179 research outputs found
Conceptual designs of dipole magnet for muon collider ring
Conceptual designs of a superconducting dipole magnet for a Storage Ring of a
Muon Collider with a 1.5 TeV center of mass (c.o.m.) energy and an average
luminosity of 10 34 cm-2s-1 are presented. In contrast to proton machines, the
dipoles for the Muon Collider should be able to handle ~0.5 kW/m of dynamic
heat load from the muon beam decays. The magnets are based on Nb3Sn
superconductor and designed to provide an operating field of 10 T in the 20-mm
aperture with the critical current margin required for reliable machine
operation. The magnet cross-sections were optimized to achieve the best
possible field quality in the aperture occupied by beams. The developed
mechanical structures provide adequate coil prestress and support at the
maximum level of Lorentz forces in the coil. Magnet parameters are reported and
compared with the requirements.Comment: 4 pp. Applied Superconductivity Conference (ASC 2010), 1-6 Aug 2010:
Washington, D.
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Superconducting magnet system for muon beam cooling
A helical cooling channel has been proposed to quickly reduce the six-dimensional phase space of muon beams for muon colliders, neutrino factories, and intense muon sources. A novel superconducting magnet system for a muon beam cooling experiment is being designed at Fermilab. The inner volume of the cooling channel is filled with liquid helium where passing muon beam can be decelerated and cooled in a process of ionization energy loss. The magnet parameters are optimized to match the momentum of the beam as it slows down. The results of 3D magnetic analysis for two designs of magnet system, mechanical and quench protection considerations are discussed
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Magnetic mirror structure for testing shell-type quadrupole coils
This paper presents magnetic and mechanical designs and analyses of the quadrupole mirror structure to test single shell-type quadrupole coils. Several quadrupole coils made of different Nb{sub 3}Sn strands, cable insulation and pole materials were tested using this structure at 4.5 and 1.9 K. The coils were instrumented with voltage taps, spot heaters, temperature sensors and strain gauges to study their mechanical and thermal properties and quench performance. The results of the quadrupole mirror model assembly and test are reported and discussed
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Development of Nb3Sn 11 T single aperture demonstrator dipole for LHC upgrades
The LHC collimation upgrade foresees additional collimators installed in dispersion suppressor regions. To obtain the necessary space for the collimators, a solution based on the substitution of LHC main dipoles for stronger dipoles is being considered. CERN and FNAL have started a joint program to demonstrate the feasibility of Nb{sub 3}Sn technology for this purpose. The goal of the first phase is the design and construction of a 2-m long single-aperture demonstrator magnet with a nominal field of 11 T at 11.85 kA with 20% margin. This paper describes the magnetic and mechanical design of the demonstrator magnet and summarizes its design parameters
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Fabrication and test of 4m long Nb3Sn quadrupole coil made of RRP-114-127 strand
Fermilab is collaborating with LBNL and BNL (US-LARP collaboration) to develop a large-aperture Nb{sub 3}Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade. Several two-layer quadrupole models of the 1-meter and 3.4-meter length with 90mm apertures have been fabricated and tested by the US-LARP collaboration. High-Jc RRP-54/61 strand was used for nearly all models. Large flux jumps typical for this strand due to the large sub-element diameter limited magnet quench performance at temperatures below 2.5-3K. This paper summarizes the fabrication and test by Fermilab of LQM01, a long quadrupole coil test structure (quadrupole mirror) with the first 3.4m quadrupole coil made of more stable RRP-114/127 strand. The coil and structure are fully instrumented with voltage taps, full bridge strain gauges and strip heaters to monitor preload, thermal properties and quench behavior. Measurements during fabrication are reported, including preload during the yoke welding process. Testing is done at 4.5K, 1.9K and a range of intermediate temperatures. The test results include magnet strain and quench performance during training, as well as quench studies of current ramp rate and temperature dependence from 1.9K to 4.5K
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