Publications de Nicolas Frank Mounet

Impact of beam-coupling impedance on the Schottky spectrum of bunched beam

Tatiana Pieloni, Nicolas Frank Mounet, Christophe Emmanuel R. Lannoy

The Schottky monitors of the Large Hadron Collider (LHC) can be used for non-invasive beam diagnostics to estimate various bunch characteristics, such as tune, chromaticity, bunch profile or synchrotron frequency distribution. However, collective effects, ...

Iop Publishing Ltd2024

Expansion of the Materials Cloud 2D Database

Nicolas Frank Mounet, Nicola Marzari, Giovanni Pizzi, Marco Gibertini, Davide Campi

Two-dimensional(2D) materials are among the most promising candidatesfor beyond-silicon electronic, optoelectronic, and quantum computingapplications. Recently, their recognized importance sparked a pushto discover and characterize novel 2D materials. With ...

AMER CHEMICAL SOC2023

LHC Schottky Spectrum from Macro-Particle Simulations

Tatiana Pieloni, Nicolas Frank Mounet, Christophe Emmanuel R. Lannoy

We introduce a method for building Schottky spectra from macro-particle simulations performed with the PyHEADTAIL code, applied to LHC beam conditions. In this case, the use of a standard Fast Fourier Transform (FFT) algorithm to recover the spectral conte ...

JACoW Publishing2022

AiiDA 1.0, a scalable computational infrastructure for automated reproducible workflows and data provenance

Sebastiaan Philippe Huber, Nicolas Frank Mounet, Nicola Marzari, Fernando Gargiulo, Andrea Cepellotti, Giovanni Pizzi, Leonid Kahle, Aliaksandr Yakutovich, Andrius Merkys, Martin Uhrin, Snehal Pramod Kumbhar, Spyros Zoupanos, Boris Kozinsky, Christoph Leopold Talirz, Elsa Passaro, Conrad Johnston, Casper Welzel Andersen, Carl Simon Adorf, Francisco Fernando Ramirez

The ever-growing availability of computing power and the sustained development of advanced computational methods have contributed much to recent scientific progress. These developments present new challenges driven by the sheer amount of calculations and d ...

2020

A High-Throughput Computational Study Driven by the AiiDA Materials Informatics Framework and the PAULING FILE as Reference Database

Nicolas Frank Mounet, Nicola Marzari, Giovanni Pizzi, Martin Uhrin

Confronted with the explosion of computing power and the vast quantities of materials data thus produced, Gray proposed in 2009 the “Fourth Paradigm of Science: Data-Intensive Discovery through Data Exploration (eScience)" [Gray, J. (2009). The Fourth Para ...

Wiley-VCH2019

Relative Abundance of Z(2) Topological Order in Exfoliable Two-Dimensional Insulators

Nicolas Frank Mounet, Nicola Marzari, Marco Gibertini, Antimo Marrazzo, Davide Campi

Quantum spin Hall insulators make up a class of two-dimensional materials with a finite electronic band gap in the bulk and gapless helical edge states. In the presence of time-reversal symmetry, Z(2) topological order distinguishes the topological phase f ...

AMER CHEMICAL SOC2019

Prediction of a Large-Gap and Switchable Kane-Mele Quantum Spin Hall Insulator

Nicolas Frank Mounet, Nicola Marzari, Marco Gibertini, Antimo Marrazzo, Davide Campi

2018

Two-dimensional materials from high-throughput computational exfoliation of experimentally known compounds

Nicolas Frank Mounet, Nicola Marzari, Andrea Cepellotti, Giovanni Pizzi, Marco Gibertini, Andrius Merkys, Ivano Eligio Castelli, Antimo Marrazzo, Thibault Daniel Pierre Sohier, Davide Campi

2018

Precision and efficiency in solid-state pseudopotential calculations

Nicolas Frank Mounet, Nicola Marzari, Ivano Eligio Castelli, Gianluca Prandini, Antimo Marrazzo

Despite the enormous success and popularity of density-functional theory, systematic verification and validation studies are still limited in number and scope. Here, we propose a protocol to test publicly available pseudopotential libraries, based on sever ...

2018

Impedance simulations and measurements on the LHC collimators with embedded beam position monitors

Benoît Salvant, Nicolas Frank Mounet, Nicolò Biancacci

The LHC collimation system is a critical element for the safe operation of the LHC machine. The necessity of fast accurate positioning of the collimator's jaws, recently introduced the need to have button beam position monitors directly embedded in the jaw ...

Amer Physical Soc2017

Geometric beam coupling impedance of LHC secondary collimators

Benoît Salvant, Nicolas Frank Mounet, Alexej Grudiev

The High Luminosity LHC project is aimed at increasing the LHC luminosity by an order of magnitude. One of the key ingredients to achieve the luminosity goal is the beam intensity increase. In order to keep beam instabilities under control and to avoid exc ...

Elsevier Science Bv2016

Transverse mode coupling instability of colliding beams

Tatiana Pieloni, Xavier Buffat, Nicolas Frank Mounet

In high brightness circular colliders, coherent and incoherent beam dynamics are dominated by beam-beam interactions. It is generally assumed that the incoherent tune spread introduced by the beam-beam interactions is sufficiently large to cure any instabi ...

American Physical Society2014

The LHC Transverse Coupled-Bunch Instability

Nicolas Frank Mounet

In this thesis, the problem of the transverse coupled-bunch instabilities created by the Large Hadron Collider (LHC) beam-coupling impedance, that can possibly limit the machine operation, is addressed thanks to several new theories and tools. A rather com ...

EPFL2012

Comparison between laboratory measurements, simulations, and analytical predictions of the transverse wall impedance at low frequencies

Benoît Salvant, Nicolas Frank Mounet

The prediction of the transverse wall beam impedance at the first unstable betatron line (8kHz) of the CERN Large Hadron Collider (LHC) is of paramount importance for understanding and controlling the related coupled-bunch instabilities. Until now only nov ...

2009