Publications

Marco Bonura, Gianmarco Bovone, Pablo Cayado Llosa and Carmine Senatore

IEEE transactions on applied superconductivity 33 5 (2023)

Pablo Cayado Llosa, Jens Hänisch, Kazumasa Iida and Carmine Senatore

Superconductor science and technology 36 9, 090401 (2023)

Pablo Cayado Llosa, Marco Bonura, Celia Lucas Esparseil, Enora Saule, Hannes Rijckaert, Tommaso Bagni, Konstantina Konstantopoulou, Matteo Alessandrini and Carmine Senatore

Scientific reports 13 1, 16917 (2023)

We report the evolution of the superconducting properties of a commercial coated conductor during deoxygenation and reoxygenation processes. By analyzing the changes on the critical temperature, T _c , and critical current density, J _c , at 4 and 77 K, we have identified the…

Mohammad Yazdani-Asrami, Wenjuan Song, Antonio Morandi, Giovanni De Carne, Joao Murta-Pina, Anabela Pronto, Roberto Oliveira, Francesco Grilli, Enric Pardo, Michael Parizh, Boyang Shen, Tim Coombs, Tiina Salmi, Di Wu, Eric Coatanea, Dominic A Moseley, Rodney A Badcock, Mengjie Zhang, Vittorio Marinozzi, Nhan Tran, Maciej Wielgosz, Andrzej Skoczeń, Dimitrios Tzelepis, Sakis Meliopoulos, Nuno Vilhena, Guilherme Sotelo, Zhenan Jiang, Veit Große, Tommaso Bagni, Diego Mauro, Carmine Senatore, Alexey Mankevich, Vadim Amelichev, Sergey Samoilenkov, Tiem Leong Yoon, Yao Wang, Renato P Camata, Cheng-Chien Chen, Ana Maria Madureira and Ajith Abraham

Superconductor science and technology 36 4, 043501 (2023)

This paper presents a roadmap to the application of AI techniques and big data (BD) for different modelling, design, monitoring, manufacturing and operation purposes of different superconducting applications. To help superconductivity researchers, engineers, and manufacturers understand the…

European physical journal. C, Particles and fields 83 9, 864 (2023)

A muon collider would enable the big jump ahead in energy reach that is needed for a fruitful exploration of fundamental interactions. The challenges of producing muon collisions at high luminosity and 10 TeV centre of mass energy are being investigated by the recently-formed International Muon…

Gianmarco Bovone, Florin Buta, Francesco Lonardo, Tommaso Bagni, Marco Bonura, D. LeBoeuf, S.c. Hopkins, T. Boutboul, A. Ballarino and Carmine Senatore

Superconductor science and technology 36 9, 095018 (2023)

We successfully manufactured 12-filament rod-in-tube Nb$_{3}$Sn wires with oxide nanoparticles formed by the internal oxidation method. We employed Nb-7.5 wt%Ta-1 wt%Zr and Nb-7.5 wt%Ta-2 wt% Hf alloys along with oxygen sources (OSs) in two different configurations—in the core of Nb filaments…

Carmine Senatore, Tommaso Bagni, José Ferradas Troitino, B Bordini and A Ballarino

Superconductor science and technology 36 7, 075001 (2023)

Future particle colliders in search for new physics at the energy frontier require the development of accelerator magnets capable of producing fields well beyond those attainable with Nb-Ti. As the next generation of high-field accelerator magnets is presently planned to be based on Nb ₃ …

Marco Bonura, Pablo Cayado Llosa, Konstantina Konstantopoulou, Matteo Alessandrini and Carmine Senatore

ACS applied electronic materials (2022)

The degradation of the superconducting properties of REBa2Cu3O7−x coated conductors when heated above 150 °C is a topic of concern for any REBa2Cu3O7−x-based applications. This study makes it clear the role of thermally activated oxygen out-diffusion processes in the modification of the…

Tommaso Bagni, Hugo Maximilien Haldi, Diego Mauro and Carmine Senatore

IOP SciNotes 3 1, 015201 (2022)

We developed a graphical user interface (GUI) to analyse tomographic images of superconducting Nb ₃ Sn wires designed for the next generation accelerator magnets. The Tomography Analysis Tool (TAT) relies on the k -means algorithm, an unsupervised machine learning technique which is…

Tommaso Bagni, Diego Mauro, Marta Majkut, Alexander Rack and Carmine Senatore

Superconductor science and technology 35 10, 104003 (2022)

This paper reports a novel non-destructive and non-invasive method to investigate crack formation and propagation in high-performance Nb$_{3}$Sn wires by combining x-ray tomography and deep learning networks. The next generation of high field magnet applications relies on the development of new…

D. Fonnesu, A. Baris, S. Calatroni, L. Lain Amador, S. Pfeiffer, G. Rosaz, Marco Bonura and Carmine Senatore

Superconductor science and technology 35 12, 125003 (2022)

In the framework of the Future Circular Collider Study, the development of thin-film coated superconducting radio-frequency copper cavities capable of providing higher accelerating fields (10–20 MV m$^{−1}$ against 5 MV m$^{−1}$ for the Large Hadron Collider) represents a major…

L. Rossi, A. Ballarino, D. Barna, E. Benedetto, C. Calzolaio, G. Ceruti, E. De Matteis, A. Echeandia, T. Ekelof, S. Farinon, E. Felcini, M. Gehring, G. Kirby, T. Lecrevisse, J. Lucas, S. Mariotto, J. Munilla, R. Musenich, A. Pampaloni, K. Pepitone, D. Perini, D. Popovic, M. Prioli, M. Pullia, L. Quettier, S. Sanfilippo, Carmine Senatore, E. Shabagin, M. Sorbi, M. Statera, D. Tommasini, F. Toral, R. Valente, D. Veres and M. Vieweg

IEEE transactions on applied superconductivity 32 4, 1-7 (2022)

Next generation ion therapy magnets both for gantry and for accelerator (synchrotron) are under investigation in a recently launched European collaboration that, in the frame of the European H2020 HITRIplus and I.FAST programmes, has obtained some funding for work packages on superconducting…

José Ferradas Troitino

Thèse, 294 (2022)

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…

Lucio Rossi and Carmine Senatore

Instruments 5 8 (2021)

In view of the preparation for a post-LHC collider, in 2010 the high-energy physics (HEP) community started to discuss various options, including the use of HTS for very high-field dipoles. Therefore, a small program was begun in Europe that aimed at exploring the possibility of using HTS for…

Florin Buta, Marco Bonura, Davide Matera, Gianmarco Bovone, A Ballarino, S C Hopkins, B Bordini, X Chaud and Carmine Senatore

Journal of Physics: Materials 4 025003 (2021)

The inhibition of Nb3Sn grain growth in the presence of ZrO2 nanoparticles appears to be one of the most promising method for pushing the critical current densities of Nb3Sn superconducting wires to levels that meet the requirements set for the Future Circular Collider. We have investigated the…

José Ferradas Troitino, H Bajas, L Bianchi, B Castaldo, P Ferracin, M Guinchard, S Izquierdo, J V Lorenzo, F Mangiarotti, J C Perez, E Takala, G Vallone and Carmine Senatore

Superconductor Science and Technology 34 084003 (2021)

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…

Yuhu Zhai, Bruce Berlinger, Christian Barth and Carmine Senatore

Superconductor Science and Technology 34 105003 (2021)

Fusion energy systems studies (FESS) for next-step devices based on the most promising magnetic configurations indicate that high magnetic fields and high current density for magnet coil systems may reduce device size and lower the cost. High current density and radiation resistant fusion magnets…

