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Mechanical Qualification of the Support Structure for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC

Document #:
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Submitted by:
Giorgio Ambrosio
Updated by:
Giorgio Ambrosio
Document Created:
23 Dec 2015, 16:49
Contents Revised:
01 Mar 2016, 12:19
DB Info Revised:
01 Mar 2016, 12:19
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23 Dec 2015, 16:49
Within the scope of the High Luminosity LHC project, the collaboration between CERN and U.S. LARP is developing new low-beta quadrupoles using the Nb3Sn superconducting technology for the upgrade of the LHC interaction regions. The magnet support structure of the first short model was designed and two units were fabricated and tested at CERN and at LBNL. The structure provides the preload to the collars-coils subassembly by an arrangement of outer aluminum shells pre-tensioned with water-pressurized bladders.
For the mechanical qualification of the structure and the
assembly procedure, superconducting coils were replaced with
solid aluminum “dummy coil”, the structure was preloaded at
room temperature, and then cooled-down to 77 K. Mechanical
behavior of the magnet structure was monitored with the use of strain gauges installed on the aluminum shells, the dummy coils and the axial preload system. This paper reports on the outcome of the assembly and the cool-down tests with dummy coils, which were performed at CERN and at LBNL, and presents the strain gauge measurements compared to the 3D finite element model predictions.
Files in Document:
  • pdf (Mariusz_MT24-3PoBA-04 Mechanical Qualification of the ...pdf, 2.2 MB)
Associated with Events:
MT24 held from 18 Oct 2015 to 23 Oct 2015 in Seoul, Korea
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