Publications by Rainer Wesche | EPFL Graph Search

The magnet feeders for the European DEMO fusion reactor: Conceptual design and recent advances

Rainer Wesche, Frédéric Michel, Roberto Guarino

The magnet feeders are part of the critical systems of a fusion reactor since they represent the interface between the in-cryostat components at 4.5 K and the room-temperature cryogenic plant and power supply. The European DEMO tokamak foresees 16 toroidal ...

2024

Technical and economic feasibility study of high-current HTS bus bars for fusion reactors

Rainer Wesche, Kamil Sedlák, Roberto Guarino

In this study, we present a technical and economic assessment of high-current HTS bus bars for primary use in fusion reactors. Our objective is to verify the technical feasibility of such conductors and, for this purpose, we carry out a conceptual design o ...

Elsevier2022

Assessment of the Thermal-Hydraulic Performance of the European DEMO NbTi Bus Bars

Rainer Wesche, Kamil Sedlák, Roberto Guarino

We present a numerical assessment of the thermal-hydraulic performance of the NbTi bus bars designed for the European DEMO. We consider the CS, TF and PF bus bars, as well as two alternative TF options for high-current operations. The main sources of stati ...

IEEE Institute of Electrical and Electronics Engineers2022

The DEMO magnet system - Status and future challenges

Rainer Wesche, Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák, Roberto Guarino, Mithlesh Kumar, Vincenzo D'Auria, Ortensia Dicuonzo, Chiara Frittitta, Federica Demattè

We present the pre-concept design of the European DEMO Magnet System, which has successfully passed the DEMO plant-level gate review in 2020. The main design input parameters originate from the so-called DEMO 2018 baseline, which was produced using the PRO ...

2022

Parametric study of the TF coil design for the European DEMO

Rainer Wesche, Pierluigi Bruzzone, Kamil Sedlák, 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

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

Rainer Wesche, Pierluigi Bruzzone, Kamil Sedlák, 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

Superconductors for fusion: a roadmap

Rainer Wesche, Pierluigi Bruzzone, 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 ...

2021

Upgrade and Commissioning of the SULTAN Facility to Host Quench Experiments on HTS High Current Conductors

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

High Temperature Superconductors (HTS) are promising materials for future fusion magnets. One of HTS conductors' main issues is the quench protection: the quench develops much slower than in LTS, delaying the quench detection by voltage monitoring and caus ...

IEEE Institute of Electrical and Electronics Engineers2021

Estimation of performance of Nb3Sn CICC with thermal strain distribution

Rainer Wesche, Pierluigi Bruzzone, Kamil Sedlák

In the last few years, the critical temperature (Tc) of several ITER cable-in-conduit conductors (CICC) was determined by magnetization measurements at zero current. The distribution of the critical temperatures (Tc), caused by variation of strain in the N ...

2020

Non-twisted stacks of coated conductors for magnets: Analysis of inductance and AC losses

Rainer Wesche, Francesco Grilli, Davide Uglietti

Almost all present High Temperature Superconducting (HTS) cable designs for magnets are based on twisted or transposed concepts that were developed for Low Temperature Superconducting (LTS) cables. However, requirements for LTS materials (like filament twi ...

2020

Advance in the conceptual design of the European DEMO magnet system

Rainer Wesche, Pierluigi Bruzzone, Boris Stepanov, Davide Uglietti, Elena Gaio, Kamil Sedlák, Roberto Guarino, Mithlesh Kumar, Vincenzo D'Auria, Ortensia Dicuonzo, Chiara Frittitta, Alberto Ferro

The European DEMO, i.e. the demonstration fusion power plant designed in the framework of the Roadmap to Fusion Electricity by the EUROfusion Consortium, is approaching the end of the pre-conceptual design phase, to be accomplished with a Gate Review in 20 ...

2020

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

Rainer Wesche, Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák

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

Quench Simulation of REBCO Cable-in-Conduit Conductor With Twisted Stacked-Tape Cable

Rainer Wesche, Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák

Quench protection is a critical issue for magnet using high-temperature superconducting (HTS) materials such as REBCO. For cable-in-conduit conductor (CICC) with twisted REBCO tapes, which is considered for high-current HTS conductor for fusion magnet, the ...

IEEE Institute of Electrical and Electronics Engineers2020

DC Test Results of the DEMO TF React&Wind Conductor Prototype No. 2

Rainer Wesche, Pierluigi Bruzzone, Boris Stepanov, Davide Uglietti, Kamil Sedlák, Vincenzo D'Auria

2019

Hybrid HTS-Nb3Sn-NbTi DEMO CS coil design optimized for maximum magnetic flux generation

Rainer Wesche, Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák, Ortensia Dicuonzo

The present work is performed within the framework of the EUROfusion DEMO project. Previously, it was demonstrated that for a maintained magnetic flux the use of HTS conductors at highest magnetic field in a layer-wound CS coil would allow the reduction of ...

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Rainer Wesche

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The magnet feeders for the European DEMO fusion reactor: Conceptual design and recent advances

Technical and economic feasibility study of high-current HTS bus bars for fusion reactors

Assessment of the Thermal-Hydraulic Performance of the European DEMO NbTi Bus Bars

The DEMO magnet system - Status and future challenges

Parametric study of the TF coil design for the European DEMO

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

Superconductors for fusion: a roadmap

Upgrade and Commissioning of the SULTAN Facility to Host Quench Experiments on HTS High Current Conductors

Estimation of performance of Nb3Sn CICC with thermal strain distribution

Non-twisted stacks of coated conductors for magnets: Analysis of inductance and AC losses

Advance in the conceptual design of the European DEMO magnet system

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

Quench Simulation of REBCO Cable-in-Conduit Conductor With Twisted Stacked-Tape Cable

DC Test Results of the DEMO TF React&Wind Conductor Prototype No. 2

Hybrid HTS-Nb3Sn-NbTi DEMO CS coil design optimized for maximum magnetic flux generation

A Prototype Conductor by React'WIND Method for the EUROfusion DEMO TF Coils

AC Loss in HTS Fusion Cables: Measurements, Modeling, and Scaling Laws

Damage Investigations in the HTS Cable Prototype After the Cycling Test in EDIPO

DEMO Central Solenoid Design Based on the Use of HTS Sections at Highest Magnetic Field

Progressing in cable-in-conduit for fusion magnets: from ITER to low cost, high performance DEMO