Marco Bonura, He Huang, Cong Liu, Yanwei Ma and Carmine Senatore

IEEE transactions on applied superconductivity 31 5, 7300105 (2021)

This work reports the longitudinal thermal conductivity, κ, of Ag- and Cu/Ag-sheathed Ba 1-x K x Fe 2 As 2 conductors. Our investigation has been carried out between 4 K and 80 K with magnetic fields up to 19 T. In the case of Ag-sheathed tapes, the thermal conductivity reaches maximum values of…

A. Molodyk, S. Samoilenkov, A. Markelov, P. Degtyarenko, S. Lee, V. Petrykin, M. Gaifullin, A. Mankevich, A. Vavilov, B. Sorbom, J. Cheng, S. Garberg, L. Kesler, Z. Hartwig, S. Gavrilkin, A. Tsvetkov, T. Okada, S. Awaji, D. Abraimov, A. Francis, G. Bradford, D. Larbalestier, Carmine Senatore, Marco Bonura, A. E. Pantoja, S. C. Wimbush, N. M. Strickland and A. Vasiliev

Scientific Reports 11 2084 (2021)

The fusion power density produced in a tokamak is proportional to its magnetic field strength to the fourth power. Second-generation high temperature superconductor (2G HTS) wires demonstrate remarkable engineering current density (averaged over the full wire), JE, at very high magnetic fields,…

José Ferradas Troitino, Tommaso Bagni, C Barth, B Bordini, P Ferracin, Luc Gamperle, D Tommasini, Damien Zurmuehle and Carmine Senatore

Superconductor Science and Technology 34 3, 035008 (2021)

High-performance Nb3Sn superconducting wires have become one of the key technologies for the development of next generation accelerator magnets. While their large critical current densities enable the design of compact accelerator-quality magnets for their operation above 10 T, the noticeable…

Tommaso Bagni, Gianmarco Bovone, A. Rack, Diego Mauro, Christian Barth, Davide Matera, Florin Buta and Carmine Senatore

Scientific Reports 11 7767 (2021)

The electro-mechanical and electro-thermal properties of high-performance Restacked-Rod-Process(RRP) Nb3Sn wires are key factors in the realization of compact magnets above 15 T for the future particle physics experiments. Combining X-ray micro-tomography with unsupervised machine learning…

Davide Matera, Marco Bonura, Radovan Cerny, Siobhan Mckeown Walker, Florin Buta, D. LeBoeuf, X. Chaud, Enrico Giannini and Carmine Senatore

Scientific Reports 10 17656 (2020)

The upper critical field sets the thermodynamic limit to superconductivity. A big gap is present between the upper-critical-field values measured in MgB2 polycrystalline bulk superconductors and those of thin films, where values as high as ~ 50 T have been achieved at 4.2 K. Filling this gap…

Luc Gamperle, José Ferradas Troitino, Christian Barth, B. Bordini, D. Tommasini and Carmine Senatore

Physical Review Research 2 013211 (2020)

The development of high-field accelerator magnets capable of providing 16-T dipolar fields is an indispensable technological breakthrough needed for the 100-TeV energy frontier targeted by the Future Circular Collider. As these magnets will be based on Nb3Sn Rutherford cables, the degradation of…

Marco Bonura, He Huang, Chao Yao, Yanwei Ma and Carmine Senatore

Superconductor Science and Technology 33 095008 (2020)

Understanding the mechanisms that limit the current transport in granular iron-based superconductors is necessary to unlock their potential for magnet applications. This paper reports the transport critical current surface IC(T,H) of powder-in-tube Ag/Ba1−xKxFe2As2 tapes densified by flat rolling …

Md. Shahriar A. Hossain, Carmine Senatore, Yusuke Yamauchi, Mislav Mustapić, Daniel Gajda, Dipak Patel, Aslam Khan, Jung Ho Kim, Andrzej J Morawski and René-Louis Flukiger

Journal of Magnesium and Alloys 8 2, 493-498 (2020)

The effect of cold high pressure densification (CHPD) on anisotropy of the critical current density (Jc) in « in situ » single core binary and alloyed MgB2 tapes has been determined as a function of temperatures at 4.2 K, 20 K and 25 K as well as at applied magnetic fields up to 19 T. The…

José Ferradas Troitino, G. Ambrosio, H. Bajas, L. Brouwer, P. Ferracin, S. Izquierdo Bermudez, J.V. Lorenzo Gomez, F.J. Mangiarotti, J.C. Perez, E. Ravaioli, E. Tapani Taakala, G. Vallone and Carmine Senatore

Cryogenics 106 103054 (2020)

New high-field accelerator magnets based on Nb3Sn superconductors are pushing the boundaries of magnet design and quench protection towards new limits. While their large stored energies and current densities result in a very challenging scenario for magnet protection, their great electromagnetic…

Md. Shahriar A. Hossain, Mislav Mustapić, Daniel Gajda, Carmine Senatore, Dipak Patel, Yusuke Yamauchi, Mahboobeh Shahbazi and René-Louis Flukiger

Journal of Magnetism and Magnetic Materials 497 166046 (2020)

The anisotropy of the critical current density, the n-factor and the irreversibility field of mono-core in-situ MgB2 tapes have been studied at various magnetic field orientations and temperatures. Undoped as well as silicon carbide (SiC) and malic acid (C4H6O5) added tapes were studied. The…

F. Avino, D. Fonnesu, T. Koettig, Marco Bonura, Carmine Senatore, A.T. Perez Fontenla, A. Sublet and M. Taborelli

Thin Solid Films 706 138058 (2020)

The production of a dense and void-free thin film on large and complex substrates is still a challenge in Physical Vapor Deposition. High Power Impulse Magnetron Sputtering (HiPIMS) with voltage inversion (positive pulse) after the main negative pulse is an attractive alternative to a negatively…

Davide Matera

Thèse (2020)

The MgB2 superconductor has significant potential for practical applications. The main points of strength are its critical temperature close to 40 K, which may allow operating in cryogen-free environments, the low cost of precursor materials, and the ease of manufacture. However, a large gap is…

Florin Buta and Carmine Senatore

IEEE Transactions on Applied Superconductivity 29 5, 6000709 (2019)

The study of next-generation high-energy accelerators based on 16 T dipoles has emphasized the need for higher performance, cost-effective Nb₃Sn superconducting wires. A Conductor Development Program aiming to reach a non-copper critical current density (Jc) of 1500 A/mm² at 16 T and 4.2 K has…

José Ferradas Troitino, Giorgio Ambrosio, Hugo Bajas, Bernardo Bordini, Paolo Ferracin, Jerome Fleiter, Susana Izquierdo Bermudez, Jose Vicente Lorenzo Gomez, Juan Carlos Perez, Giorgio Vallone and Carmine Senatore

IEEE Transactions on Applied Superconductivity 29 5, 1-6 (2019)

High field superconducting magnets for particle accelerators often exhibit premature quenches. Once a normal zone is generated within the conductor, the quench may propagate causing temperature and resistive voltage rise along the coil. The resulting thermal gradients can potentially cause new peak …

Bernd Seeber, Ciro Calzolaio, Damien Zurmuehle, Vital Christof Abacherli, M. Alessandrini, G. De Marzi and Carmine Senatore

Journal of Applied Physics 126 203905 (2019)

Strain plays an important role in Nb3Sn multifilamentary wires because critical current depends on it and strain sensitivity of Ic increases at higher magnetic fields. In this paper, a three-dimensional strain data set becomes available by further analysis of an earlier study of the Nb3Sn lattice…

