Publications by Francesco Romano

"Design and first tests of the trapped electrons experiment T- REX" - Rev. Sci. Instrum. 95, 103511 (2024)

This data are the raw files from the experiments with T-REX and the respective .m file to load, convert and plot them. This is currents, voltages, magnetic fields. #### Dataset for the publication "Design and first tests of the trapped electrons experiment ...

Zenodo2025

Electron trapping in gyrotron electron guns: Validation of the FENNECS code with the T-REX experiment

Timothy Goodman, Stefano Alberti, Jean-Philippe Hogge, Joaquim Loizu Cisquella, Mario Ludovico Podesta, Jérémy Genoud, Falk Hans Braunmüller, Francesco Romano, Guillaume Michel Le Bars

Gyrotrons are essential devices for the development of nuclear fusion, but their design and reliable operation still present numerous challenges. In particular, certain gyrotrons encounter issues related to trapped electron clouds in the magnetron injectio ...

AIP Publishing2025

Design and First Tests of the Trapped Electrons Experiment T-REX

Stefano Alberti, Joaquim Loizu Cisquella, Damien Fasel, Jérémy Genoud, Steve Couturier, Severino Antonioni, Francesco Romano

Gyrotrons are essential for electron cyclotron resonance heating (ECRH) in fusion reactors, making efficient operation crucial for advancing fusion energy. Past experiments revealed instability issues due to trapped electrons in the magnetron injection gun ...

AIP Publishing2024

FENNECS: a novel particle-in-cell code for simulating the formation of magnetized non-neutral plasmas trapped by electrodes of complex geometries

Stefano Alberti, Jean-Philippe Hogge, Joaquim Loizu Cisquella, Jérémy Genoud, Francesco Romano, Guillaume Michel Le Bars

This paper presents the new 2D electrostatic particle -in -cell code FENNECS developed to study the formation of magnetized non -neutral plasmas in geometries with azimuthal symmetry. This code has been developed in the domain of gyrotron electron gun desi ...

2024

First self-consistent simulations of trapped electron clouds in a gyrotron gun and comparison with experiments

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis, Joaquim Loizu Cisquella, Jérémy Genoud, Francesco Romano

We report on the initial validation of the novel code FENNECS, which simulates the spontaneous formation of trapped electron clouds in coaxial geometries with strong externally applied azimuthal flows and in the presence of a residual neutral gas. For this ...

American Institute of Physics (AIP)2023

Self-consistent formation and steady-state characterization of trapped high-energy electron clouds in the presence of a neutral gas background

Stefano Alberti, Jean-Philippe Hogge, Joaquim Loizu Cisquella, Francesco Romano, Guillaume Michel Le Bars

This study considers the self-consistent formation and dynamics of electron clouds interacting with a background neutral gas through elastic and inelastic (ionization) collisions in coaxial geometries similar to gyrotron electron guns. These clouds remain ...

American Institute of Physics (AIP)2022

Design of an intake and a thruster for an atmosphere-breathing electric propulsion system

Francesco Romano, Thomas Binderup Jensen

Challenging space missions include those at very low altitudes, where the atmosphere is the source of aerodynamic drag on the spacecraft, that finally defines the mission's lifetime, unless a way to compensate for it is provided. This environment is named ...

2022