EuroCirCol 16 T Block-Coils Dipole Option for the Future Circular Collider

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International audienceAbstract:A key challenge for a future circular collider (FCC) with centre-of-mass energy of 100 TeV and a circumference in the range of 100 km is the development of high-field superconducting accelerator magnets, capable of providing a 16 T dipolar field of accelerator quality in a 50 mm aperture. This paper summarizes the strategy and actions being undertaken in the framework of the FCC 16 T Magnet Technology Program and the Work Package 5 of the EuroCirCol

Section: Wp5 Of Eurocircolmentioning

confidence: 99%

The 16 T Dipole Development Program for FCC

Tommasini¹,

Auchmann²,

Bajas³

et al. 2017

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“…Alternatively, the 16-T magnets could be used for a High Energy upgrade of the Large Hadron Collider (HE-LHC), which would increase the collision energy from 14 TeV to 27 TeV. The EuroCirCol Collaboration studied different designs [19][20][21][22][23][24][25][26][27][28][29][30][31][32] for the 16-T superconducting dipoles and chose as baseline the cos θ layout [21,32], whose coil cross-section is left-right asymmetric, because in the cold mass size constraint the elevate magnetic field leads to a strong cross-talk, which can be controlled only by an asymmetric coil winding.…”

Section: Introductionmentioning

confidence: 99%

A Method for Minimizing the Magnetic Cross Talk in Twin-Aperture $\cos \theta$ Superconducting Dipoles

Ricci

Fabbricatore

2020

We present an analytic method to minimize the magnetic cross-talk in twin-aperture cos θ dipoles. In the single-aperture cos θ layout, the coil design can be performed with an analytic approach, based on a sector coil approximation. This method allows a fast evaluation of the field harmonics and an almost exhaustive scan on the positions and dimensions of the sectors, for coil layouts made of a different number of sectors. This increases the probabilities to find the coil shape which best fits the specifications. In a twin-aperture arrangement, the magnetic cross-talk can be not negligible and, to the aim of an analytic minimization of the unwanted multipoles, an extension of the single-aperture sector model is required. This is the case of the recombination dipole D2 for the High Luminosity LHC and of the 16-T bending dipole for the Future Circular Collider (FCC). This analytical method has been used to find alternative coil designs for both dipoles.

“…One of the actors involved is EuroCirCol, the European Circular energy-frontier Collider study, whose work package 5 is dedicated to the design of 16 Tesla Nb 3 Sn superconducting dipole magnets [2], [3]. Three different options were originally taken into consideration for the magnet design, namely, the cos-θ [4], block coil [5], and common coil [6] type cross sections. Later, a canted cos-θ magnet [7] was added as the fourth option.…”

Section: Introductionmentioning

confidence: 99%

The CLIQ Quench Protection System Applied to the 16 T FCC-hh Dipole Magnets

Prioli

Segreti

Fernandez

et al. 2019

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Part of the Future Circular Collider (FCC-hh) study is dedicated to the development of the 16 Tesla Nb 3 Sn superconducting dipole magnets. The design of the magnets was enabled by a cooperative effort of national research institutes, universities, and CERN. These actors tackled the problem from different sides, namely, the electromagnetic design, the mechanical design, the design of the quench protection systems, and the circuit design. The article deals with the design of the quench protection systems and provides solid motivations for the selection of the coupling-loss-induced quench (CLIQ) device as the baseline protection system for the FCC-hh main dipole magnets. The article shows that the design domains mentioned above are tightly interconnected and, therefore, the simulation of a quench event involves a complex multiphysics problem. The STEAM cosimulation framework, recently developed at CERN, is applied to address the complexity. The STEAM-SIGMA models are employed to simulate the CLIQ quench protection system applied to the FCC-hh dipole magnets. Dedicated CLIQ configurations are identified to protect the magnets in case of a quench. In addition, the possible implications of the CLIQ protection system on the mechanical design of the magnets are discussed. To this end, the article employs the co-simulation of different software platforms to calculate the mechanical stress during a quench. The results show that CLIQ does not produce additional stress.