WP3- MQXF Project
HL-LHC WP3 Presentation
MQXF Magnet
In order to reduce the beam size by a factor two in the inter-action points, and to increase the rate of collisionsby a factorof five, the HL-LHC Project is planning to install in the LHC Interaction Regions(IR) new inner triplet (or low-β) quadru-pole magnets, called MQXF. With respect to the current triplet quadrupole magnets, MQXF will feature a largeraper-ture, from 70 to 150mm, a higher peak field, from 8.6 to 11.4T, and a new superconducting material, Nb3Sn instead of Nb-Ti.Out of the 30 triplets magnets (including spares) that will be installed in the HL-LHC, 20 magnets, called MQXFA and 4.2m long, will be fabricated by the US Accelerator Research Program (AUP), a continuation of the LARPProgram.
The remaining 10 magnets, called MQXFB and 7.15m long, will be fabricated by CERN. Both MQXFA and MQXFB, which have identical cross-sections and 3D design,will have to produce at a nominal gradient of 132.6 T. The fabrication of the so-called “series magnets”, i.e. the ones to be installed in the machine, will start in 2019, and it was preceded by the devel-opment of short model magnets, 1.5 m long, and full-length pro-totypes,constructed and tested to characterized magnet perfor-mance. At the time of the submission of this paper, 4short mod-els (MQXFS1-3-5-4)and 2 MQXFA prototypes(MQXFAP1-2) have been tested,while the first MQXFB prototype(MQXFBP1) is being assembled. In addition, two single-coiltests, called MQXFSM1 and MQXFAM1 for the short and longcoils, have been carried out. We provide here a description ofthe conductor and coils used in the different magnets, the pre-loading conditions, and a summary of the quench performance.
LMF ACTIVITIES
PRESENTATION OF THE TE-MSC-LMF SECTION
As part of CERN, the TE-MSC-LMF section has the following roles:
● The manufacture, maintenance and technical support of the accelerator's superconducting magnets,
● The installation, commissioning and operation of the LHC Magnet Large Facility.
● The definition, manufacture and maintenance of busbars, electrical connections and interconnections,
● The installation, maintenance and operation of the coil zone,
● The development of tools for new projects and their supplies,
● Storage and logistics management of stores, cold masses as well as cryostatized magnets.
Quality Policy :
The complexity of the elements manufactured within the TE-MSC-LMF section requires the implementation of a quality management system. In addition, the difficulty of implementing corrective or curative actions on the elements installed in the LHC requires special attention to the quality of the products and the training of technicians.