Precision quadrupole magnets for the HERA luminosity upgrade

Author

Bondarchuk, E. ; Doinikov, N. ; Ivkin, V. ; Korshakov, V. ; Muratov, V. ; Peregud, V. ; Petrov, A. ; Holler, Y. ; Sinram, K. ; Willeke, F. ; Woebke, G.

Author_Institution

Efremov Inst., St. Petersburg, Russia

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

268

Lastpage

271

Abstract

The Efremov Institute and DESY have designed in collaboration high performance normal conducting quadrupole magnets for the HERA luminosity upgrade. One of the most ambitious is the type GA. It has a length of 3.85 m, a pole radius of 35 mm and must provide a maximum gradient of 26 T/m. The required field nonlinearity is /spl Delta/B/B/spl les/3/spl times/10/sup -4/ at a reference radius of 25 mm. A special feature is a clearance between the coil and the iron yoke that holds the separate electron beam pipe. This contribution deals with the production of the magnets and the results of the mechanical as well as magnetic measurements in comparison with the design values.

Keywords

accelerator magnets; electromagnets; magnetic field measurement; proton accelerators; storage rings; 3.85 m; HERA; field nonlinearity; luminosity upgrade; magnetic field measurement; mechanical measurements; quadrupole magnets; type GA magnet; Assembly; Coils; Conductors; Cooling; Electron beams; Iron; Lamination; Magnetic circuits; Magnets; Steel;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828226

Filename

828226