Daniel Schoerling, Diego Arbelaez, Bernhard Auchmann, Marta Bajko, Amalia Ballarino, Emanuela Barzi, Giovanni Bellomo, Michael Benedikt, Susana Izquierdo Bermudez, Bernardo Bordini, Luca Bottura, Lucas Brouwer, Pierluigi Bruzzone, Barbara Caiffi, Shlomo Caspi, Ananda Chakraborti, Eric Coatanea, Gijs DeRijk, Marc Dhalle, Maria Durante, Pasquale Fabbricatore, Stefania Farinon, Helene Felice, Alejandro Fernandez, Inigo Sancho Fernandez, Peng Gao, Barbara Gold, Thodoris Gortsas, Steve Gourlay, Mariusz Juchno, Vadim Kashikhin, Charilaos Kokkinos, Sotiris Kokkinos, Kari Koskinen, Friedrich Lackner, Clement Lorin, Konstantinos Loukas, Alexandre Louzguiti, Kari Lyytikainen, Samuele Mariotto, Maxim Marchevsky, Giuseppe Montenero, Javier Munilla, Igor Novitski, Toru Ogitsu and Carmine Senatore

IEEE Transactions on Applied Superconductivity 29 4003109 (2019)

A future circular collider (FCC) with a center-of-mass energy of 100 TeV and a circumference of around 100 km, or an energy upgrade of the LHC (HE-LHC) to 27 TeV require bending magnets providing 16 T in a 50-mm aperture. Several development programs for these magnets, based on Nb 3 Sn technology,…

S. Schael, A. Atanasyan, J. Berdugo, T. Bretz, M. Czupalla, B. Dachwald, P. von Doetinchem, M. Duranti, H. Gast, W. Karpinski, T. Kirn, K. Lübelsmeyer, C. Maña, P.S. Marrocchesi, P. Mertsch, I.V. Moskalenko, T. Schervan, M. Schluse, K.-U. Schröder, A. Schultz von Dratzig, Carmine Senatore, L. Spies, S.P. Wakely, M. Wlochal, Davide Uglietti and J. Zimmermann

Nuclear Instruments and Methods in Physics Research. A 944 162561 (2019)

The next generation magnetic spectrometer in space, AMS-100, is designed to have a geometrical acceptance of 100 m 2 sr and to be operated for at least ten years at the Sun–Earth Lagrange Point 2. Compared to existing experiments, it will improve the sensitivity for the observation of new…

P Kováč, Marco Bonura, S Santra, L Kopera, A Rosová, Carmine Senatore and I Hušek

Superconductor Science and Technology 32 115007 (2019)

This paper presents a study of the thermal transport properties of extra-light MgB2/Ti/Al + Al2O3 composite wires. The longitudinal thermal conductivity has been investigated as a function of temperature and magnetic field on wires differing only by an outer Al + Al2O3 sheath. The correlation…

Christian Barth, P Komorowski, P Vonlanthen, R Herzog, R Tediosi, M Alessandrini, Marco Bonura and Carmine Senatore

Superconductor Science and Technology 32 7, 075005 (2019)

High temperature superconductors, especially rare-earth barium copper oxide (REBa₂Cu₃O₇₋ₓ or REBCO) tapes are an enabling technology for magnetic fields beyond 23.5 T, the limit of the existing technology based on the low temperature superconductors (LTS) niobium–titanium (NbTi) and…

Marco Bonura, Christian Barth and Carmine Senatore

IEEE Transactions on Applied Superconductivity 29 6400205 (2019)

The improved mechanical properties of the Ni-alloy reinforced Bi2-xPbxSr2Ca2Cu3O10-x(Bi-2223) – released on 2016 by the Sumitomo Electric Industries, Osaka, Japan , (HT-NX type) – renewed the interest on this material for high-field applications. Whether Bi-2223 can be preferred to other…

Marco Bonura, Christian Barth, Anthony Joudrier, Jose Ferradas Troitino, Alexandre Fete and Carmine Senatore

IEEE Transactions on Applied Superconductivity 29 5 (2019)

No-insulation and partial-insulation are novel approaches for compact, high field rare-earth-Ba2Cu3O7-x-coated conductor magnets. They maximize the current density and overcome some of the coated conductors’ intrinsic challenges such as the low normal zone propagation velocity and the resulting…

Vivien Raginel, Marco Bonura, David Kleiven, Karolina Kulesz, Matthias Mentink, Carmine Senatore, Rudiger Schmidt, Andrzej Siemko, Arjan Verweij, Andreas Will and Daniel Wollmann

IEEE Transactions on Applied Superconductivity 28 4, 1-10 (2018)

The energy stored in the particle beams of an accelerator such as CERNs LHC is substantial and requires a complex machine protection system to protect the equipment from damage. Despite efficient beam absorbers, several failure modes can lead to beam impact on superconducting magnets. The energy…

Davide Matera, Marco Bonura, Christian Barth, Alexandre Fete, Radovan Cerny, Enrico Giannini and Carmine Senatore

IEEE Transactions on Applied Superconductivity 28 4, 1-5 (2018)

The effect of a rapid internal magnesium diffusion synthesis on the electrical, magnetic, and microstructural properties of binary MgB2 bulk samples has been investigated. We have used a laboratory-made induction furnace to reduce the reaction time, typically of many hours, to few minutes. We…

Marco Bonura, F Avitabile, Christian Barth, J Jiang, D Larbalestier, Alexandre Fete, A Leo, L Bottura and Carmine Senatore

Materials Research Express 5 5, 056001 (2018)

The residual-resistivity ratio (RRR) of the normal-metal matrix is a key parameter for the electrical and thermal stability of technical superconductors. In Bi2Sr2CaCu2 ${{ m{O}}}_{8+x}$ (Bi-2212) round wires, the precursor powders are embedded in a Ag matrix without any diffusion barrier, and…

Alexander Usoskin, Ulrich Betz, Frank Hofacker, Alexander Rutt, Klaus Schlenga, Burkhard Prause, Lucio Rossi, Luca Bottura, Amalia Ballarino, Carmine Senatore, Anna Kario, Wilfried Goldacker, Alexander Meledin, Dmytro Abraimov and David Larbalestier

IEEE Transactions on Applied Superconductivity 28 4, 1-6 (2018)

Double disordered (DD) HTS layers processed via high-fluence PLD with modulated pressure and barium zirconate precipitation yield very high engineering current densities, above 900 and 600 A/mm2 at 18 and 31 T, respectively, measured at 4.2 K and B||c. Tape architecture is based on 50-100-μm-thick …

Davide Tommasini, Diego Arbelaez, Bernhard Auchmann, Hugues Bajas, Marta Bajko, Amalia Ballarino, Emanuela Barzi, Giovanni Bellomo, Michael Benedikt, Susana Izquierdo Bermudez, Bernardo Bordini, Luca Bottura, Lucas Brower, Marco Buzio, Barbara Caiffi, Shlomo Caspi, Marc Dhalle, Maria Durante, Gijs deRijk, Pasquale Fabbricatore, Stefania Farinon, Paolo Ferracin, Peng Gao, Steve Gourlay, Mariusz Juchno, Vadim Kashikhin, Friedrich Lackner, Clement Lorin, Maxim Marchevsky, Vittorio Marinozzi, Teresa Martinez, Javier Munilla, Igor Novitski, Toru Ogitsu, Rafal Ortwein, Juan Carlos Perez, Carlo Petrone, Soren Prestemon, Marco Prioli, Jean-Michel Rifflet, Etienne Rochepault, Stephan Russenschuck, Tiina Salmi, Frederic Savary, Daniel Schoerling, Michel Segreti, Massimo Sorbi, Antti Stenvall, Ezio Todesco, Fernando Toral, Arjan P. Verweij, Sander Wessel, Felix Wolf and Alexander V. Zlobin

