Magnetic Field Measurements of First Pre-series Full-Length 4.2 m Quadrupole MQXFA03 Using PCB Rotating Coils for the Hi-Lumi LHC Project
نویسندگان
چکیده
The U.S. Hi-Lumi LHC Accelerator Upgrade Project (AUP) and CERN have joined efforts to develop high field quadrupoles for the upgrade. US national laboratories in AUP project will deliver 10 magnets each cryostat has two 4.2 m gradient it. These are made of Nb3Sn conductors, with large aperture (150 mm) integrated 556.9 T. This paper reports on magnetic measurements performed during vertical test at Brookhaven National Laboratory (BNL) 2019-2020. A warm measurement Z-Scan (+/-15 A) 42 Z-positions before cool-down was BNL. results were directly compared data measured LBNL magnet assembly. Measured harmonics center offsets (ΔX ΔY) provided timely informative diagnostics structure's shape both cold temperatures. new centering fixture designed added better bore tube which contains rotating coil probe. After quench training 16.47 kA achieved, a complete set (Z-Scan I-Scan from 960 back made. Periodic axial variation allowed nonallowed observed is related radial and/or mid-plane variations along axis. Overall, average straight section within required boundaries.
منابع مشابه
Hi-lumi Lhc Collimation Studies with Merlin Code
The collimation system is key to the successful operation of the LHC. Measurements and simulations of the previous run at 4 TeV have shown that the system is ready for the next step, running at 7 TeV, but at the same time some sensitive cleaning locations have been identified. In particular the dispersion suppressors downstream of the betatron cleaning region in IR7 are sensitive to single diff...
متن کاملthe use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولthe effect of using model essays on the develpment of writing proficiency of iranina pre-intermediate efl learners
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
A System for Series Magnetic Measurements of the LHC Main Quadrupoles
More than 400 twin aperture lattice quadrupoles are needed for the Large Hadron Collider (LHC) which is under construction at CERN. The main quadrupole is assembled with correction magnets in a common cryostat called the Short Straight Section (SSS). We plan to measure all SSSs in cold conditions with an unprecedented accuracy: integrated gradient of the field within 150 ppm, harmonics in a ran...
متن کاملMagnetic Measurements of the 1 . 5 M Coils of the Anka Superconducting
A 1.5 m long superconducting undulator with a period length of 15mm is planned to be installed in ANKA end 2010 to be the light source of the new beamline NANO for high resolution X-ray diffraction. The key specifications of the system are an undulator parameter K higher than 2 (for a magnetic gap of 5mm) and a phase error smaller than 3.5 degrees. In order to characterize the magnetic field pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Applied Superconductivity
سال: 2021
ISSN: ['1558-2515', '1051-8223']
DOI: https://doi.org/10.1109/tasc.2021.3053510