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143 results on '"Dhallé, M."'

1. AC Loss Reduction in Round HTS Cables Achieved by Low-Cost Filamentization of Tape Conductors

Author

Gömöry, F., primary, Solovyov, M., additional, Šouc, J., additional, Frolek, L., additional, Kujovič, T., additional, Seiler, E., additional, Ries, R., additional, Mošať, M., additional, Winkler, T., additional, Sugita, K., additional, Dhallé, M., additional, Krooshoop, H. J. G., additional, Hintze, C., additional, Troshyn, A., additional, Prusseit, W., additional, Nedergaard, Lars, additional, Traberg, L., additional, Christensen, J. J., additional, Jørgensen, N. O., additional, Bahl, C. R. H., additional, and Wulff, A. C., additional

Published
2024
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3. Estimation of Physical and Electrical Properties of Various REBCO Tapes for Construction of Very High Field REBCO Magnet

Author

Song, J.-S., Chaud, X., Debray, F., Paillot, K., Fazilleau, P., Lécrevisse, T., (0000-0001-6706-4541) Herrmannsdörfer, T., Senatore, C., Dhallé, M., Smara, A., Song, J.-S., Chaud, X., Debray, F., Paillot, K., Fazilleau, P., Lécrevisse, T., (0000-0001-6706-4541) Herrmannsdörfer, T., Senatore, C., Dhallé, M., and Smara, A.

Abstract

The physical and electrical properties of four recent REBCO CC were assessed: 1) THEVA; 2) Shanghai Supercond. Technology; 3) Faraday Factory Japan; and 4) Fujikura. For estimating their physical properties, the delamination strength of each tape was checked by removing a polyimide ribbon sticked on the tape and by cutting the tape after pre-tinning. Their windability and the uniformity of their thickness were also investigated through our metal-as-insulation winding process. For evaluating their electrical properties, their critical current was measured at 4.2 K under various external magnetic fields perpendicular to their ab-plane. Joint samples of each tape were fabricated and tested in a bath of liquid nitrogen at 77 K in self-field. The results are described in this paper for the four tapes.

Published
2024

4. Mechanism of enhancement of electromagnetic properties of MgB2 by nano-SiC doping

Author

Dou, S. X., Shcherbakova, O., Yeoh, W. K., Kim, J. H., Soltanian, S., Wang, X. L., Senatore, C., Flukiger, R., Dhalle, M., Husnjak, O., and Babic, E.

Subjects
Condensed Matter - Superconductivity
Abstract

A comparative study of pure, SiC, and C doped MgB2 wires has revealed that the SiC doping allowed C substitution and MgB2 formation to take place simultaneously at low temperatures. C substitution enhances Hc2, while the defects, small grain size and nanoinclusions induced by C incorporation and low temperature processing are responsible for the improvement in Jc. The irreversibility field (Hirr) for the SiC doped sample reached the benchmarking value of 10 T at 20 K, exceeding that of NbTi at 4.2 K. This dual reaction model also enables us to predict desirable dopants for enhancing the performance properties of MgB2., Comment: 15 pages, 4 figures, 1 table. accepted for publication in Physical Review Letter

Published
2007

5. Performance of the 500 kW superconducting DC and AC links of the ASCEND demonstrator at Airbus

Author

Nilsson, E., primary, Rivenc, J., additional, Rouquette, J.F., additional, Tassisto, M., additional, Fallouh, C., additional, Ybanez, L., additional, Dönges, S. A., additional, Weiss, J., additional, Radcliff, K., additional, der Laan, D. van, additional, Gacnik, D., additional, Leferink, J., additional, Otten, S., additional, Dhallé, M., additional, and ten Kate, H.J., additional

Published
2023
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12. Fundamental Electromagnetic Configuration for Generating One-Directional Magnetic Field Gradients

Author

Kosse, J.J. (author), Dhallé, M. (author), Rem, P.C. (author), ter Brake, H.J.M. (author), ten Kate, H.H.J. (author), Kosse, J.J. (author), Dhallé, M. (author), Rem, P.C. (author), ter Brake, H.J.M. (author), and ten Kate, H.H.J. (author)