IEEE Transactions on Applied Superconductivity 28 3, 1-5 (2018)

A next step of energy increase of hadron colliders beyond the LHC requires high-field superconducting magnets capable of providing a dipolar field in the range of 16 T in a 50-mm aperture with accelerator quality. These characteristics could meet the requirements for an upgrade of the LHC to twice…

Lucio Rossi, Arnaud Badel, Hugues Bajas, Marta Bajko, Amalia Ballarino, Christian Barth, Ulrich Betz, Luca Bottura, Francesco Broggi, Antonella Chiuchiolo, Marc Dhalle, Maria Durante, Philippe Fazilleau, Jerome Fleiter, Peng Gao, Wilfried Goldacker, Anna Kario, Glyn Kirby, E. Haro, J. Himbele, C. Lorin, J. Murtomaki, Jeroen van Nugteren, Carlo Petrone, Gijs de Rijk, J. Ruuskanen, Carmine Senatore, Marco Statera, Antti Stenvall, Pascal Tixador, Yifeng Yang, Alexander Usoskin and Nikolaj Zangenberg

IEEE Transactions on Applied Superconductivity 28 3, 1-10 (2018)

The EuCARD2 collaboration aims at the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, to be tested in small coils and magnets capable to deliver 3-5 T when energized in stand-alone mode, and 15-18 T when inserted in a 12-13 T background…

Christian Barth, Bernd Seeber, A. Rack, Ciro Calzolaio, Y. Zhai, Davide Matera and Carmine Senatore

Scientific Reports 8 6589 (2018)

Understanding the critical current performance variation of Nb3Sn superconducting wires under mechanical loading is a crucial issue for the design of next generation accelerator and fusion magnets. In these applications, the mechanical properties of the conductors may become a limiting factor due…

Christian Barth, Marco Bonura and Carmine Senatore

IEEE Transactions on Applied Superconductivity 28 4, 1-6 (2018)

The current carrying capabilities of high critical temperature (Tc) technical conductors have considerably improved in recent years, and this has practical consequences on the requirements of the measurement equipment. We have designed, constructed, and tested a probe for high-current,…

Alexandre Fete and Carmine Senatore

Scientific Reports 8 17703 (2018)

For more than 30 years, the remarkable superconducting properties of REBa2Cu3O7−x (RE = rare earth) compounds have triggered research studies across the world. Accordingly, significant progresses have been made both from a basic understanding and a fabrication processes perspective. Yet, today,…

Davide Tommasini, B. Auchmann, Hugues Bajas, Marta Bajko, Amalia Ballarino, Giovanni Bellomo, Michael Benedikt, Susana Izquierdo Bermudez, Bernardo Bordini, Luca Bottura, Marco Buzio, Marc Dhalle, Maria Durante, Gijs de Rijk, Pasquale Fabbricatore, Stefania Farinon, Paolo Ferracin, Peng Gao, Friedrich Lackner, Clement Lorin, Vittorio Marinozzi, Teresa Martinez, J. Munilla, Toru Ogitsu, Rafal Ortwein, Juan Perez, M. Prioli, Jean-Michel Rifflet, Etienne Rochepault, Stephan Russenschuck, Tiina Salmi, Frederic Savary, Daniel Schoerling, Michel Segreti, Carmine Senatore, Massimo Sorbi, Antti Stenvall, Ezio Todesco, Fernando Toral, Arjan P. Verweij, Giovanni Volpini, Sander Wessel and Felix Wolf

IEEE transactions on applied superconductivity 27 4 (2017)

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…

Yuhu Zhai, Chuck Kessel, Christian Barth and Carmine Senatore

IEEE transactions on applied superconductivity 27 4, 1-5 (2017)

High-performance superconducting magnets play an important role in the design of the next step large-scale, high-field fusion reactors such as the fusion nuclear science facility (FNSF) and the spherical tokamak (ST) pilot plant beyond ITER. Princeton Plasma Physics Laboratory is currently leading…

T Baumgartner, J Hecher, J Bernardi, S Pfeiffer, Carmine Senatore and M Eisterer

Superconductor science and technology 30 1, 014011 (2017)

We present two magnetometry-based methods suitable for assessing gradients in the critical temperature and hence the composition of multifilamentary superconductors: AC magnetometry and scanning Hall probe microscopy. The novelty of the former technique lies in the iterative evaluation procedure we …

Marco Bonura and Carmine Senatore

IEEE transactions on applied superconductivity 27 4 (2017)

A study of the quench propagation velocity in coated conductors produced by various manufacturers is presented. Based on an experimental investigation of the thermal and electrical properties of the coated conductors, the longitudinal normal zone propagation velocity has been calculated as a…

René-Louis Flukiger, Tiziana Spina, Fernanda Cerutti, A Ballarino, C Scheuerlein, L Bottura, Y Zubavichus, A Ryazanov, R D Svetogovov, S Shavkin, P Degtyarenko, Y Semenov, Carmine Senatore and Radovan Cerny

Superconductor Science and Technology 30 5, 054003 (2017)

Nb3Sn platelets with thicknesses between 0.12 and 0.20 mm produced by a high isostatic pressure process at 1250 °C were irradiated at 300 K with 12 MeV protons. The effects of irradiation on the lattice parameter a, the atomic order parameter S and the transition temperature Tc were measured as a…

A. Badel, A. Ballarino, Christian Barth, L. Bottura, M. M. J. Dhalle, J. Fleiter, W. Goldacker, J. Himbele, A. Kario, L. Rossi, A. Rutt, C. Scheuerlein, Carmine Senatore, P. Tixador, A. Usoskin and Y. Yang

IEEE transactions on applied superconductivity 26 3 (2016)

The objective of the EuCARD2 WP10 (Future Magnets) research activity is to demonstrate high-temperature superconducting magnet technology for accelerator applications by building a short demonstrator dipole with an aperture of 40 mm, operating field of 5 T, and understood field quality. One of the…

Marco Bonura and Carmine Senatore

Applied physics letters 108 24, 242602 (2016)

Based on a study of the thermophysical properties, we derived a practical formula for the normal zone propagation velocity appropriate for REBa2Cu3O7-x coated conductors in high magnetic fields. An analytical expression to evaluate the current sharing temperature as a function of the operating…

G. Kirby, L. Rossi, A. Badel, M. Bajko, A. Ballarino, L. Bottura, Marc Dhalle, M. Durante, P. Fazilleau, J. Fleiter, W. Goldacker, E. Haro, J. Himbele, A. Kario, S. Langeslag, C. Lorin, J. Murtzomaki, J. van Nugteren, G. de Rijk, T. Salmi, Carmine Senatore, A. Stenvall, P. Tixador, A. Usoskin, G. Volpini, Y. Yang and N. Zangenberg

IEEE transactions on applied superconductivity 26 3 (2016)

EuCARD-2 is a project partly supported by FP7 European Commission aiming at exploring accelerator magnet technology for 20-T dipole operating field. The EuCARD-2 collaboration is liaising with similar programs for high-field magnets in the U.S. and Japan. EuCARD-2 focuses, through the work package…

Y. Zhai, L. D'Hauthuille, Christian Barth and Carmine Senatore

IEEE transactions on applied superconductivity 26 4 (2016)

