Publication

Validation and Application of Hysteresis Loss Model for HTS Stacks and Conductors for Fusion Applications

Publications associées (43)

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Ruthenocuprates RuSr2(Eu,Ce)(2)Cu2O10-y: Intrinsic magnetic multilayers

Giorgio Margaritondo, Davor Pavuna, Ivica Zivkovic, Helmuth Berger

We report ac susceptibility data on RuSr2(Eu,Ce)(2)Cu2O10-y (Ru-1222, Ce content x=0.5 and 1.0), RuSr2GdCu2O8 (Ru-1212), and SrRuO3. Both Ru-1222 (x=0.5, 1.0) sample types exhibit unexpected magnetic dynamics in low magnetic fields: logarithmic time relaxa ...

2002

Evidence for two coupled subsystems in the superconducting state of La2-xSrxCuO4

Davor Pavuna, Mike Abrecht

We used a pump-probe technique to measure the transient change of optical reflectivity of both La2-xSrxCuO4, of various dopings, and slightly underdoped YBa2Cu3O7-x and NdBa2Cu3O7-x thin films. For the La2-xSrxCuO4 films, our data demonstrate the coexisten ...

2001

Hysteresis Modelling of High Temperature Superconductors

Marten Sjöström

The present dissertation considers the capabilities, limitations and possible extensions of modelling the hysteresis that is exhibited by type-II superconductors, especially those with high critical temperature. Superconductors of type-II, including high t ...

2001

Hysteresis modelling of high temperature superconductors

Marten Sjöström

EPFL2001

Development of a 20 kA high temperature superconductor current lead

Martin Vogel

The reduction of static heat load in superconducting magnet systems is of great importance because of reduction of refrigeration power and operational costs. The major elements that determine the heat load are the current leads. The use of high temperature ...

2001

Possibilities and limitations of using Preisach model for hysteresis in superconductors

Marten Sjöström

Superconductors of type-II are partially penetrated by magnetic flux, where the pinning of flux tubes constitutes a memory that gives rise to a hysteresis. However, the hysteresis gradually disappears when a transport current approaches the critical curren ...

2001

Disorder effects in cuprates

Giorgio Margaritondo, László Forró, Marco Grioni, Davor Pavuna, Helmuth Berger

We report on ah-plane resistivity (rho) and angle-reserved photoemission (ARPES) spectra for Bi2Sr2CaCu2O8+x single crystals irradiated with neutrons or electron-beam irradiation. Both the normal and superconducting states were measured with angle-resolved ...

Spie-Int Society Optical Engineering2000

Electroceramic materials

Nava Setter

Electroceramics research is driven by technology and device applications. This growing field includes a vast number of magnetic, dielectric, ionically conducting, semiconducting, and superconducting ceramics used in domains as diverse as transportation, in ...

2000

Status of the development program of a 60 kA HTSC current lead for the ITER toroidal field coils

Martin Vogel

In the frame of the European Fusion Technology Programme, FZK Karlsruhe and CRPP Villigen have started a development program for design and construction of a 60 kA current lead for the ITER Toroidal Field Coils using High Temperature Superconductors. The t ...

1999

Superconductors for fusion magnets: realizations, prototypes and running projects

Pierluigi Bruzzone

This paper gives a review of the application of superconductivity to nuclear fusion magnets. For each machine, a short description emphasizes the special features of the winding technology and conductor design. A selection of demonstration magnets is prese ...

1997