1. Magnetic Measurements of HL-LHC AUP Cryo-Assemblies at Fermilab
- Author
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DiMarco, J., Akella, P., Ambrosio, G., Assell, D., Baldini, M., Chlachidze, G., Feher, S., Nogiec, J., Nikolic, V., Stoynev, S., Strauss, T., Tartaglia, M., Thompson, P., Walbridge, D., Ghiorso, W., and Wang, X.
- Subjects
Physics - Accelerator Physics - Abstract
LQXFA/B production series cryogenic assemblies are being built for the LHC upgrade by the HL-LHC Accelerator Upgrade Project (AUP). These contain a pair of MQXFA quadrupole magnets combined as a cold mass within a vacuum vessel, and are to be installed in the IR regions of the LHC. The LQXFA/B are being tested at 1.9 K to assess alignment and magnetic performance at Fermilab's horizontal test facility. The ~10 m - long assembly must meet stringent specifications for quadrupole strength and harmonic field integrals determination, magnetic axis location, and for variations in axis position and local field profile. A multi-probe, PCB-based rotating coil and Single Stretched Wire system are employed for these measurements. To accurately determine rotating coil location and angles within the cold mass, a laser tracker is utilized to record multiple targets at one end of the probe. This paper describes the measurements, probes/equipment, and techniques used to perform the necessary characterization of the cold mass., Comment: 27th Intl Conf on Magnet Technology (MT27)
- Published
- 2021
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