High-field superconducting magnets play a very important role in many large-scale physics experiments, particularly particle colliders and fusion confinement devices such as Large Hadron Collider (LHC) and International Thermonuclear Experimental Reactor (ITER). The two most common superconductors…

J. van Nugteren, B. van Nugteren, P. Gao, L. Bottura, Marc Dhalle, W. Goldacker, A. Kario, H. ten Kate, G. Kirby, E. Krooshoop, G. de Rijk, L. Rossi, Carmine Senatore, S. Wessel, K. Yagotintsev and Y. Yang

IEEE transactions on applied superconductivity 26 3 (2016)

EuCARD-2 aims to research ReBCO superconducting magnets for future accelerator applications. The properties of ReBCO conductors are very different from low-temperature superconductors. To investigate dynamic field quality, stability, and normal zone propagation, an electrical network model for…

Carmine Senatore, Christian Barth, Marco Bonura, Miloslav Kulich and Giorgio Mondonico

Superconductor science and technology 29 1, 014002 (2016)

Scaling relations describing the electromagnetic behaviour of coated conductors (CCs) greatly simplify the design of REBCO-based devices. The performance of REBCO CCs is strongly influenced by fabrication route, conductor architecture and materials, and these parameters vary from one manufacturer…

Christian Barth, P. Komorowski, R. Tediosi, R. Herzog, R. Schneider and Carmine Senatore

IEEE transactions on applied superconductivity 26 4 (2016)

Recent progress in second-generation (2G) rare-earth-Ba2Cu3O7-x (REBCO) coated conductors (CCs) has paved the way for the development of all-superconducting magnets generating fields well above 23.5 T, i.e., beyond the limits of the present technology based on Nb3Sn. However, the design of REBCO…

Alexandre Fete, Lidia Rossi, Andrea Augieri and Carmine Senatore

Applied physics letters 109 19, 192601 (2016)

In this paper, we present a detailed investigation of the self-field transport properties of an ionic liquid gated ultra-thin YBa2Cu3O7−x (YBCO) film. From the high temperature dynamic of the resistivity (>220 K), different scenarios pertaining to the interaction between the liquid and the thin…

D Abraimov, A Ballarino, Christian Barth, L Bottura, R Dietrich, A Francis, J Jaroszynski, G S Majkic, J McCallister, A Polyanskii, L Rossi, A Rutt, M Santos, K Schlenga, V Selvamanickam, Carmine Senatore, A Usoskin and Y L Viouchkov

Superconductor science and technology 28 11, 114007 (2015)

A significant increase of critical current in high magnetic field, up to 31 T, was recorded in long tapes manufactured by employing a double-disorder route. In a double-disordered high-temperature superconductor (HTS), a superimposing of intrinsic and extrinsic disorder takes place in a way that…

Marco Bonura and Carmine Senatore

Superconductor science and technology 28 2, 025001 (2015)

The use of REBCO coated conductors (CCs) is envisaged for many applications, extending from power cables to high-field magnets. Whatever the case, thermal properties of REBCO tapes play a key role for the stability of superconducting devices. In this work, we present the first study on the…

L. Rossi, A. Badel, M. Bajko, A. Ballarino, L. Bottura, M. M. J. Dhalle, M. Durante, Ph. Fazilleau, J. Fleiter, W. Goldacker, E. Haro, A. Kario, G. Kirby, C. Lorin, J. van Nugteren, G. de Rijk, T. Salmi, Carmine Senatore, A. Stenvall, P. Tixador, A. Usoskin, G. Volpini, Y. Yang and N. Zangenberg

IEEE transactions on applied superconductivity 25 3, 1-7 (2015)

EuCARD-2 is a project supported by FP7-European Commission that includes, inter alia, a work-package (WP10) called “Future Magnets.” This project is part of the long term development that CERN is launching to explore magnet technology at 16 T to 20 T dipole operating field, within the scope of…

Marco Bonura and Carmine Senatore

IEEE transactions on applied superconductivity 25 3, 1-4 (2015)

REBCO coated conductors (CCs) have the potential to widen considerably the application areas of superconductivity. Quench protection of REBCO-based devices represents one of the major obstacles to this expansion. Thermal conductivity data are mandatory ingredients for quench simulation studies. In…

Christian Barth, M Takayasu, N Bagrets, C M Bayer, K-P Weiss and C Lange

Superconductor science and technology 28 4, 045015 (2015)

The twisted stacked-tape cable (TSTC) is one of the major high temperature superconductor cable concepts combining scalability, ease of fabrication and high current density making it a possible candidate as conductor for large scale magnets. To simulate the boundary conditions of such a magnets as…

Christian Barth, Giorgio Mondonico and Carmine Senatore

Superconductor science and technology 28 4, 045011 (2015)

Rare-Earth-barium–copper–oxide tapes are now available from several industrial manufacturers and are very promising conductors in high field applications. Due to diverging materials and deposition processes, these manufacturers’ tapes can be expected to differ in their electro-mechanical and…

Ciro Calzolaio, Giorgio Mondonico, A Ballarino, B Bordini, L Bottura, L Oberli and Carmine Senatore

Superconductor science and technology 28 5, 055014 (2015)

Nowadays there is a great deal of interest in the scientific community in developing next generation accelerator magnets based on high-Jc Nb3Sn Rutherford cables. Inside a cable the wires are subjected to the combined effect of axial and transverse load. Since Nb3Sn is a strain sensitive material,…

Marco Bonura and Carmine Senatore

Superconductor science and technology 28 11, 115014 (2015)

This paper presents a study of the thermal transport properties of MgB2 tapes differing in architecture, stabilization and constituent materials. The temperature and field dependence of thermal conductivity, $kappa(T,B)$, was investigated both along the conductor and in the direction perpendicular…

C. Scheuerlein, M. Di Michiel, Florin Buta, Bernd Seeber, Carmine Senatore, René-Louis Flukiger, T. Siegrist, T. Besara, J. Kadar, B. Bordini, A. Ballarino and L. Bottura

Superconductor science and technology 27 4, 044021 (2014)

The lattice parameter changes in three types of Nb3Sn superconducting wires during uniaxial stress–strain measurements at 4.2 K have been measured by high-energy synchrotron x-ray diffraction. The nearly-stress-free Nb3Sn lattice parameter has been determined using extracted filaments, and the…

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

Superconductor science and technology 27 7, 075002 (2014)

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…

Carmine Senatore, Matteo Alessandrini, Andrea Lucarelli, Riccardo Tediosi, Davide Uglietti and Yukikazu Iwasa

Superconductor science and technology 27 10, 103001 (2014)

Recent progresses in the second generation REBa2Cu3O7 − x (RE123) coated conductor (CC) have paved a way for the development of superconducting solenoids capable of generating fields well above 23.5 T, i.e. the limit of NbTi−Nb3Sn-based magnets. However, the RE123 magnet still poses several…

René-Louis Flukiger, T. Baumgartner, M. Eisterer, H. W. Weber, Tiziana Spina, C. Scheuerlein, Carmine Senatore, A. Ballarino and Laure Bottura

IEEE transactions on applied superconductivity 23 3, 8001404-8001404 (2013)

The variation of Tc and Jc for a series of binary and ternary alloyed Nb3Sn wires of the RRP and PIT type has been investigated after fast neutron irradiation (E>;0.1 MeV) at the TRIGA reactor in Vienna up to a fluence of φt = 1.4 × 1022 m-2. In contrast to Ti alloyed bronze route Nb3Sn wires,…

Marco Bonura and Carmine Senatore

IEEE transactions on applied superconductivity 23 3, 6000404-6000404 (2013)

