though the multipole components change correspondingly. In our case, the quadrupole component is decreased to a low level with the octupole, decapole and 12-pole ones increased slightly when the trimming current is optimized

Keywords

accelerator magnets; magnetic field measurement; particle beam injection; storage rings; windings; C-type dipoles; CSR; Heavy Ion Research Facility; accelerator magnet; cooler storage ring; embedded windings; field homogeneity; field quality; hall sensor; injection beam line; magnetic measurement; multipole components; prototype dipoles; quadrupole component; trimming current; Coils; Helium; Magnetic cores; Magnetic field measurement; Magnetic flux; Magnetic variables measurement; Particle beam optics; Physics; Prototypes; Storage rings; Accelerator magnet; magnetic measurement;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.869555

Filename

1643109