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

Authors
Ohuchi, N Ajima, Y Qiu, M Nakamoto, T Ogitsu, T Shintomi, T Tsuchiya, K Yamamoto, A
Citation
N. Ohuchi et al., Field quality of two 1-m model magnets for LHC low-beta quadrupole magnets, IEEE APPL S, 10(1), 2000, pp. 139-142
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
10518223 → ACNP
Volume
10
Issue
1
Year of publication
2000
Pages
139 - 142
Database
ISI
SICI code
1051-8223(200003)10:1<139:FQOT1M>2.0.ZU;2-C
Abstract
Two l-m model magnets for the LHC low-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 alo ng 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 t ime dependence of the multipole components were also measured at 420 A and it was found that b(6) changed 0.8 units over 3 hours. This paper describes the magnetic field quality of the two magnets.