We have developed a new experimental setup specifically designed for measuring thermal conductivity on technical superconductors in the range of temperatures 3-330 K in magnetic fields up to 21 T. Three Nb3Sn wires, produced by the powder-in-tube technique, the bronze route, and the internal tin…

Miloslav Kulich, René-Louis Flukiger, Carmine Senatore, M. Tropeano and R. Piccardo

Superconductor science and technology 26 10, 105019 (2013)

A substantially different behaviour was observed between MgB2 wires produced either by in situ or ex situ processing after applying the recently developed technique of cold high pressure densification (or CHPD). In contrast to in situ wires, where densification at 1.5 GPa on binary and ternary…

Carmine Senatore and René-Louis Flukiger

Applied physics letters 102 1, 012601 (2013)

It is well known that the A15 layer in the subelements of a powder-in-tube (PIT) Nb3Sn wire exhibits two different grain morphologies: a region with fine grains ( ∼200 nm in size) representing about 60% of the total A15 area and one with large grains (1–2 μm in size). By means of high…

Giorgio Mondonico

Thèse (2013)

The aim of this thesis is to present a comprehensive study of the effect of three-dimensional stresses on industrial A15 superconductors, from the microscopic and macroscopic point of views. The effects of stress and strain on the Nb3Sn crystallography have been described by means of a high-energy…

Carmine Senatore, Giorgio Mondonico, Florin Buta, Bernd Seeber, René-Louis Flukiger, B. Bordini, P. Alknes and Laure Bottura

IEEE transactions on applied superconductivity 22 3, 6001304-6001304 (2012)

Low temperature calorimetry was used to determine the distribution of the superconducting transition temperature in binary and Ta-doped wires fabricated by the Bronze route and by the Powder-In-Tube (PIT) method. From this analysis we were able to discern the effects of Sn and Ta compositions on…

Giorgio Mondonico, Bernd Seeber, Alexandre Ferreira, B. Bordini, L. Oberli, Laure Bottura, A. Ballarino, René-Louis Flukiger and Carmine Senatore

Superconductor science and technology 25 11, 115002 (2012)

High-performance Nb3Sn conductors are intended to be used in large-scale magnets like the International Thermonuclear Experimental Reactor (ITER) and in the upgrade of the Large Hadron Collider (LHC). Due to the occurrence of high electromagnetic forces, a detailed knowledge of the response of the…

B. Bordini, Laure Bottura, Giorgio Mondonico, L. Oberli, D. Richter, Bernd Seeber, Carmine Senatore, E. Takala and Davide Filippo Valentinis

IEEE transactions on applied superconductivity 22 3, 6000304 (2012)

In the framework of the EuCARD program, CERN is participating in the development of a 13 T 100-mm-aperture dipole magnet to upgrade the superconducting cable test facility FRESCA at CERN. The conductor candidates for building this magnet are two 1-mm Nb3Sn strands: the Powder In Tube (PIT) produced …

L. Muzzi, V. Corato, A. della Corte, G. De Marzi, Tiziana Spina, J. Daniels, M. Di Michiel, Florin Buta, Giorgio Mondonico, Bernd Seeber, René-Louis Flukiger and Carmine Senatore

Superconductor science and technology 25 5, 054006 (2012)

With the aim of clarifying the relationship between lattice deformations and superconducting properties of Nb3Sn technological wires we have carried out high-energy x-ray diffraction experiments at the European Synchrotron Radiation Facility (ESRF) in Grenoble on individual samples of…

G. De Marzi, V. Corato, L. Muzzi, A. della Corte, Giorgio Mondonico, Bernd Seeber and Carmine Senatore

Superconductor science and technology 25 2, 025015 (2012)

The full-matrix set of combined temperature (4.2–14 K) and applied axial strain (εa) data for the bulk pinning force of a technological Nb3Sn wire (OST type-I) has been studied at fields up to 19 T by combining transport (variable εa) and magnetic (variable T) measurements. Some length of the…

Marco Bonura, Enrico Giannini, Romain Viennois and Carmine Senatore

Physical review. B, Condensed matter and materials physics 85 13 (2012)

An extensive study of the magnetic properties of FeTe0.7Se0.3 crystals in the superconducting state is presented. We show that weak collective pinning, originating from spatial variations of the charge carrier mean free path (δl pinning), rules in this superconductor. Our results are compatible…

Bernd Seeber, Giorgio Mondonico and Carmine Senatore

Superconductor science and technology 25 5, 054002 (2012)

Knowledge of the critical current of Nb3Sn wires under mechanical loads is increasingly important. In this work, based on an investigation of the bronze Nb3Sn reference wire for the international ITER benchmarking, practical aspects of an Ic(ε,B) measurement are discussed and commented on. The use …

Marco Bonura, Enrico Giannini, Romain Viennois and Carmine Senatore

Physics procedia 36, 710-715 (2012)

The time relaxation of the magnetization in a FeTe0.7Se0.3 crystal has been investigated at different temperatures for applied magnetic fields up to 9 T. A power law time dependence of the magnetization has been observed in a wide range of times, temperatures and magnetic fields, being a sign that…

René-Louis Flukiger, Md Shahriar Al Hossain, Miloslav Kulich and Carmine Senatore

AIP conference proceedings 1435, 353-362 (2011)

The technical aspects correlated with the observed enhancement of mass density and critical current density in the filaments of in situ MgB2 wires by means of the recently developed Cold High Pressure Densification (CHPD) are reviewed. The present analysis first summarizes the results obtained by…

René-Louis Flukiger, Md Shahriar Al Hossain, Carmine Senatore and M. Rindfleisch

Physica. C, Superconductivity 471 21-22, 1119-1123 (2011)

The critical current density, Jc, of in situ MgB2 wires with C4H6O5 (malic acid) has been strongly enhanced by means of Cold High Pressure Densification (CHPD) at pressures up to 2.5 GPa prior to reaction. An increase in Jc by factors 2 and 8 was observed at 4.2 and 20 K, regardless of the applied…

Bernd Seeber, Alexandre Ferreira, Giorgio Mondonico, Florin Buta, Carmine Senatore, René-Louis Flukiger and T. Takeuchi

IEEE transactions on applied superconductivity 21 3, 2593-2596 (2011)

The critical current of a Nb3Al wire (RHQT process) with a rectangular cross section of 1.81 × 0.80 mm2 has been measured at 4.2 K under transverse compressive loads at fields between 15 T and 19 T. The same wire (HE2432) was previously used for winding an insert coil at NIMS (coil B) that…

Soumaila Zebret, Elena Torres, Enzo Terreno, Laure Guenee, Carmine Senatore and Joséf Hamacek

Dalton transactions 40 16, 4284 (2011)

The self-assembly of a carbonylpyridine-based heptadentate ligand with LnIII results in the formation of triangular trinuclear europium complexes, which exhibit interesting luminescent properties in the solid state and in solution. With a view to developing multimodal responsive systems, we report…

René-Louis Flukiger, Md Shahriar Al Hossain, Carmine Senatore, Florin Buta and Matt Rindfleisch

IEEE transactions on applied superconductivity 21 3, 2649-2654 (2011)

By means of Cold High Pressure Densification (CHPD), the critical current density, Jc, of binary and alloyed MgB2 wires has been enhanced by more than a factor 2 at 4.2 K and at fields up to 19 T. The relative MgB2 mass density of binary MgB2 wires was enhanced to ~ 54% after applying 2.5 GPa at…