Abstract

In this article, electromagnet layouts are presented, which generate a magnetic field with a magnitude gradient that does not vary significantly in a horizontal plane but decreases monotonically with the vertical height above the magnet. Such a one-direction magnetic field gradient is a specific requirement for magnetic density separation (MDS), a novel recycling technology that combines a vertical magnetic field gradient with a ferrofluid to separate a mixture of non-magnetic materials based on their mass density. We are assembling the first superconducting magnet to be used for this application. In contrast to other separation technologies that use ferrofluid, multiple products can be separated in a single process step. First, the idealized current distribution is introduced that produces such a magnetic field with a magnitude that decays only in one direction. This ideal field can be approximated with practical coil configurations, which are evaluated with a Fourier analysis to derive an optimal cross-sectional layout based on flat racetrack coils. The analysis concludes with a discussion of the effect of winding pack thickness on the value of the magnetic field above the magnet system and the peak field inside the winding pack. The conclusions of this study are applicable not just for MDS but for any application that requires a magnetic field gradient that changes only in one direction., Resources & Recycling

Published
2021
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13. Optimum Coil-System Layout for Magnet-Driven Superconducting Magnetic Density Separation

Author

Kosse, J.J. (author), Dhallé, M. (author), Tomás, G. (author), Rem, P.C. (author), ter Brake, H.J.M. (author), ten Kate, H.H.J. (author), Kosse, J.J. (author), Dhallé, M. (author), Tomás, G. (author), Rem, P.C. (author), ter Brake, H.J.M. (author), and ten Kate, H.H.J. (author)

Abstract

This article discusses the optimum layout of coils of a superconducting magnet system for magnetic density separation (MDS). MDS is a novel separation technology that combines a vertical magnetic field gradient with a ferrofluid to separate mixtures of non-magnetic particles based on their mass density. The MDS process can separate more than two types of particles in a single process step, thereby distinguishing it from other separation techniques using a ferrofluid. The authors are currently constructing a superconducting MDS demonstrator. Ideally, the gradient of the magnetic field magnitude should change only with the distance above the magnet but remain constant in a horizontal plane. In principle, such an ideal field profile can be generated with an infinite harmonic sheet current. In practice, edge effects appear due to the necessity of using a finite number of coils. These cause a horizontal component in the field gradient and also change the vertical component. We compare the vertical magnetic field gradient of various coil layouts to see which configuration performs best. To facilitate ease of production, the analysis is restricted to flat racetrack coils. The main result is that the specific shape of a racetrack coil has a larger influence on the vertical gradient than the number of coils. The feed particles need to be pushed through the separation chamber from the insertion to the collection point. One option to realize this is to use an MDS setup in which the magnet is inclined with respect to the horizontal plane. This tilting results in a horizontal magnetic force component, which drives feed particles through the fluid bed. We show that a three-coil layout provides the largest usable fluid bed depth for a wide range of tilt angles., Resources & Recycling

Published
2021
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22. SupernetNL program: 3.4 km 110 kV AC underground superconducting cable in the Dutch grid

Author

Brake, H. J. M. ter, Dhallé, M. M. J., ten Kate, H. H. J., Hunik, R., Mousavi-Gargari, S., Smit, J., Gholizad, B., Smit, J. J., and Ross, R.

Subjects
Physics, ddc:530
Abstract

TenneT, a leading European electricity transmission system operator (TSO) is planning to install a 3.4 km long underground superconducting 110 kV cable as part of the Dutch electricity grid, in the city of Enschede. HTS cables have already been demonstrated on a relatively small scale in other countries, but they are usually not part of the meshed high-voltage grid and the length of the relevant cable section generally does not exceed 1 km. In 2009, a 600-meter section of HTS cable was installed in New York, and in 2014 a 1-km long section was taken in operation in Essen, Germany to replace a 10 kV AC medium-voltage line. In the Supernet NL program, TenneT is working together with several leading knowledge institutes including University of Twente, Delft University of Technology, the Institute of Science and Sustain- able Development (IWO), HAN University of Applied Sciences and RH Marine. These institutes have been investigating control engineering aspects and the requirements the cable must meet. In the meantime, the tender process has been started which consists of two phases. In the fi rst phase (summer 2017) appropriate candidates are selected directly followed by a call for tender in August. Receipt of the best and fi nal offer is scheduled for the end of November. In the presentation, the project will be introduced and requirements will be discussed, specifi cally focusing on the cryogenic aspects.

