On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet

Troitino, Jose Ferradas; Ambrosio, G.; Bajas, H.; Brouwer, Lucas; Ferracin, P.; Bermúdez, Susana Izquierdo; Lorenzo, Jose; Mangiarotti, Franco; Pérez, Juan Carlos; Ravaioli, Emmanuele; Taakala, E. Tapani; Vallone, Giorgio; Senatore, Carmine

doi:10.1016/j.cryogenics.2020.103054

Cited by 3 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [50], we initially presented the creation of the ANSYS code capable of reproducing the 3D quench propagation in superconducting magnets. In [42], the model capabilities were expanded to introduce the simulation of the complete quench discharge, including the modeling of the most relevant transitory effects [70,71]. The main characteristics of the computation [72] are:…”

Section: Model Descriptionmentioning

confidence: 99%

“…In [42], the model capabilities were expanded to introduce the simulation of the complete quench discharge, including the modeling of the most relevant transitory effects [70,71]. The main characteristics of the computation [72] are:…”

Section: Model Descriptionmentioning

confidence: 99%

“…• The most relevant dynamic effects for a QH protected magnet are included as a power input, i.e. inter-filament coupling losses [42,71]. • When applicable, the material properties are updated as function of the magnetic field and temperature.…”

Section: Model Descriptionmentioning

confidence: 99%

“…With the objective of closing this gap, two-dimensional research works have been published in [38][39][40][41][42]. Though, a full understanding of the magnet mechanics during a quench can be only obtained by means of a three-dimensional analysis, as follows straightforwardly from the 3D nature of quench phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…On first instance, a 3D numerical model reproducing the quench propagation [47,48] and the magnet quench discharge has been developed using ANSYS APDL [49]. This model, which is carefully described in [42,50], has been validated using a large amount of experimental signals recorded during real tests. In a next step, we profit from the output of this computation to transfer the necessary thermal and electro-magnetic loads (with the help of a standard electro-magnetic calculation) to the magnet mechanical model, also built in ANSYS APDL.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench

Troitino

Bajas

Bianchi

et al. 2021

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The fast thermal and electromagnetic transients that occur in a superconducting magnet in case of a quench have the potential of generating large mechanical stresses both in the superconducting coils and in the magnet structure. While the investigation of such quench loads should generally be conducted to ensure a safe operation of the system, its importance is greatly enlarged in the case of high-field magnets based on strain sensitive superconductors. For these, a rigorous analysis of the magnet mechanics during a quench becomes critical. The scope of this work is hence to bring, for the first time, a detailed understanding of the three-dimensional mechanical behavior of a Nb 3 Sn accelerator magnet during a quench discharge. The study relies on the use of finite element models, where various multi-domain simulations are employed together to solve the coupled physics of the problem. Our analysis elaborates on the case study of the new MQXF quadrupole magnet, currently being developed for the high-luminosity upgrade of the LHC. Notably, we could find a very good agreement between the results of the simulation and experimental data from full-scale magnet tests. The validated model confirms the appearance of new peak stresses in the superconducting coils. An increase in the most relevant transverse coil stresses of 20-40 MPa with respect to the values after magnet cool-down has been found for the examined case.

show abstract

Section: Model Descriptionmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench

Troitino

Bajas

Bianchi

et al. 2021

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Damage behavior of Nb3Sn/Cu superconducting strand at room temperature under asymmetric strain cycling

Jiang

Shen

et al. 2021

Fusion Engineering and Design

View full text Add to dashboard Cite

CLIQ Protection Design for the Graded Nb$_{3}$Sn Research Racetrack Dipole Demonstrator (R2D2)

Liu

Salmi

Calvelli

et al. 2023

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The Research Racetrack Dipole Demonstrator (R2D2) is being studied as a demonstrating magnet for future FCC magnets. The R2D2 is meant to prove the feasibility of grading in block-coil Nb 3 Sn dipoles and explore quench behaviors at a very high current. This short model provides an opportunity to study quench protection concepts which will be needed for the full-scale FCC magnets. Both quench heaters and CLIQ (coupling loss induced quench) are under study. This paper presents the research work on the CLIQ protection. The work includes CLIQ design methods and configurations, and comparative studies of various CLIQ configurations for maximizing the CLIQ effectiveness. The results show that the most effective CLIQ configuration is able to quench 80% of the coil turns at the nominal current within 3 ms, leaving 20 ms for detection and validation time while keeping the maximum hotspot temperature within 350 K. The study shows that protection of R2D2 using only CLIQ may be feasible under certain assumptions.

show abstract

On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet

Cited by 3 publications

References 18 publications

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench

Damage behavior of Nb3Sn/Cu superconducting strand at room temperature under asymmetric strain cycling

CLIQ Protection Design for the Graded Nb$_{3}$Sn Research Racetrack Dipole Demonstrator (R2D2)

Contact Info

Product

Resources

About

On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet

Cited by 3 publications

References 18 publications

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb3Sn superconducting accelerator magnet during a quench

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb3Sn superconducting accelerator magnet during a quench

Damage behavior of Nb3Sn/Cu superconducting strand at room temperature under asymmetric strain cycling

CLIQ Protection Design for the Graded Nb$_{3}$Sn Research Racetrack Dipole Demonstrator (R2D2)

Contact Info

Product

Resources

About

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench

A methodology for the analysis of the three-dimensional mechanical behavior of a Nb₃Sn superconducting accelerator magnet during a quench