Status of the 16 T Dipole Development Program for a Future Hadron Collider

Tommasini, D.; Arbelaez, Diego; Auchmann, Bernhard; Bajas, Hugues; Bajko, M.; Ballarino, A.; Barzi, E.; Bellomo, G.; Benedikt, Michael; Bermúdez, Susana Izquierdo; Bordini, B.; Bottura, L.; Brower, Lucas; Buzio, Marco; Caiffi, B.; Caspi, S.; Dhallé, M.; Durante, M.; Derijk, G.; Fabbricatore, P.; Farinon, S.; Ferracin, P.; Gao, Peng; Gourlay, S.A.; Juchno, M.; Kashikhin, V.V.; Lackner, F.; Lorin, C.; Marchevsky, M.; Marinozzi, Vittorio; Martı́nez, T.; Munilla, Javier; Novitski, I.; Ogitsu, T.; Ortwein, Rafal; Pérez, Juan Carlos; Petrone, Carlo; Prestemon, S.; Prioli, Marco; Rifflet, J. M.; Rochepault, Etienne; Russenschuck, Stephan; Salmi, Tiina; Savary, F.; Schoerling, Daniel; Segreti, M.; Senatore, Carmine; Sorbi, M.; Stenvall, Antti; Todesco, E.; Toral, Fernando; Verweij, Arjan; Wessel, S.; Wolf, Felix; Zlobin, A.V.

doi:10.1109/tasc.2017.2780045

Cited by 40 publications

(29 citation statements)

References 12 publications

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“…The design and protection of the FCC-hh dipole circuits is an important part of the 16-T development program [1] because the energy stored in the magnets and the length of the sectors composing the 100 km tunnel are much higher than those in present accelerators. Table I shows the nominal current and stored energy for the four options presently considered for the dipole magnets [1] and for the LHC main bending (MB) magnets. The cos-θ magnet, selected as the baseline FCC-hh dipole design, has a nominal current similar to the LHC MB magnet but approximately five times higher stored energy.…”

Section: A Critical Protection Aspectsmentioning

confidence: 99%

“…T HE quench protection of superconducting dipole magnets of the Future Circular Collider (FCC-hh) was integrated into the 16-T development program [1]. The adopted protection criterion is that the maximum voltage-to-ground and hot-spot temperature developed in the magnet coils in the case of a quench must be below safe limits [1]. The voltage-to-ground depends on the layout of the circuit employed to feed the magnets.…”

Section: Introductionmentioning

confidence: 99%

“…During the FPA phase, the circuit shows the highest voltagesto-ground. In particular, the maximum voltage drop from the magnet coils to ground is composed of two contributions V magnet,gnd = V magnet,circuit + V circuit,gnd (1) where V magnet,circuit is the voltage drop from the magnet coils to the input current lead connecting the magnet to the rest of the circuit (nodes kin, with k = 1, . .…”

Section: Introductionmentioning

confidence: 99%

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Conceptual Design of the FCC-hh Dipole Circuits With Integrated CLIQ Protection System

Prioli¹,

Auchmann²,

Bortot³

et al. 2019

IEEE Trans. Appl. Supercond.

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The Future Circular Collider (FCC-hh) project is a conceptual study whose goal is to design the successor of the Large Hadron Collider, increasing the collision energy from 14 to 100 TeV. The energy stored in the 16-T superconducting dipole magnets and the length of the sectors composing the 100-km FCC tunnel are considerably larger than those in present accelerators. This means that the energy stored in the FCC-hh dipole circuit is likely to be much higher than that in existing superconducting circuits. In the case of magnet quenches or faults, the circuit needs to be protected, i.e., its energy needs to be rapidly dissipated without inducing excessive voltages in the magnet chain. This article proposes a conceptual design for the FCC-hh dipole circuit, which satisfies the constraint of the maximum allowable voltage-to-ground and fulfills additional requirements related to the FCC-hh operation and tunnel layout. A compromise among the considered requirements leads to a relatively simple circuit layout and a large number of circuits for the entire machine. The behavior of the proposed circuit during the critical fast power abort phase is simulated through a numerical model, which covers the electrical circuit domain and the electrothermal magnet domain. Each FCC-hh dipole magnet is protected by means of the coupling-loss-induced quench (CLIQ) protection system, which also acts at the circuit level. The simulations predict severe voltage oscillations in the FCC-hh dipole circuits that may pose a problem for the quench detection system. The simulations also show that the severity of the oscillations is not due to the presence of CLIQ. This protection system can be integrated into the proposed circuit layout and represents an effective protection system for the entire string of FCC-hh dipole magnets.

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Section: A Critical Protection Aspectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conceptual Design of the FCC-hh Dipole Circuits With Integrated CLIQ Protection System

Prioli¹,

Auchmann²,

Bortot³

et al. 2019

IEEE Trans. Appl. Supercond.

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“…In these years, the development of the magnets for the Hi-Lumi project will for the first time demonstrate the use of Nb 3 Sn magnets in a particle accelerator. To prepare for the next step at higher fields, towards a HE-LHC or a FCC, new R&D programs are being established in the US through the US Magnet Development Program (MDP) , and in Europe through the FCC 16 T development program and the European Circular Collider (EuroCirCol) study (Schoerling et al 2015;Tommasini et al 2018). These programs are tackling the main R&D issues in preparation for the large use of high-field Nb 3 Sn magnets in a particle accelerator, from conductor development to the training performance and design options.…”

Section: Present Development Programsmentioning

confidence: 99%

Nb3Sn Accelerator Dipole Magnet Needs for a Future Circular Collider

Tommasini

2019

Nb3Sn Accelerator Magnets

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“…T HE Future-Circular-Collider (FCC) design study investigates, among many other things, feasible designs for the FCC 16-T main dipole magnet using Nb 3 Sn technology [1]. Initially, the study's magnet work package studied cosine-theta, block-coil, and common-coil type magnets in the framework of the European Circular Energy-Frontier Collider Study (EuroCirCol) H2020 project [2].…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Design of a 16-T CCT Twin-Aperture Dipole for FCC

Auchmann

Brouwer

Caspi

et al. 2018

IEEE Trans. Appl. Supercond.

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Abstract-Canted-cosine-theta (CCT) technology has been studied for its suitability for a future-circular-collider (FCC) main dipole in terms of magnetic and mechanical performance, electrothermal protectability, as well as efficiency. In this paper, we present lessons learnt from our search for efficient CCT solutions by means of two-dimensional (2-D) magnetic and mechanical simulations, discuss the 3-D periodic mechanical model, as well as 3-D electromagnetic analysis of the end regions. Temperature and voltage distributions during a quench under simplifying assumptions are discussed, and the magnet's efficiency is compared to that of other contenders in the FCC design study. The results qualify the CCT design as a contender for the FCC main dipole.

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Status of the 16 T Dipole Development Program for a Future Hadron Collider

Cited by 40 publications

References 12 publications

Conceptual Design of the FCC-hh Dipole Circuits With Integrated CLIQ Protection System

Conceptual Design of the FCC-hh Dipole Circuits With Integrated CLIQ Protection System

Nb3Sn Accelerator Dipole Magnet Needs for a Future Circular Collider

Electromechanical Design of a 16-T CCT Twin-Aperture Dipole for FCC

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