Published
2017
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23. High temperature superconductors towards applications: at SUPRA group, Institute for Technical Physics, Karlsruhe Institute of Technology

Author

Kario, A., Kudymow, A., Kling, A., Jung, A., Grilli, F., Otten, S., Ringsdorf, B., Runtsch, B., Nast, R., Strauss, S., Walschburger, U., Willms, J., Godfrin, A., Goldacker, W., Gyuraki, R., Wu, H., Schlachter, S. I., Vojenciak, M., van der Laan, D., Rutt, A., Usoskin A.., Senatore, C., Barth, C., Bonura, M., Yang, Y., Stenvall, A., Dhallé, M., van Nugteren, B., Gao, P., Wessel, S. UTWENTE, Kirby, G., van Nugteren, J., Bajas, H., Benda, V., Ballarino, A., Bajko, M., Bottura, L., Broekens, K., Canale, M., Chiuchiolo, A., Fleiter, J., Gentini, L., Peray, N., Perez, J.C., de Rijk, G., Rijllart, A., Rossi, L., Murtomaeki, J., Mazet, J., Pincot, F-O., Lorin, C., Durante, M., and Fazilleau, P.

Subjects
10kA-20T class superconductor development [10.2], Future Magnets (MAG) [10], Accelerators and Storage Rings
Published
2017

25. Powering of an HTS dipole insert-magnet operated standalone in helium gas between 5 and 85 K

Author

Nugteren, J van, primary, Kirby, G, additional, Bajas, H, additional, Bajko, M, additional, Ballarino, A, additional, Bottura, L, additional, Chiuchiolo, A, additional, Contat, P-A, additional, Dhallé, M, additional, Durante, M, additional, Fazilleau, P, additional, Fontalva, A, additional, Gao, P, additional, Goldacker, W, additional, Kate, H ten, additional, Kario, A, additional, Lahtinen, V, additional, Lorin, C, additional, Markelov, A, additional, Mazet, J, additional, Molodyk, A, additional, Murtomäki, J, additional, Long, N, additional, Perez, J, additional, Petrone, C, additional, Pincot, F, additional, Rijk, G de, additional, Rossi, L, additional, Russenschuck, S, additional, Ruuskanen, J, additional, Schmitz, K, additional, Stenvall, A, additional, Usoskin, A, additional, Willering, G, additional, and Yang, Y, additional

Published
2018
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32. Intrawire resistance, AC loss and strain dependence of critical current in MgB2 wires with and without cold high-pressure densification

Author

Zhou C., Gao P., Krooshoop H.J.G., Dhallé M., Sumption M.D., Rindfleisch M., Tomsic M., Kulich M., Senatore C., and Nijhuis A.

Abstract

The intrawire resistance and alternating current (AC) loss of two MgB2 wires with filaments surrounded by Nb barriers have been measured and analyzed. Relatively high values of filament to matrix contact resistivity are found in the MgB2 wires; the values are two or three orders higher than those commonly found in NbTi or Nb3Sn wires. Considering the high porosity of the MgB2 filaments cold high pressure densification has been applied on the two MgB2 wires to investigate its impact on intrawire resistance and AC loss. The intrawire resistance is measured with a direct four probe voltage current method at various temperatures. The AC loss is measured by vibrating sample magnetometer measurements at 4.2 K. In addition to the intrawire resistance measurements the critical current of MgB2 wires before and after densification is measured with a U shaped bending spring at 4.2 K as function of axial strain. The critical current in densified MgB2 wires is found to be higher than that in the same wire without densification; it is also less sensitive to the applied axial strain.

Published
2014
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33. Intra-wire resistance and AC loss in multi-filamentary MgB2wires

Author

Zhou, C, primary, Offringa, W, additional, Bergen, A, additional, Wessel, W A J, additional, Krooshoop, H J G, additional, Dhallé, M, additional, Sumption, M D, additional, Collings, E W, additional, Rindfleisch, M, additional, Tomsic, M, additional, ten Kate, H H J, additional, and Nijhuis, A, additional

Published
2012
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44. Characterization of low AC loss elementary and assembled BSCCO conductors

Author

Lehtonen, J, primary, Masti, M, additional, Joronen, J, additional, Zabara, O, additional, Schmidt, C, additional, Goldacker, W, additional, Leghissa, M, additional, Oomen, M, additional, Arndt, T J, additional, Bruzek, C-E, additional, Dhallé, M, additional, Haken, B ten, additional, Kate, H H J ten, additional, Zaragoza, A, additional, Opagiste, C, additional, and Jorda, J-L, additional

Published
2005
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45. AC coil, reactor and cable demonstrations of low AC loss elementary and assembled BSCCO conductors

Author

Lehtonen, J, primary, Masti, M, additional, Nast, R, additional, Schmidt, C, additional, Goldacker, W, additional, Leghissa, M, additional, Oomen, M, additional, Hussennether, V, additional, Arndt, T J, additional, Bruzek, C-E, additional, Allais, A, additional, Dhallé, M, additional, Haken, B ten, additional, Kate, H H J ten, additional, and Jorda, J-L, additional

Published
2005
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