Carmine Senatore, Md Shahriar Al Hossain and René-Louis Flukiger

IEEE transactions on applied superconductivity 21 3, 2680-2685 (2011)

The cold high pressure densification technique (CHPD) was recently developed in Geneva for improving the in-field critical current density Jc of in situ binary and alloyed MgB2 wires and tapes,. Jc of CHPD treated square wires alloyed with malic acid (C4H6O5) was enhanced by a factor 2 at 10 T and…

B. Bordini, D. Bessette, Laure Bottura, A. Devred, M. Jewell, D. Richter and Carmine Senatore

IEEE transactions on applied superconductivity 21 3, 3373-3376 (2011)

Magnetization measurements are relevant tests for the characterization of superconductors. Practically they are the only measurements that allow estimating the critical current density at low fields of low temperature superconductors, the effective filament size and the hysteresis losses. For this…

Md Shahriar Al Hossain, Carmine Senatore, M Rindfleisch and René-Louis Flukiger

Superconductor science and technology 24 7, 075013 (2011)

Cold high pressure densification (CHPD) has recently been found to be a promising way to improve the critical current density, Jc, in single-core MgB2 wires prepared by in situ processing. In this work, the CHPD process was also applied to multifilamentary, binary MgB2 wires, leading again to a…

Bernd Seeber, Alexandre Ferreira, Giorgio Mondonico, Florin Buta, Carmine Senatore, René-Louis Flukiger and Takahiro Takeuchi

Superconductor science and technology 24 3, 035011 (2011)

The electromechanical behavior of a Nb3Al wire manufactured according to the RHQT process (rapid-heating, quenching and transformation) has been investigated at magnetic fields between 15 and 19 T at 4.2 K. Of particular interest was the critical current, Ic, as a function of transverse pressure up …

Pol-Edern Le Renard, Rolf Lortz, Carmine Senatore, Jean-Philippe Rapin, Franz Buchegger, Alke Petri-Fink, Heinrich Hofmann, Eric Doelker and Olivier Jordan

Journal of magnetism and magnetic materials 323 8, 1054-1063 (2011)

The biological and therapeutic responses to hyperthermia, when it is envisaged as an anti-tumor treatment modality, are complex and variable. Heat delivery plays a critical role and is counteracted by more or less efficient body cooling, which is largely mediated by blood flow. In the case of…

Ian Pong, Christian Scheuerlein, Carmine Senatore, Ludovic Thilly, Marco Di Michiel, Alexandre Gerardin, Simon Hopkins, Luc-Rene Oberli, Guillaume Geandier, Bartek Glowacki and Luca Bottura

Diffusion and defect data, solid state data. Part A, Defect and diffusion forum 297-301, 695-701 (2010)

In order to investigate the high temperature exposure effect on Nb Ti/Cu superconducting strands, as might be encountered in joining by soldering and in cabling annealing, X-ray diffraction and resistometry measurements were performed in situ during heat treatment, and complemented by conventional…

Alexandre Piriou, Enrico Giannini, Yanina Fasano, Carmine Senatore and Oystein Fischer

Physical review. B, Condensed matter and materials physics 81 14 (2010)

We study the vortex phase diagram of the single-layer Bi2Sr2CuO6+δ (Bi2201) superconductor by means of bulk magnetization measurements on high-quality oxygen-overdoped crystals. In striking contrast with the results found in the moderately doped two- and three-layer Bi-based cuprates, Bi2201…

Giorgio Mondonico, Bernd Seeber, Carmine Senatore, René-Louis Flukiger, V. Corato, G. De Marzi and L. Muzzi

Journal of applied physics 108 9, 093906 (2010)

The critical current of an internal tin Nb3Sn wire developed by Oxford Instruments, Superconducting Technology for International Thermonuclear Experimental Reactor (ITER) (OST type-I, billet No. 7567) has been studied under axial strain at fields between 12 and 19 T at 4.2 K. Simulating the…

C. Scheuerlein, I. Pong, Carmine Senatore, M. Di Michiel, L. Thilly, A. Gerardin, B. Rehmer, L. Oberli, G. Willering and Laure Bottura

Journal of physics. Conference series 234 2, 022031 (2010)

The degradation mechanisms of state-of-the-art Nb-Ti/Cu superconductors are described, based on in-situ synchrotron X-ray diffraction measurements during heat treatment. A quantitative description of the Nb-Ti/Cu degradation in terms of critical current density, Cu stabiliser resistivity and…

Alberto Ubaldini, Enrico Giannini, Carmine Senatore and Dirk Van Der Marel

Physica. C, Superconductivity 470, S356-S357 (2010)

Alexander Petrovic, Yanina Fasano, R. Lortz, Carmine Senatore, A. Demuer, A. B. Antunes, A. Paré, D. Salloum, P. Gougeon, M. Potel and Oystein Fischer

Physical review letters 103 25 (2009)

Using scanning tunneling microscopy at 400 mK, we have obtained maps of around 100 vortices in SnMo6S8 from 2–9 T. The orientational and positional disorder at 5 and 9 T show that these are the first large-scale images of a vortex glass. At higher temperature a magnetization peak effect is…

René-Louis Flukiger, Md Shahriar Al Hossain and Carmine Senatore

Superconductor science and technology 22 8, 085002 (2009)

Cold high pressure densification was found to substantially enhance the critical current density of binary in situ Fe/MgB2 wires. A wire densified at 1.85 GPa exhibited at 20 K and 5 T an increase of Jc by 300% with respect to same wire without the application of pressure. At 4.2 K and 10 T, Jc was …

Md Shahriar Al Hossain, Carmine Senatore, René-Louis Flukiger, M. A. Rindfleisch, M. J. Tomsic, J. H. Kim and S. X. Dou

Superconductor science and technology 22 9, 095004 (2009)

Cold high pressure densification, a method recently introduced at GAP in Geneva, was applied for improving the transport critical current density, Jc, and the irreversibility field, Birr, of monofilamentary in situ MgB2 wires and tapes alloyed with 10 wt% C4H6O5 (malic acid). Tapes densified at…

Carmine Senatore and René-Louis Flukiger

Superconductor science and technology 22 9, 095016 (2009)

Measurements of the time decay of non-equilibrium magnetization of various industrial Y123-coated conductors have been performed in a dc magnetic field up to 9 T, at temperatures varying from 5 to 50 K. In addition, the temperature dependence of the zero-field-cooled (ZFC) magnetization has been…

René-Louis Flukiger, Carmine Senatore, Marco Cesaretti, Florin Buta, Davide Uglietti and Bernd Seeber

Superconductor science and technology 21 5, 054015 (2008)

The critical current density in industrial Nb3Sn and MgB2 wires is currently optimized by introducing various kinds of additives, either Ta and/or Ti for Nb3Sn wires or SiC or C for MgB2 wires. In the following, several problems linked to the presence of additives in the two classes of compounds…

René-Louis Flukiger, Davide Uglietti, Carmine Senatore and Florin Buta

Cryogenics 48 7-8, 293-307 (2008)

The production of superconducting Nb3Sn multifilamentary wires with optimized critical currents requires a detailed knowledge of various processes, involving both the mechanical deformation and the reaction kinetics. The physical properties of the Nb3Sn phase are briefly reviewed, the precise…

Davide Uglietti, Carmine Senatore, A. Reginelli, H. J. Mathieu and René-Louis Flukiger

IEEE transactions on applied superconductivity 18 2, 1010-1013 (2008)

From specific heat measurements of Ta + Ti alloyed bronze route multifilamentary Nb3Sn wires, a wide, nearly symmetric overall distribution of Tc can be determined. This is apparently in contradiction with the almost linear decrease of the Sn content towards the centre of the A15 filaments, which…

