Marina Béguin

Experience

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  Airbus Helicopters

  Jun 2014 - Jul 2014

  Internship in the Airbus Helicopters company

  Observation of the Quality controller job on the Tiger Helicopter manufacturing chain

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  CERN

  Jun 2015 - Aug 2015

  Internship in the CMS collaboration

  The luminosity increase planned for the run 2 of the LHC (January 2018- December 2019) required an improvement of the CMS tracker modules. The internship mission was to took part on the production and to carry out several tests on the new assembled pixel modules.- Improvement of the manufacturing tools accuracy- Test of the new modules: production tests to check the quality of the production process and module qualification tests (thermal cycling and X-ray)- Control of the proper functioning and improvement of the test equipment Show less

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  CEA Saclay

  Mar 2016 - Aug 2016

  Internship at CERN in the FCC collaboration

  The aim of this internship was to design and optimise a detector for the FCC-ee project, a circular electron-positron collider for the post LHC physics. The measurement of the W mass at the W-pair production threshold was chosen as a benchmark, with the objective to reach a total unprecedented uncertainty of 1 MeV.

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  CERN

  Oct 2016 - Dec 2019

  Subject: Calorimetry and W mass measurement for future experimentsMy analysis addressed the calorimetry of two future experiments:- the high-granularity endcap calorimeter (HGCal) to be installed in the phase-2 upgrade of the CMS detector for the high-luminosity phase of the LHC;- the complete calorimetric system of a detector for the FCC-ee project, a future electron-positron collider in a 100 km ring, for the post-LHC physics.Using simulation, my objective was to optimise their performance in terms of particle identification and reconstruction. For the CMS part, I implemented in C++ a comprehensive, fast and flexible simulation tool that makes it possible to easily test and understand the HGCal characteristics. I was also involved in the improvement of the Geant4-based full simulation tool for the CMS detector (CMSSW) in order to optimise the HGCal jets resolution and the reconstruction of the missing energy. In a second step, the W boson was used to add constraints on the HGCal parameters and to identify the requirements to measure its mass with the best possible accuracy. In this study, I used a software using the Machine Learning Tensorflow library to improve the recoil reconstruction, key parameter in the W mass reconstruction in proton-proton collisions. The W boson mass was also used as reference for the study of a detector for the FCC-ee. With a simulation tool implemented in Python, I demonstrated that the FCC-ee current calorimetry enable the measurement of the W boson with an unprecedented statistical uncertainty. Show less

  • PhD candidate in the FCC and CMS collaborations

    Feb 2017 - Dec 2019

  • Internship in the ATLAS collaboration

    Oct 2016 - Jan 2017
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  CERN

  Mar 2020 - Jun 2020

  Fellow in the FCC collaboration

  Readout Electrode Design and Performance Optimization of for the Future Circular Collider (FCC) liquid Argon calorimeter

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  ETH Zürich

  Jul 2020 - now

  I developed a 3D image reconstruction software in C++ for the analysis of PET images, improving reconstruction accuracy without relying on external data typically used for attenuation and photon scatter corrections. This innovative approach optimizes the efficiency of analyses in a medical context.I integrated machine learning techniques, particularly Gaussian Splatting, to improve photon attenuation correction and optimize the software's performance.As a co-manager of the project, I led a clinical trial at CHUV, coordinating a multidisciplinary team, ensuring compliance with regulatory requirements, and drafting the necessary documentation for Swiss authorities.My work has been presented at several international conferences and seminars. Show less

  • Postdoctoral Researcher at the ETH Computer Vision Lab

    Jan 2025 - now

  • Postdoctoral researcher

    Jul 2020 - Dec 2024