Field measurement of superconducting quadrupole magnets for TRISTAN mini-beta insertions

Author

Egawa, K. ; Endo, K. ; Kubo, T. ; Morita, Y. ; Ohsawa, Y. ; Ohuchi, N. ; Ozaki, T. ; Sugahara, R. ; Tsuchiya, K.

Author_Institution

KEK, Nat. Lab. for High Energy Phys., Ibarak, Japan

fYear

1991

fDate

6-9 May 1991

Firstpage

2462

Abstract

Eight superconducting quadrupole magnets for TRISTAN minibeta insertions (QCS) have been measured by the rotating coil method before installation in the TRISTAN electron-positron colliding ring. Following the alignment of the magnet to the measuring system by use of a movable QCS-support, harmonics and field gradients were measured as functions of current and the median plane was determined for each magnet. Details of the measuring systems and results of the measurements are presented. The results of the field measurements show that the relative errors of the integral field gradient can be kept within +or-0.001 for all the magnets and that the higher multipole components are small enough for the tolerance required to the QCS.<>

Keywords

cavity resonators; electron accelerators; storage rings; superconducting devices; TRISTAN minibeta insertions; electron-positron colliding ring; field gradients; harmonics; rotating coil method; superconducting RF cavities; superconducting quadrupole magnets; Current measurement; Energy measurement; Magnetic field measurement; Performance evaluation; Persistent currents; Rotation measurement; Superconducting coils; Superconducting magnets; Transfer functions; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0135-8

Type

conf

DOI

10.1109/PAC.1991.165000

Filename

165000