Field quality measurements of the LQXB inner triplet quadrupoles for LHC

Author

Velev, G.V. ; Bossert, R. ; Carcagno, R. ; DiMarco, J. ; Feher, S. ; Glass, H. ; Kashikhin, V.V. ; Kerby, J. ; Lamm, M. ; Makulski, A. ; Nobrega, A. ; Nogiec, J. ; Orris, D. ; Peterson, T. ; Rabehl, R. ; Schlabach, P. ; Strait, J. ; Sylvester, C. ; Tartag

Author_Institution

Fermilab, USA

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1102

Lastpage

1105

Abstract

As a part of the USLHC program, Fermilab is building half of the inner triplet quadrupole magnets for the LHC. Two identical quadrupoles (MQXB) with a dipole corrector between them in a single cryogenic unit (LQXB) comprise the Q2 optical element of the final focus triplets in the interaction regions. The 5.5 m long MQXB have a 70 mm aperture and operate in superfluid helium at 1.9 K with a peak field gradient of 215 T/m. Manufacturing of the 18 magnets is in an advanced stage. A program of magnetic field quality measurements of the magnets is performed at room temperature during magnet fabrication as well as at superfluid helium temperature during the cold qualification of each magnet. Results of the measurements are summarized in this paper.

Keywords

accelerator magnets; colliding beam accelerators; magnetic field measurement; proton accelerators; storage rings; superconducting magnets; synchrotrons; 1.9 K; 5.5 m; 70 mm; Fermilab; LQXB; Large Hadron Collider; Q2 optical element; USLHC program; cold qualification; cryogenic unit; dipole corrector; focus triplets; inner triplet quadrupole magnets; interaction regions; magnet fabrication; magnetic field quality measurements; superconductivity; superfluid helium temperature; Apertures; Cryogenics; Fabrication; Helium; Large Hadron Collider; Magnetic field measurement; Magnets; Manufacturing; Performance evaluation; Temperature; Magnetic fields; quadrupole; superconductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849505

Filename

1439834