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Rainer Wesche

Cette personne a quitté l’EPFL

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Publications associées (93)

Page 3 sur 5

DC performances of ITER NbTi conductors: Models vs. measurements

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

Within the R&D program on the International Thermonuclear Experimental Reactor (ITER) Poloidal Field (PF) coils, a full size conductor sample was tested in the SULTAN facility (CRPP Villigen, Switzerland). This sample is composed of two straight ITER-like ...

IEEE Institute of Electrical and Electronics Engineers2005

Performance evolution of 60kA HTS cable prototypes in the EDIPO test facility

Pierluigi Bruzzone, Kamil Sedlák, Davide Uglietti, Boris Stepanov, Rainer Wesche

During the first test campaign of the 60 kA HTS cable prototypes in the EDIPO test facility, the feasibility of a novel HTS fusion cable concept proposed at the EPFL Swiss Plasma Center (SPC) was successfully demonstrated. While the measured DC performance ...

IOP Publishing Ltd2016

High temperature superconductors for the ITER magnet system and beyond

Rainer Wesche

The use of high temperature superconductor (HTS) materials in future fusion machines could increase the efficiency drastically, but strong boundary conditions exist. To outline the prospects, challenges and problems, first the benefit of using HTS material ...

2005

Analyses and implications of V-I characteristic of PF insert conductor sample

Pierluigi Bruzzone, Rainer Wesche

Two short lengths of the full-size NbTi cable-in-conduit (CIC) conductor used to fabricate the ITER poloidal field coil insert were tested in the SULTAN facility. The two investigated conductors, otherwise identical, are distinguished only by the presence ...

2005

Fabrication Trials of Round Strands Composed of Coated Conductor Tapes

Pierluigi Bruzzone, Rainer Wesche, Davide Uglietti

Various techniques have been proposed in order to assemble coated conductor tapes into high current strands. In this work, the preparation of high current capacity round strands starting from industrial coated conductors has been investigated. Round, twist ...

IEEE Institute of Electrical and Electronics Engineers2013

A design proposal for the European DEMO superconducting bus bars and current leads

Pierluigi Bruzzone, Rainer Wesche, Kamil Sedlák, Xabier Sarasola Martin, Roberto Guarino

The integration of the feeder system in a tokamak involves complex engineering, manufacturing and logistics issues. Therefore, within the pre-conceptual design activities of the European DEMO fusion reactor, it is important to provide a preliminary sizing ...

2021

Design and R&D for the DEMO Toroidal Field Coils Based on Nb3Sn React and Wind Method

Pierluigi Bruzzone, Boris Stepanov, Rainer Wesche, Kamil Sedlák

In 2013, the Swiss Plasma Center proposed a Toroidal Field (TF) layout for the DEMO-EUROfusion tokamak, based on a graded winding made of layers of Nb3Sn (react&wind) and NbTi conductors. The R&D effort led in 2015 to a full size prototype conductor tested ...

IEEE Institute of Electrical and Electronics Engineers2017

Results of the Test of Industrially Manufactured HTS Current Leads With Novel Design Features

Pierluigi Bruzzone, Rainer Wesche, Stephen Alfred March

In the framework of a collaboration, CRPP (Centre de Recherches en Physique des Plasmas) and WEKA AG have developed high-temperature superconductor (HTS) current leads for currents in the range of 3 to 30 kA, which are suitable for industrial fabrication. ...

IEEE Institute of Electrical and Electronics Engineers2014

The EDIPO Project: Status and Outlook

Pierluigi Bruzzone, Boris Stepanov, Rainer Wesche, Stephen Alfred March

The aim of this paper is to present an up to date review of the status of the European DIPOle (EDIPO) project-whose objective is to build a new facility to perform both DC and AC tests of large force flow superconductor samples in high magnetic background ...

IEEE-Inst Electrical Electronics Engineers Inc2012

Test results of the 18 kA EDIPO HTS current leads

Pierluigi Bruzzone, Rainer Wesche, Stephen Alfred March, Markus Jenni, Manuel Holenstein

For the new test facility EDIPO (European DIPOle), to be hosted by CRPP, two 18 kA HIS current leads were manufactured and successfully tested. The HTS module, made of AgMgAu/Bi-2223 tapes, is cooled only by heat conduction to the cold end, while the coppe ...