Bernd Seeber, Alexandre Ferreira, Florin Buta, Carmine Senatore, T. Boutboul, L. Oberli and René-Louis Flukiger

IEEE transactions on applied superconductivity 18 2, 976-979 (2008)

A study of the critical current of a PIT strand under transverse compressive and axial tensile loads is presented. The conductor is not reinforced and has a proof strength, , of 142 MPa. Although the tensile strain at the maximum of the critical current, , is only 0.14% (low thermal precompression) …

Carmine Senatore, René-Louis Flukiger, Marco Cantoni, G. Wu, R. H. Liu and X. H. Chen

Physical review. B, Condensed matter and materials physics 78 5 (2008)

We report specific-heat measurements at magnetic fields up to 20 T on the recently discovered superconductor SmFeAsO0.85F0.15. The B-T diagram of a polycrystalline SmFeAsO0.85F0.15 sample with Tc=46 K was investigated. The temperature dependence of Bc2 was extracted from the specific-heat curves; …

Vital Christof Abacherli, Florin Buta, Davide Uglietti, Carmine Senatore, Bernd Seeber and René-Louis Flukiger

IEEE transactions on applied superconductivity 17 2, 2564-2567 (2007)

We have analyzed the influence of Ta on the superconducting properties of Ti doped bronze processed (Nb, Ta, Ti)3Sn multifilamentary wires. The study was carried out on wires with identical configuration, consisting of 14,641 filaments with 4.5 mum diameter embedded in a Ti bearing Osprey bronze…

René-Louis Flukiger, Paola Lezza, Marco Cesaretti, Carmine Senatore and Roman Gladyshevskii

IEEE transactions on applied superconductivity 17 2, 2846-2849 (2007)

The simultaneous addition of various carbon based additives (in the present case B4C + SiC) to Mg and B powders has been introduced as a new concept in view of enhancing the superconducting parameters Bc2, Birr and Jc values of in situ Fe/MgB2 wires. A series of Fe sheathed monofilamentary wires of …

Paola Lezza, Carmine Senatore, Roman Gladyshevskii and René-Louis Flukiger

IEEE transactions on applied superconductivity 17 2, 2834-2837 (2007)

A correlation between the anisotropy of the critical current density J c in ex situ monofilamentary MgB2/Fe tapes and the degree of texturing of the MgB2 filaments has been found. After removing the Fe sheath, X-ray diffraction measurements were performed at various depths of MgB2 filaments. A…

Carmine Senatore, Vital Christof Abacherli, Marco Cantoni and René-Louis Flukiger

Superconductor science and technology 20 9, S217-S222 (2007)

We have investigated the influence of two different Ti doping methods on the superconducting properties of bronze route Nb3Sn multifilamentary wires. The first doping method introduces NbTi rods into NbTa filaments embedded in a Cu15.4Sn bronze matrix (‘internal’ Ti). The second method uses…

Carmine Senatore, Davide Uglietti, Vital Christof Abacherli, Alain Junod and René-Louis Flukiger

IEEE transactions on applied superconductivity 17 2, 2611-2614 (2007)

A new calorimeter has been built with the special purpose to determine the distribution of Tc in industrial superconducting wires. Specific heat measurements have been carried out on a series of multifilamentary Nb3Sn wires, using a long relaxation technique. The advantage of this technique…

Carmine Senatore, Paola Lezza, Rolf Lortz, O. Shcherbakova, W. K. Yeoh, S. X. Dou and René-Louis Flukiger

IEEE transactions on applied superconductivity 17 2, 2941-2944 (2007)

The effects of SiC and Carbon doping on the superconducting properties of MgB2 polycrystalline samples have been analysed by means of specific heat and magnetic relaxation measurements. It is known that the addition of nanometric powders of SiC and C leads to the enhancement of Birr and Jc….

S. X. Dou, O. Shcherbakova, W. K. Yeoh, J. H. Kim, S. Soltanian, X. L. Wang, Carmine Senatore, René-Louis Flukiger, Marc Dhalle, O. Husnjak and E. Babic

Physical review letters 98 9 (2007)

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…

Carmine Senatore, Paola Lezza and René-Louis Flukiger

AIP conference proceedings 824, 654-661 (2006)

Hysteresis and magnetic relaxation measurements have been performed on MgB2/Fe tapes in parallel and perpendicular magnetic field in order to investigate the correlation between the anisotropy of the transport current density and the texturing recently analysed by Lezza et al.. Volume pinning…

Carmine Senatore, Paola Lezza and René-Louis Flukiger

Journal of applied physics 100 11, 113913 (2006)

We found that the reduced pinning forces of ex situ MgB2 /Fe monofilamentary tapes do not scale with temperature if the external magnetic field is applied parallel to the tape surface. A model is proposed to explain the behavior of the volume pinning forces in parallel and perpendicular…

Yuxing Wang, Carmine Senatore, Vital Christof Abacherli, Davide Uglietti and René-Louis Flukiger

Superconductor science and technology 19 4, 263-266 (2006)

Multifilamentary superconducting Nb3Sn wires are widely used for industrial applications. Wires processed by the Bronze Route technique are characterized by a large number of filaments Nb1−xSnx, with 0.18≤x≤0.25, corresponding to a distribution of Tc between

Paola Lezza, Carmine Senatore and René-Louis Flukiger

Superconductor science and technology 19 10, 1030-1033 (2006)

An improvement of the transport critical current density, Jc, of MgB2 wires was obtained after the addition of 10 wt% B4C powders, after reaction at 800 °C: Jc values of 1 × 104 A cm−2 at 4.2 K and 9 T were obtained for wires of 1.11 mm diameter in a Fe matrix. The starting mixture of Mg and…

Carmine Senatore, Nicholas Clayton, Paola Lezza, S. Pace and René-Louis Flukiger

IEEE transactions on applied superconductivity 15 2, 3329-3332 (2005)

We report a study of the pinning properties of Fe/MgB2 tapes performed by means of ac and dc magnetic measurements. In particular, the third harmonic response of the ac susceptibility has been measured as a function of the dc magnetic field up to 9 T, at different temperatures, for various…

Paola Lezza, Roman Gladyshevskii, Carmine Senatore, Giuseppe Cusanelli, Hong-Li Suo and René-Louis Flukiger

IEEE transactions on applied superconductivity 15 2, 3196-3199 (2005)

Multifilamentary superconducting Nb3Sn wires are widely used for industrial applications. Wires processed by the Bronze Route technique are characterized by a large number of filaments Nb1−xSnx, with 0.18≤x≤0.25, corresponding to a distribution of Tc between

Paola Lezza, Vital Christof Abacherli, Nicholas Clayton, Carmine Senatore, Davide Uglietti, Hong-Li Suo and René-Louis Flukiger

Physica. C, Superconductivity 401 1-4, 305-309 (2004)

Fe/MgB2 tapes have been prepared starting with pre-reacted binary MgB2 powders. As shown by resistive and inductive measurements, the reduction of particle size to a few microns by ball milling has little influence on Bc2, while the superconducting properties of the individual MgB2 grains are…

Carmine Senatore, M. Polichetti, Nicholas Clayton, René-Louis Flukiger and S. Pace

Physica. C, Superconductivity 401 1-4, 182-186 (2004)

In a type-II superconductor the pinning properties and, in particular, the current dependence of the thermal activation energy U(J) determine the shape of the current–voltage (I–V) curve. The generation of higher harmonics in the magnetic response to an alternating magnetic field is a…