Conveners
M1OrC - Superconductor Stability and AC Losses
- Naoyuki Amemiya (Kyoto University)
- Francesco Grilli (Karlsruhe Institute of Technology)
Dr
Anna Kario
(Karlsruhe Institute of Technology, Institute for Technical Physics)
29/06/2015, 16:00
ICMC-08 - Superconductor Stability and AC Losses
Invited Oral Presentation
The physical properties of REBCO (RE=rare earth) high temperature superconductors require a flat tape architecture enabling them to carry high current densities. This architecture has an enormous ratio between the width and the thickness of the tape, typically ranging between 1,000 and 10,000. This very large aspect ratio has a detrimental effect on the AC losses, specifically the losses...
Prof.
Naoyuki Amemiya
(Kyoto University)
29/06/2015, 16:30
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Large magnetization of coated conductors is one of the most serious concerns of their applications to MRI or NMR magnets, because it deteriorate the uniformity and stability of the magnetic fields. As the counter measure against large magnetization, the striation of coated conductors was proposed, and its effect was demonstrated in small coils. Even if filaments (narrow conductor strips in a...
John Murphy
(University of dayton Research Institute), Dr
Timothy Haugan
(USAF)
29/06/2015, 16:45
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Long HTS tapes have been fabricated in a variety of formats for the purpose of reducing the sensitivity to AC magnetic fields, from both conducted AC and external fields. Some of the conductors have been made more resistant to AC losses by HTS film composition and many others have been based on geometric arrangements of the conductors, such as different filament patterns in striated tapes, and...
Arend Nijhuis
(University of Twente)
29/06/2015, 17:00
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
The performance during an operating plasma scenario of Nb3Sn Cable-in-Conduit Conductors (CICCs) designs envisaged for the ITER Central Solenoid has been analyzed with the code JackPot-ACDC. At present there is no experimental facility available to test the stability of the conductors under relevant pulsed plasma operating conditions. Only limited experimental data is existing that is suitable...
Prof.
Ted Collings
(MSE, OSU)
29/06/2015, 17:15
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
When exposed to a ramping magnetic field the Rutherford cable is the seat of coupling magnetization produced by interstrand coupling currents passing through the interstrand contact resistances (ICR) -- the strand crossover resistances, Rc, and the side-by-side (adjacent-strand) resistances, Ra. The coupling magnetization, is greatest when the applied field is normal to the cable’s surface in...
Philippe Masson
(University of Houston)
29/06/2015, 17:30
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Magnesium diboride conductors are considered for use on fully superconducting wind turbine generators and, as a results, being able to quantify the AC losses in MgB2 wound stators is paramount. AC losses were measured on several MgB2 conductors based on NiCu matrix material. The measurements were done calorimetrically at about 15 K and at applied magnetic fields up to 100 mT and frequencies up...
Francesco Grilli
(Karlsruhe Institute of Technology)
29/06/2015, 17:45
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
DC transmission using high temperature superconducting (HTS) coated conductors offers a promising solution to the globally growing demand for effective, reliable and economic transmission of green energy up to GW level over very long distances. The credible estimation of the losses and thereby the heat dissipation involved is highly essential for the rational design of practical HTS DC...