2011

Commissioning of the Main Coil of the EDIPO Test Facility

Pierluigi Bruzzone, Davide Uglietti, Markus Jenni, Boris Stepanov, Rainer Wesche, Stephen Alfred March

The EDIPO test facility is erected at CRPP Villigen with the aim of providing a flexible, high field test bed for high current force flow superconductors. The EDIPO main coil is a tilted-head race-track pair wound by a graded Nb3Sn cable-in-conduit conduct ...

IEEE Institute of Electrical and Electronics Engineers2014

Parametric study of the TF coil design for the European DEMO

Pierluigi Bruzzone, Rainer Wesche, Kamil Sedlák, Xabier Sarasola Martin, Roberto Guarino

In addition to a reduced number of feeders, which would simplify their integration in the cryostat of the tokamak, the present study considers the possibility to reduce the voltage during safety discharge of the toroidal field (TF) coils. A lowered dischar ...

2021

Overview of progress on the EU DEMO magnet system design

Pierluigi Bruzzone, Kamil Sedlák, Boris Stepanov, Rainer Wesche

The DEMO reactor is expected to be the first application of fusion for electricity generation in the near future. To this aim conceptual design activities are progressing in Europe (EU) under the lead of the EUROfusion Consortium in order to drive on the d ...

IEEE Institute of Electrical and Electronics Engineers2016

Progress in the Design of a Hybrid HTS-Nb3Sn-NbTi Central Solenoid for the EU DEMO

Pierluigi Bruzzone, Rainer Wesche, Kamil Sedlák, Davide Uglietti, Xabier Sarasola Martin

State-of-the-art high field solenoids make use of hybrid designs exploiting the superior high field performance of High Temperature Superconductors (HTS) in the innermost region. The benefits of a hybrid Central Solenoid in a pulsed tokamak like the EU DEM ...

IEEE Institute of Electrical and Electronics Engineers2020

Test results of a small size CICC with advanced Nb3Sn strands

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

In the scope of the design activities for a 12.5 T dipole magnet, a short length of cable-in-conduit conductor (CICC) with steel jacket was prepared in spring 2005 as a pre-prototype of the high field dipole conductor. The small, rectangular conductor uses ...

IEEE Institute of Electrical and Electronics Engineers2006

Comparing Dynamics: Deep Neural Networks versus Glassy Systems

Rainer Wesche, Mario Geiger, Stefano Spigler, Levent Dogus Sagun

We analyze numerically the training dynamics of deep neural networks (DNN) by using methods developed in statistical physics of glassy systems. The two main issues we address are the complexity of the loss-landscape and of the dynamics within it, and to wh ...

2018

Qualification tests for ITER TF conductors in SULTAN

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

From February 2007 to May 2008, 18 short length conductor sections have been tested in SULTAN for design verification and manufacturer qualification of the ITER Toroidal Field (TF) conductor. The test program is focussed on the current sharing temperature, ...

Elsevier2009

Superconductors for fusion: a roadmap

Pierluigi Bruzzone, Rainer Wesche, Kamil Sedlák, Nikolay Bykovskiy

With the first tokamak designed for full nuclear operation now well into final assembly (ITER), and a major new research tokamak starting commissioning (JT60SA), nuclear fusion is becoming a mainstream potential energy source for the future. A critical par ...

IOP Publishing Ltd2021

Test Results of Three Poloidal Field Superconducting Samples in SULTAN

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

Superconductors for the ITER Poloidal Field Coils are large cable-in-conduit conductors (CICC) made of NbTi strands encased in a round-in-square stainless steel jacket. Three prototype conductor sections for poloidal field coils PF1/6, PF2/3/4 and PF5 have ...

IEEE-Inst Electrical Electronics Engineers Inc2012

Effect of conduit material on CiCC performance under high cycling loads

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

Recent International Thermonuclear Experimental Reactor (ITER) Model Coils and tests on Nb-3 So Cable in Conduit Conductors (CICC) showed a significant and unexpected increase in the broadness of the transition to the normal state, resulting in degradation ...

IEEE Institute of Electrical and Electronics Engineers2005