Missions

The Laboratoire Leprince-Ringuet (LLR) is inviting applications for a two-years postdoctoral position within the CMS group, in the context of the “DRIFTS” project funded by the ANR. DRIFTS is a collaborative project between CEA/IRFU, CERN and LLR. It aims to demonstrate novel real-time trigger reconstruction architectures for future particle collider experiments, based on deep learning models distributed across multiple hardware processing stages. The mission of this position, based at LLR, will be to contribute to these developments in collaboration with the various project stakeholders. The future high-granularity endcap calorimeter of CMS (HGCAL) will serve as a platform to evaluate these developments using existing hardware components.

Activités

- Contribute to the simulation of a high-granular calorimeter with Geant4 as well as its readout and trigger electronic chain.
- Develop and optimize deep learning models, trained for the reconstruction of events generated with this simulation framework and targeting their application on a distributed trigger system based on several processing stages.

Compétences

- Holding a doctoral degree in particle physics
- Experience in C++ and Python programming is desired
- Experience in training and using Machine Learning models is desired
- Experience with detector (Geant4) and electronics simulation would be beneficial
- Experience with FPGA firmware development and familiarity with trigger systems would be beneficial

Contexte de travail

The LLR is a laboratory of the CNRS/IN2P3 and the École Polytechnique, one of the grandes écoles of the Institut Polytechnique de Paris (IPP) specialized in science and engineering. The LLR is dedicated to fundamental research in high-energy particle physics and astroparticle physics. Its members work on the LHCb and CMS experiments at the LHC, the T2K, Super-K and Hyper-K neutrino experiments in Japan, and in FERMI, HESS and CTA for gamma-ray astronomy.
The CMS group of LLR is a founding member of the CMS Collaboration and is composed of about 30 members. It has designed, built, and is responsible for the operation of the Level-1 (L1) trigger for the electromagnetic calorimeter (ECAL). It has also designed the calorimeter mechanics and contributed to the front-end readout electronics. It has major involvement in the reconstruction and identification of electrons, photons and tau leptons, and contributed to the development of the Particle Flow event reconstruction. It is among the leading protagonists within the CMS Collaboration in electroweak, heavy ions, and Higgs physics.
The group is also strongly involved in the development of the future high-granularity endcap calorimeter (HGCAL) for the high-luminosity phase of the LHC, in particular on its mechanical design, on the generation of the L1 trigger primitives, and on the development of offline reconstruction algorithms. In addition, it is participating in the assembly of the detector at CERN.
The position will be based at the LLR in Palaiseau (near Paris) with close collaboration with colleagues from CEA/IRFU and from CERN.

Contraintes et risques

Travel within France and abroad, particularly to CERN (Geneva, Switzerland), will be required.