A5076280888- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Physics of Superconductivity and Magnetism
- Particle Accelerators and Free-Electron Lasers
- Superconductivity in MgB2 and Alloys
- HVDC Systems and Fault Protection
- Thermal Analysis in Power Transmission
- Spacecraft and Cryogenic Technologies
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Magnetic Properties and Applications
- Particle physics theoretical and experimental studies
- Fusion materials and technologies
- Dark Matter and Cosmic Phenomena
- Electrical Contact Performance and Analysis
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Magnetic and transport properties of perovskites and related materials
- Metal and Thin Film Mechanics
- Magnetic Field Sensors Techniques
- Distributed and Parallel Computing Systems
- Silicon Carbide Semiconductor Technologies
- Magnetic properties of thin films
- Electromagnetic Launch and Propulsion Technology
- Cystic Fibrosis Research Advances
University of Twente
2015-2025
European Organization for Nuclear Research
2015-2024
Yokohama National University
2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2018
University of Colorado Boulder
2016
Advanced Conductor Technologies (United States)
2016
University of Bonn
2015
Linde (United States)
2012
Fermi National Accelerator Laboratory
2012
Cryogenic Industries (United States)
2012
Conductor on Round Core (CORC®) technology has achieved a long sought-after benchmark by enabling the production of round, multifilament, (RE)Ba2Ca3O7−x coated conductors with practical current densities for use in magnets and power applications. Recent progress, including demonstration engineering density beyond 300 Amm−2 at 4.2 K 20 T, indicates that CORC® cables are viable conductor next generation high field magnets. Tapes 30 μm substrate thickness tape widths down to 2 mm have improved...
With the first tokamak designed for full nuclear operation now well into final assembly (ITER), and a major new research starting commissioning (JT60SA), fusion is becoming mainstream potential energy source future. A critical part of viability magnetic confinement superconductor technology. The experience gained lessons learned in application this technology to ITER JT60SA, together with improved superconducting materials, opening multiple routes commercial reactors. objective roadmap is,...
We review the scaling relations for critical current density (Jc) in Nb3Sn wires and include recent findings on variation of upper field (Hc2) with temperature (T) A15 composition. highlight deficiencies Summers/Ekin relations, which are not able to account correct Jc(T) dependence. Available Jc(H) results indicate that magnetic dependence all can be described Kramer's flux shear model, if non-linearities Kramer plots attributed inhomogeneities. The strain (eps) is introduced through a...
We study the feasibility of a new generation axion helioscope, most ambitious and promising detector solar axions to date. show that large improvements in magnetic field volume, x-ray focusing optics backgrounds are possible beyond those achieved CERN Axion Solar Telescope (CAST). For hadronic models, sensitivity axion-photon coupling gaγ ≳ few × 10−12 GeV−1 is conceivable, 1–1.5 orders magnitude CAST sensitivity. If also couple electrons, Sun produces larger flux for same value Peccei-Quinn...
We review the physics potential of a next generation search for solar axions: International Axion Observatory (IAXO) . Endowed with sensitivity to discover axion-like particles (ALPs) coupling photons as small gaγ∼ 10−12 GeV−1, or electrons gae∼10−13, IAXO has find QCD axion in 1 meV∼1 eV mass range where it solves strong CP problem, can account cold dark matter Universe and be responsible anomalous cooling observed number stellar systems. At same time, will have enough detect lower axions...
Abstract The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level 6–7 for high-temperature superconducting (HTS) technology operating in wind generator. To reach this goal, full-scale synchronous HTS generator successfully designed, built and field-tested 3.6 MW turbine. has rotor with 40 coils 1.4 m long. required >20 km coated conductor produced within project’s time schedule. All were tested prior assembly, >90% them behaving as expected. thus...
The dynamic resistance in a slab-like superconductor is calculated, taking into account field-dependent critical current density. In superconductors carrying DC transport an AC external magnetic field, the causes loss which depends on amplitude and frequency of this field as well current. This calculated analytically critical-state model applied to superconducting slab parallel field. has general periodic time dependence for relation between momentary Kim assumed. appears only at amplitudes...
Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The Enhanced European Coordination for Accelerator Research and Development (EuCARD-2) Work Package 10 is a collaborative push to take high-temperature superconductor (HTS) materials into an accelerator-quality demonstrator magnet. produce 5 T stand alone between 17 when inserted 100-mm aperture Fresca-2 high-field outsert HTS magnet demonstrate field strength quality that can be achieved. An effective...
