Publications by Davide Uglietti

DC and quench performance assessment from the EUROfusion HTS Quench Experiment campaign and projection to magnet operation

Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák, Nikolay Bykovskiy

Seven different high current conductors for fusion applications, made of High Temperature Superconducting stacked tapes, have been successfully tested in the Quench Experiment campaign supported by EUROfusion and carried out in SULTAN. The aim of this exte ...

2025

A compact frozen-spin trap for the search for the electric dipole moment of the muon

Davide Uglietti

Electric dipole moments (EDM) of fundamental particles inherently violate time-reversal (T) and the combined charge-conjugation and parity symmetry (CP). We aim to measure the EDM of the muon using the frozen-spin technique within a compact storage trap. T ...

Springer Science and Business Media LLC2025

Thermal-hydraulic analysis of the CORCⓇ conductor for the DEMO CS coil

Davide Uglietti

Conductors using High Temperature Superconductor (HTS) tapes are considered as a very promising solution for future high-field fusion magnets. Various HTS cable concepts, such as e.g. twisted stack cable, cross-conductor (CroCo), Roebel assembled coated co ...

2025

Quench Detection and Temperature Measurement With Fiber Optic Sensors

Davide Uglietti, Kamil Sedlák, Christoph Müller

For the EU DEMO conductor testing, a temperature sensor based on Fiber Bragg Grating (FBG) optical fiber is studied at the EPFL Swiss Plasma Center. The SULTAN test facility has been upgraded to use fiber optic sensor for temperature monitoring and quench ...

IEEE Institute of Electrical and Electronics Engineers2024

Examination of commercial ceramic coatings for the electrical insulation of Bi-2212 wire

Andrea Testino, Davide Uglietti, Robert Sobota

In the last twenty years, a number of studies have been dedicated to the development of thin ceramic coating for the electrical insulation of Ag-sheathed Bi-2212 wires. Instead of preparing a coating by mixing different compounds in house, this technical n ...

2023

Impact of Hysteresis Losses in Hybrid (HTS-LTS) Coils for Fusion Applications

Davide Uglietti

Several conductor designs featuring High Temperature Superconducting (HTS) stacked tapes for fusion coils are being proposed. These conductors are planned to operate in time-varying magnetic field and current; thus, the estimation of AC losses is fundament ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023

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

Co-Wound Superconducting Wire for Quench Detection in Fusion Magnets

Pierluigi Bruzzone, Davide Uglietti, Kamil Sedlák, Nikolay Bykovskiy

High temperature superconducting (HTS) materials are widely utilized in various design proposals for fusion magnets, resulting in enhanced performance of the machines compared to the past. However, a reliable quench detection in HTS conductors remains an o ...

IEEE Institute of Electrical and Electronics Engineers2022

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

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

Design Study of a 50-kA React-and-Wind Bi-2212 Cable for Fusion Magnet

Davide Uglietti

In the last few years, the current density of Bi-2212 wires has been greatly improved by filament densify technologies. One further step toward applications in fusion magnets is to design a high current cable, which must overcome the drawbacks of Bi-2212 w ...

IEEE Institute of Electrical and Electronics Engineers2020

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

AMS-100: The next generation magnetic spectrometer in space - An international science platform for physics and astrophysics at Lagrange point 2

Thomas Günther Bretz, Davide Uglietti

The next generation magnetic spectrometer in space, AMS-100, is designed to have a geometrical acceptance of 100 m(2) sr and to be operated for at least ten years at the Sun-Earth Lagrange Point 2. Compared to existing experiments, it will improve the sens ...

2019

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

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

Davide Uglietti

High temperature superconducting (HTS) materials have the potential to generate a magnetic field beyond the level obtainable with low temperature superconducting (LTS) materials. This review reports on past and present R&D on HTS cables and conductors for ...

2019

Preliminary Tests of Soldered and Diffusion-Bonded Splices Between Nb3Sn Rutherford Cables for Graded High-Field Accelerator Magnets

Pierluigi Bruzzone, Davide Uglietti, Mithlesh Kumar, Vincenzo D'Auria

High-field accelerator magnets of the next generation will require coil grading in order to decrease the amount of superconductor and hence the magnet cost. The joints between Nb3Sn conductor grades must have low electrical resistance (

IEEE Institute of Electrical and Electronics Engineers2019

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 ...

ELSEVIER SCIENCE SA2019

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

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

IEEE Institute of Electrical and Electronics Engineers2018