162 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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Fabrication and test of LARP technological quadrupole models of TQC series
In support of the development of a large-aperture Nb3Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, several two-layer technological quadrupole models of TQC series with 90 mm aperture and collar-based mechanical structure have been developed at Fermilab in collaboration with LBNL. This paper summarizes the results of fabrication and test of TQC02a, the second TQC model based on RRP Nb3Sn strand, and TQC02b, built with both MJR and RRP strand. The test results presented 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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Development and test of LARP technological quadrupole (TQC) magnet
In support of the development of a large-aperture Nb{sub 3}Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer quadrupole models (TQC and TQS) with 90-mm aperture are being constructed at Fermilab and LBNL within the framework of the US LHC Accelerator Research Program (LARP). This paper describes the construction and test of model TQC01. ANSYS calculations of the structure are compared with measurements during construction. Fabrication experience is described and in-process measurements are reported. Test results at 4.5K are presented, including magnet training, current ramp rate studies and magnet quench current . Results of magnetic measurements at helium temperature are also presented
Quench Protection Study of a Single-Aperture 11 T Nb3Sn Demonstrator Dipole for LHC Upgrades
The planned upgrade of the Large Hadron Collider (LHC) collimation system will include installation of additional collimators in the dispersion suppressor areas. The longitudinal space for the collimators could be provided by replacing 15-m-long 8.33 T NbTi LHC main dipoles with shorter 11 T Nb 3Sn dipoles compatible with the LHC lattice and main systems. FNAL and CERN have started a joint program with the goal of building a 5.5-m-long twin-aperture Nb3Sn dipole prototype suitable for installation in the LHC. The first step of this program is the development of a 2-m-long single-aperture demonstrator dipole with a nominal field of 11 T at the LHC nominal current of 11.85 kA. This paper summarizes the results of quench protection studies of 11 T dipoles performed using the single-aperture Nb 3Sn demonstrator
Field quality of quadrupole R&D models for the LHC IR
Superconducting quadrupole magnets operating in superfluid helium at 1.9 K, with 70 mm bore and nominal field gradient of 205 T/m at collision optics, are being developed by the US LHC Accelerator Project for the Interaction Regions of the Large Hadron Collider (LHC). A magnet model program to validate and optimize the design is underway. This paper reports results of field quality measurements of four model magnets. (3 refs)
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