Magnetic Field Measurement of 2-m-Long Model of Beam Separation Dipole for the HL-LHC Upgrade
S. EnomotoM. SuganoT. NakamotoNaoki OkadaHiroshi KawamataK. SasakiKen‐ichi TanakaH. OhhataM. IidaRyutaro OkadaNaoto TakahashiShigekatu SugawaraN. HigashiT. OgitsuNobuhiro KimuraAndrea MussoE. Todesco
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Abstract:
KEK has been developing a beam separation dipole magnet for the high luminosity large hadron collider upgrade. The magnet has a coil aperture of 150 mm and uses NbTi superconducting cable. A dipole magnetic field of 5.6 T is generated at 12 kA at 1.9 K to provide a field integral of 35 T·m. KEK has started the development of the first 2-m-long model magnet to evaluate the design and performance of the beam separation dipole magnet. The excitation test at 1.9 K of the first 2-m-long model magnet was performed from April to June 2016 at KEK. This paper presents the results of the magnetic field measurements of the first 2-m-long model magnet by a rotating coil probe.Keywords:
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The High Energy Accelerator Research Organization (KEK) has been developing the beam separation dipole magnet for the High Luminosity Large Hadron Collider (HL-LHC) upgrade. The magnet has a coil aperture of 150 mm, using Nb-Ti superconducting cable, and a dipole magnetic field of 5.6 T will be generated at 12 kA, at 1.9 K, to provide the field integral of 35 T·m. To verify the mechanical behavior of the magnet and to optimize the fabrication processes, we develop a 200-mm short model, which is the cross-sectional cutout of the magnet. The development includes validation of a series of fabrication processes. Coil stress in pole was monitored by strain gauges during collaring, yoking, and cooldown test.
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