Field quality of two 1-m model magnets for LHC low-/spl beta/ quadrupole magnets

Author

Ohuchi, N. ; Ajima, Y. ; Qiu, M. ; Nakamoto, T. ; Ogitsu, T. ; Shintomi, T. ; Tsuchiya, K. ; Yamamoto, A.

Author_Institution

High Energy Accel. Res. Organ., Ibaraki, Japan

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

139

Lastpage

142

Abstract

Two 1-m model magnets for the LHC low-/spl beta/ quadrupoles were constructed and tested in KEK. They were energized to over 240 T/m. The field quality was measured by two harmonic coils. The multipole components were estimated along the straight section and the magnet ends. The results obtained show that the effect of the thermal cycle on the magnetic field is negligible. The time dependence of the multipole components were also measured at 420 A and it was found that b/sub 6/ changed 0.8 units over 3 hours. This paper describes the magnetic field quality of the two magnets.

Keywords

accelerator magnets; colliding beam accelerators; proton accelerators; storage rings; superconducting magnets; 420 A; LHC low-beta quadrupole magnets; harmonic coils; magnet ends; magnetic field quality; multipole components; straight section; Assembly; Coils; Conductors; Integrated circuit modeling; Integrated circuit testing; Iron; Large Hadron Collider; Magnetic field measurement; Magnetic fields; Magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828195

Filename

828195