Tatiana Pieloni

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IMPACT OF DIPOLE QUADRUPOLAR ERRORS IN FCC-ee

Tatiana Pieloni, Mike Seidel, Léon Van Riesen-Haupt, Tomas Rubin

FCC-ee performance is challenged by magnetic errors and imperfections. Magnetic design simulations predict a systematic quadrupolar component in the arc dipoles significantly impacting the machine optics. This paper studies the impact of this component in ...

IOP Publishing2024

Optimizing Dynamic Aperture Studies with Active Learning

Tatiana Pieloni, Ekaterina Krymova, Mike Seidel, Davide Di Croce, Massimo Giovannozzi

Dynamic aperture is an important concept for the study of non-linear beam dynamics in circular accelerators. It describes the extent of the phase-space region where a particle's motion remains bounded over a given number of turns. Understanding the feature ...

Iop Publishing Ltd2024

Impact of beam-beam effects on absolute luminosity calibrations at the CERN Large Hadron Collider

Tatiana Pieloni, Claudia Tambasco

At the Large Hadron Collider (LHC), absolute luminosity calibrations obtained by the van der Meer (vdM) method are affected by the mutual electromagnetic interaction of the two beams. The colliding bunches experience relative orbit shifts, as well as optic ...

Springer2024

Multiturn simulation of radiative Bhabha scattering in the equivalent photon approximation

Tatiana Pieloni, Mike Seidel

In this paper, we present a Monte Carlo event generator for radiative Bhabha scattering, based on the method of equivalent photons, and optimized for multiturn tracking simulations in the xsuite framework. We demonstrate the accuracy of the event generator ...

2024

FIRST FCC-ee LATTICE DESIGNS WITH NESTED MAGNETS

Tatiana Pieloni, Mike Seidel, Léon Van Riesen-Haupt

The Future Circular Electron-Positron Collider (FCC-ee) represents a cutting-edge particle physics facility designed to further investigate the 𝑍 0 , W± and Higgs boson in addition to the top quark. The implementation of Nested Magnets (NMs) in the FCC-ee ...

JACoW2024

Exploring Fcc-ee Optics Designs with Combined Function Magnets

Tatiana Pieloni, Mike Seidel, Léon Van Riesen-Haupt

The FCC-ee project takes a step forward towards the discovery of new physical phenomena beyond the frontier of the standard model, by aiming at unprecedented center of mass energies and luminosities in a double-ring lepton collider. In order to explore pot ...

2024

Collimation simulations for the FCC-ee

Tatiana Pieloni, Giovanni Iadarola, Milica Rakic, Bruce Roderik, Guillaume Clément Broggi, Félix Simon Carlier

The collimation system of the Future Circular Collider, operating with leptons (FCC-ee), must protect not only the experiments against backgrounds, but also the machine itself from beam losses. With a 17.8 MJ stored energy of the electron and positron beam ...

Iop Publishing Ltd2024

Data-driven modeling of beam loss in the LHC

Tatiana Pieloni, Michael Schenk, Ekaterina Krymova, Loïc Thomas Davies Coyle

In the Large Hadron Collider, the beam losses are continuously measured for machine protection. By design, most of the particle losses occur in the collimation system, where the particles with high oscilla-tion amplitudes or large momentum error are scrape ...

FRONTIERS MEDIA SA2023

STATISTICAL PROPERTIES OF SCHOTTKY SPECTRA

Tatiana Pieloni

Schottky signals are used for non-invasive beam diagnostics as they contain information on various beam and machine parameters. The instantaneous Schottky signal is, however, only a single realisation of a random process, implicitly depending on the discre ...

JACoW Publishing2023

EFFECT OF LONGITUDINAL BEAM-COUPLING IMPEDANCE ON THE SCHOTTKY SPECTRUM OF BUNCHED BEAMS

Tatiana Pieloni

Schottky spectra can be strongly affected by collective effects, in particular those arising from beam-coupling impedance when a large number of bunch charges are involved. In such conditions, the direct interpretation of the measured spectra becomes diffi ...

JACoW Publishing2023

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