Modeling of Longitudinal and Transverse Quench Propagation in Stacks of Superconducting ${\hbox {MgB}}_{2}$ Wire

Alessandrini, M.; Majkic, Goran; Laskaris, E.T.; Saláma, K.

doi:10.1109/tasc.2009.2019647

Cited by 10 publications

(14 citation statements)

References 6 publications

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“…The experimental data of I c (T), (T), k(T) and c p (T) here reported for tapes and stack of tapes, completed with required ones of Cu and the c p (T) of Stycast 2850FT, taken from literature [19], were used to fix the physical properties of the involved elements in each 3D model. Two different numerical finite element approaches [15] have been used to solve the 3D heat diffusion equation: FULL3D models also require data of transverse thermal conductivities of the tapes, which are estimated from their microstructure and the measured longitudinal components, and of the electric insulation layers between adjacent tape windings.…”

Section: D Numerical Models For Cu-disc/pancake-coil Setsmentioning

confidence: 99%

“…Two different numerical finite element approaches [15] have been used to solve the 3D heat diffusion equation:…”

Section: D Numerical Models For Cu-disc/pancake-coil Setsmentioning

confidence: 99%

“…To overcome these limits of Wilson's model in the analysis of quench behaviour on MgB 2 conductors and coils, one (1D), two (2D) and three (3D) dimensional numerical computational models have focused recent researches [3][4][5][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these limitations of Wilson's model in the analysis of quench behaviour on MgB 2 conductors and coils, one (1D), two (2D) and three (3D) dimensional numerical computational models have been studied in recent publications [3][4][5][14][15][16]. Nevertheless, most experimental results have been obtained on short straight conductor samples, and 1D models were applied [3][4][5] in most cases, because their length dominates other dimensions, and further experiments on systems closer to real applications [17] and corresponding 2D and 3D simulations are needed.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Pelegrin¹,

Romano²,

Martínez³

et al. 2013

Supercond. Sci. Technol.

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The study of the stability process of MgB 2 superconducting wires and coils is an important issue in the design and feasibility of electric power applications. In this sense, the thermal conductivity plays an important role, which in composite wires and tapes is mainly determined by the amount of stabilizer (usually copper), the configuration of filaments and the metallic matrix; while for coils, the winding, wire electric insulation

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Section: D Numerical Models For Cu-disc/pancake-coil Setsmentioning

confidence: 99%

“…Two different numerical finite element approaches [15] have been used to solve the 3D heat diffusion equation:…”

Section: D Numerical Models For Cu-disc/pancake-coil Setsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Pelegrin¹,

Romano²,

Martínez³

et al. 2013

Supercond. Sci. Technol.

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“…The model includes the thermal and electrical properties of the composite MgB 2 wire and epoxy, the n -value and critical current behavior of the superconductor, and the inductances of the magnet. For this simulation, the electric field criterion E c is set to 1 μ V cm −1 , and the n -value n is set to 30 [64, 72, 73]. …”

Section: Quench Simulations and Quench Protectionmentioning

confidence: 99%

Conceptual designs of conduction cooled MgB₂ magnets for 1.5 and 3.0 T full body MRI systems

Baig

Amin

Deissler

et al. 2017

Supercond. Sci. Technol.

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Conceptual designs of 1.5 and 3.0 T full-body magnetic resonance imaging (MRI) magnets using conduction cooled MgB2 superconductor are presented. The sizes, locations, and number of turns in the eight coil bundles are determined using optimization methods that minimize the amount of superconducting wire and produce magnetic fields with an inhomogeneity of less than 10 ppm over a 45 cm diameter spherical volume. MgB2 superconducting wire is assessed in terms of the transport, thermal, and mechanical properties for these magnet designs. Careful calculations of the normal zone propagation velocity and minimum quench energies provide support for the necessity of active quench protection instead of passive protection for medium temperature superconductors such as MgB2. A new ‘active’ protection scheme for medium Tc based MRI magnets is presented and simulations demonstrate that the magnet can be protected. Recent progress on persistent joints for multifilamentary MgB2 wire is presented. Finite difference calculations of the quench propagation and temperature rise during a quench conclude that active intervention is needed to reduce the temperature rise in the coil bundles and prevent damage to the superconductor. Comprehensive multiphysics and multiscale analytical and finite element analysis of the mechanical stress and strain in the MgB2 wire and epoxy for these designs are presented for the first time. From mechanical and thermal analysis of our designs we conclude there would be no damage to such a magnet during the manufacturing or operating stages, and that the magnet would survive various quench scenarios. This comprehensive set of magnet design considerations and analyses demonstrate the overall viability of 1.5 and 3.0 T MgB2 magnet designs.

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Quench Simulation

2010

Field Computation for Accelerator Magnets

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Give me four parameters and I can fit an elephant.Give me five and I can wag its tail.Attributed to C. F. Gauss, N. Bohr, Lord Kelvin, and E. Fermi, among others.Above certain limits on temperature, current density, and magnetic flux density, a superconductor undergoes a transition from the superconducting to the normal-conducting state. This process is known as a resistive transition or a quench. Superconducting accelerator magnets are usually operated close to their quench limits, either for economical reasons or because the application requires the highest achievable field. The LHC main dipoles, for example, operate at 88% on the load line. It is customary to distinguish between three different types of quenches [32]:Quench detection and magnet protection against overheating and excessive voltages during a resistive transition is an important issue in the design of superconducting magnets. It is essential to treat all involved phenomena (ther-Field Computation for Accelerator Magnets. Stephan Russenschuck

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Modeling of Longitudinal and Transverse Quench Propagation in Stacks of Superconducting ${\hbox {MgB}}_{2}$ Wire

Cited by 10 publications

References 6 publications

Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Conceptual designs of conduction cooled MgB₂ magnets for 1.5 and 3.0 T full body MRI systems

Quench Simulation

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Modeling of Longitudinal and Transverse Quench Propagation in Stacks of Superconducting ${\hbox {MgB}}_{2}$ Wire

Cited by 10 publications

References 6 publications

Experimental and numerical analysis of quench propagation on MgB2tapes and pancake coils

Experimental and numerical analysis of quench propagation on MgB2tapes and pancake coils

Conceptual designs of conduction cooled MgB2 magnets for 1.5 and 3.0 T full body MRI systems

Quench Simulation

Contact Info

Product

Resources

About

Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Experimental and numerical analysis of quench propagation on MgB₂tapes and pancake coils

Conceptual designs of conduction cooled MgB₂ magnets for 1.5 and 3.0 T full body MRI systems