Model Magnet Development of D1 Beam Separation Dipole for the HL-LHC Upgrade

Nakamoto, T.; Sugano, M.; Xu, Qingjin; Kawamata, Hiroshi; Enomoto, S.; Higashi, N.; Idesaki, Akira; M, Iio; Ikemoto, Y.; Iwasaki, R.; Kimura, N.; Ogitsu, T.; Okada, Naoki; Sasaki, Κ.; Yoshida, Makoto; Todesco, E.

doi:10.1109/tasc.2014.2361404

Cited by 28 publications

(15 citation statements)

References 8 publications

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“…The large QXF aperture influences the aperture and parameters of the separation and recombination dipoles [53]. The present 60 mm aperture normal D1 dipoles have to be replaced with 150 mm aperture superconducting D1 dipoles operating at 78% of the conductor limit [81]. The D1 with appropriate shielding will decrease the distance between the D1 and D2 magnets to accommodate longer triplets and crab cavities.…”

Section: ) Ir Magnet Development In Progress A) Ir Magnets For the Hmentioning

confidence: 99%

Superconducting Magnets for Particle Accelerators

Rossi

Bottura

2013

Reviews of Accelerator Science and Technology

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Superconductivity has been the most influential technology in the field of accelerators in the last 30 years. Since the commissioning of the Tevatron, which demonstrated the use and operability of superconductivity on a large scale, superconducting magnets and rf cavities have been at the heart of all new large accelerators. Superconducting magnets have been the invariable choice for large colliders, as well as cyclotrons and large synchrotrons. In spite of the long history of success, superconductivity remains a difficult technology, requires adequate R&D and suitable preparation, and has a relatively high cost. Hence, it is not surprising that the development has also been marked by a few setbacks.This article is a review of the main superconducting accelerator magnet projects; it highlights the main characteristics and main achievements, and gives a perspective on the development of superconducting magnets for the future generation of very high energy colliders.To be published in Reviews of Accelerator Science and Technology, Vol. 5Geneva, Switzerland CERN-ATS-2013-019February 2013 Superconductivity has been the most influential technology in the field of accelerators in the last 30 years. Since the commissioning of the Tevatron, which demonstrated the use and operability of superconductivity on a large scale, superconducting magnets and rf cavities have been at the heart of all new large accelerators. Superconducting magnets have been the invariable choice for large colliders, as well as cyclotrons and large synchrotrons. In spite of the long history of success, superconductivity remains a difficult technology, requires adequate R&D and suitable preparation, and has a relatively high cost. Hence, it is not surprising that the development has also been marked by a few setbacks. This article is a review of the main superconducting accelerator magnet projects; it highlights the main characteristics and main achievements, and gives a perspective on the development of superconducting magnets for the future generation of very high energy colliders.

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Section: ) Ir Magnet Development In Progress A) Ir Magnets For the Hmentioning

confidence: 99%

Superconducting Magnets for Particle Accelerators

Rossi

Bottura

2013

Reviews of Accelerator Science and Technology

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“…The field element's geometry is the single aperture D1 dipole magnet, which is designed for the high luminosity upgrade of the Large Hadron Collider (LHC). For more details about its properties and geometry see [163]. In [8], only the magnethothermal PDE is solved on the D1 dipole magnet.…”

Section: Optimised Co-simulation Of Field-circuit Systemsmentioning

confidence: 99%

“…Homogeneous Dirichlet boundary conditions are set on the outer boundary and homogeneous Neumann BC are set at the symmetry axis (see (2.21)). The rest of the properties such as for example the nonlinear material laws (ν, τ eq ) are given in [163], [164]. For the spatial discretisation of the magnetothermal PDE (5.2) the finite element method is applied with nodal elements of first order for the thermal and second order for the magnetic equations.…”

Section: Optimised Co-simulation Of Field-circuit Systemsmentioning

confidence: 99%

Mathematical Analysis and Simulation of Field Models in Accelerator Circuits

Garcia¹

2021

Springer Theses

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“…Resistive D1 separation dipoles are being replaced by superconducting 5.6 T, single layer Nb-Ti magnets with 150 mm aperture [4]. The design study and development of the 2.2 m short model is currently ongoing in collaboration between CERN and KEK.…”

Section: Introductionmentioning

confidence: 99%

Influence of 3-D Effects on Field Quality in the Straight Part of Accelerator Magnets for the High-Luminosity Large Hadron Collider

Nilsson

Bermúdez

Todesco

et al. 2018

IEEE Trans. Appl. Supercond.

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Abstract-A dedicated D1 beam separation dipole is currently being developed at KEK for the Large Hadron Collider Luminosity upgrade (HL-LHC). Four 150 mm aperture, 5.6 T magnetic field and 6.7 m long Nb-Ti magnets will replace resistive D1 dipoles. The development includes fabrication and testing of 2.2 m model magnets. The dipole has a single layer coil and thin spacers between coil and iron, giving a non-negligible impact of saturation on field quality at nominal field. The magnetic design of the straight section coil cross section is based on 2D optimization and a separate optimization concerns the coil ends. However, magnetic measurements of the short model showed a large difference (tens of units) between the sextupole harmonic in the straight part and the 2D calculation. This difference is correctly modelled only by a 3D analysis: 3D calculations show that the magnetic field quality in the straight part is influenced by the coil ends, even for the 6.7 m long magnets. The effect is even more remarkable in the short model. We investigate similar 3D effects for other magnets, namely the 11 T dipole for HL-LHC. We also consider the case of the 4.5 T recombination magnets for HL-LHC (D2), where the larger space between coil and iron makes this effect less important, but still visible. We conclude the paper by outlining the different classes of accelerator magnets where this coupling between 3D effects and iron saturation can be relevant. Index Terms-Superconducting magnets, accelerator magnets, magnetic analysis.

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Model Magnet Development of D1 Beam Separation Dipole for the HL-LHC Upgrade

Cited by 28 publications

References 8 publications

Superconducting Magnets for Particle Accelerators

Superconducting Magnets for Particle Accelerators

Mathematical Analysis and Simulation of Field Models in Accelerator Circuits

Influence of 3-D Effects on Field Quality in the Straight Part of Accelerator Magnets for the High-Luminosity Large Hadron Collider

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