Conveners
Thu-Af-Oral Sessions 15: Flux pinning, Stability, and AC Losses
- Arjan Verweij (CERN)
Dr
Alessandro Puri
(High Field Magnet Laboratory, Institute of Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525 ED Nijmegen, Netherlands)
10/07/2014, 14:00
M-09: Flux pinning and critical current
Oral presentation (15min)
The discovery of FeSexTe1−x compounds belonging to the (11) family of iron chalcogenides attracted the attention of both theoreticians and experimentalists because of their simple crystal structure and a rich phase diagram where magnetic and superconducting phases may coexist forming two networks at the nanoscale.
Thanks to the high values of the upper critical field and to the critical...
Kostyantyn Yagotyntsev
(University of Twente, Faculty of Science & Technology, 7522 NB Enschede, The Netherlands)
10/07/2014, 14:15
M-08: Superconductor stability and AC losses
Oral presentation (15min)
Single ReBCO coated conductor tapes must be assembled in a cable geometry to reach currents in the order of several tens of kA. For AC application, wire twist can be introduced to reduce coupling currents during magnetic field ramping but also the inter-tape contact resistance plays a crucial role. Two cable types were subjected to transverse applied alternating magnetic fields, CORC...
Dr
Pavol Kováč
(Institute of Electrical Engineering of SAS)
10/07/2014, 14:30
M-04: MgB2 processing and properties
Oral presentation (15min)
Thermally stabilized filamentary MgB2 wires with variable barriers (Nb, Ti, NbTi and C) and not magnetic sheaths (SS and GlidCop) have been made by in-situ PIT process. Critical current densities, Jc, and AC losses of wires and cables with different barriers and twist pitches have been measured and compared. AC loss of MgB2 wires exposed to the external AC magnetic field perpendicular to...
Chao Zhou
(University of Twente, Faculty of Science & Technology, 7522 NB Enschede, The Netherlands)
10/07/2014, 14:45
M-08: Superconductor stability and AC losses
Oral presentation (15min)
The intra-strand resistance and current transfer length of multifilamentary NbTi, Nb3Sn, MgB2, BSSCO and ReBCO superconductors has been measured with a direct four-probe voltage-current method at various temperatures. With the aid of Finite Element Method simulations, the filament-to-matrix contact resistance and effective transverse resistivity are derived from the intra-strand resistance...
Idan Shilon
(CERN)
10/07/2014, 15:00
M-08: Superconductor stability and AC losses
Oral presentation (15min)
The stability of high-current superconductors is challenging in the design of superconducting magnets. When the stability requirements are fulfilled, the protection against a quench must still be considered. A main factor in the design of quench protection systems is the resistance growth rate in the magnet following a quench. The usual method for determining the resistance growth in...
Yury Ivanov
(Chubu University)
10/07/2014, 15:15
M-08: Superconductor stability and AC losses
Oral presentation (15min)
Despite intensive research in the field of applied superconductivity only now we start to use of this phenomenon for the most obvious application, namely, power transmission. At present, it can be seen an explicit shift from AC to DC HTS cable systems due to the many advantages of the DC ones. However, even at constant current transmission line is subjected to current fluctuations and,...
Yifeng Yang
(University of Southampton)
10/07/2014, 15:30
M-04: MgB2 processing and properties
Oral presentation (15min)
Superconducting cables operating in a significant longitudinal temperature gradient with forced flow cooling by cryogenic gases, currently investigated for certain specialised applications such as the cold-powering of the high luminosity upgrade of the LHC, have a potentially wider use because of their flexible temperature margins. While superconducting cables and bus-bars in cryogenic liquids...