The European Organization for Nuclear Research (CERN) is developing high-current ReBCO-CORC strand-based cables use in future large-scale detector magnets.A six-aroundone, forced flow gas-cooled cable-in-conduit conductor (CICC) envisioned application magnets operating the 20-40 K temperature range.A CICC, rated 45 kA at 4.2 and 10 T, designed production.The CICC comprises a cable of six CORC strands helically wound around tube.The has an expected current density 105 A/mm 2 T/4.2 K, which...
The critical current (Ic) of six different Nb3Sn multifilamentary wires is investigated as a function temperature, magnetic field, and strain. A relation for temperature (Tc) that depends on the deviatoric strain proposed applied to interpret results. First, short review given flux-pinning relations are used introduce dependent Tc in Ic field temperature. conductor samples two deformation states, namely, spiraled shape Ti sample holder straight section soldered onto brass substrate....
A new and promising method for the protection of superconducting high-field magnets is developed tested on so-called MQXC quadrupole magnet at CERN test facility. The relies a capacitive discharge system inducing, during few periods, an oscillation transport current in cable coil. corresponding fast change local magnetic field introduces high coupling-current loss, which, turn, causes quench large fraction coil due to enhanced temperature. Results measured discharges various levels are...
This paper describes the standalone magnet cold testing of high temperature superconducting (HTS) Feather-M2.1-2. was constructed within European funded FP7-EUCARD2 collaboration to test a Roebel type HTS cable, and is one first dipole magnets in world. The operated forced flow helium gas with temperatures ranging between 5 85 K. During tests magnetic field 3.1 T reached inside aperture at current 6.5 kA 5.7 These values are agreement self-field critical used SuperOx cable assembled Sunam...
We describe the magnet challenges for a Muon Collider, an exciting option considered future of particle physics at energy frontier. Starting from comprehensive work performed by US Accelerator Program, we have reviewed performance specifications dictated beam and operating conditions to satisfy accelerator needs. Among many magnets that make up muon collider, identified four systems represent well envelope challenges: target capture solenoid, final cooling dipoles collider dipoles. These...
Strain effects on critical current densities have been examined for conductors containing nearly stoichiometric Nb3Al filaments with fine grains. The phase in these multifilamentary are prepared by transformation from supersaturated Nb(Al) bcc solid solution and show high-field much larger than those conventionally conductors, where the is known to be off-stoichiometric. degradation of −0.7% intrinsic strain ca. 20% at 12 T, comparable conventional high tolerance.
The critical current in two types of axially deformed BSCCO/Ag tape conductors is investigated. An I/sub c/ reduction observed for small axial strains (ranging from 0 to 0.3%) with a characteristic slope di/sub c//d/spl epsiv/=-5/spl plusmn/1 (relative c/, change per relative length). In the case an compression there more pronounced reduction. For (<0.3%) certain reversible observed. This behaviour occurs combination irreversible that increases when number strain cycles increased. part...
of the quasi-adiabatic normal zone propagation velocity and quench energies a Superpower SCS4050 copper stabilised ReBCO superconducting tape are presented over temperature range 23 − 47 K; in parallel applied magnetic fields 6, 10 14 T; current from 50% to 100% Ic. The data compared results analytic predictions one-dimensional numerical simulations. availability long lengths coated conductor makes material interesting for many HTS applications operating well below boiling point liquid...
In recent years, three unique ReBCO-CORC CICC samples with six-around-one cable layout were developed as technology demonstrators at CERN in collaboration Advanced Conductor Technologies. The tests of these conductors low temperature external magnetic field yielded very promising results, but also showed several issues requiring improvement. A new 2.8 m long CORC has been prepared to replace a degraded sample. voids between strands the sample are filled solder alloy provide increased...
Last year a record central field of 11 T at first excitation 4.4 K has been achieved with the experimental LHC model dipole magnet MSUT by utilising high J/sub c/ powder-in-tube Nb/sub 3/Sn conductor. This is real breakthrough towards fields well above 10 4 K. The clear influence magnetisation and coupling currents on quality, quench behaviour temperature development in coils measured discussed. For application high-field accelerator magnets (10-15 dipoles, 300-400 T/m quadrupoles) these...
Various Nb/sub 3/Sn conductors are investigated in an axial strain experiment. The superconducting samples soldered to a substrate that is bent generate compressive or tensile strain. Especially the range critical current reduction smaller than predicted by well-known scaling law. influence of transverse components tape conductor changing thermal It found experiments can be described upper-critical field depends on deviatoric component tensor only. Finally comparison temperature and as...