Field quality measurements of the LQXB inner triplet quadrupoles for LHC

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 region...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.1102-1105
Main Authors: 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., Tartaglia, M., Tompkins, J.C., Zlobin, A.V.
Format: Article
Language:English
Subjects:
Apertures
Applied sciences
Cryogenics
Dipoles
Electrical engineering. Electrical power engineering
Electromagnets
Exact sciences and technology
Fabrication
Fluids
Helium
Large Hadron Collider
Magnetic field measurement
Magnetic fields
Magnets
Manufacturing
Performance evaluation
quadrupole
Quadrupoles
Superconductivity
Superfluidity
Temperature
Testing. Reliability. Quality control
Various equipment and components
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Summary: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.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2005.849505