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Description
The test facility dipole magnet (TFD) is being developed at the Lawrence Berkeley National Laboratory (LBNL). This is a large-bore Nb$_3$Sn dipole magnet to be at the center of the High Field Vertical Magnet Test Facility (HFVMTF), funded by the U.S. Department of Energy (DOE) Office of Science (SC), and designed to test advanced cables and inserts in a high transverse background field and in a wide range of temperatures. The magnet is designed as a block-type magnet, using flared end coils, a support structure based on the bladder and key concept, and an external aluminum shell. During the powering of the magnet, steel rods and endplates provide axial support to the coils. The TFD is designed to create a field of 15 T at 1.9 K in a quasi-rectangular 100 x 150 mm bore.
This paper presents the progress of the development, design, and fabrication of the coils and magnet structure, including the tooling regarding winding, reaction, and impregnation of the coils, and reporting on the progress of the production of the first full-scale prototype coil, and the assembly of the magnet structure.
This work was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, through the US Magnet Development Program under contract No. DE-AC02-05CH11231.
