Missions

The LHCb group of Laboratoire De Physique Des 2 Infinite Irène Joliot-Curie (IJCLab) in Orsay opens applications for a post-doctoral position to work on the development of high-performance real-time reconstruction with a focus on the LHCb calorimeter upgrade.

The IJCLab LHCb group participates enthusiastically in detector development, and is currently heavily involved in the development, maintenance, and operation of LHCb's electromagnetic calorimeter, as well as the design of its future upgrade. The group is also actively working on LHCb's real-time analysis system and have a large interest in AI and neural-network based reconstruction methods.

The LHCb electromagnetic calorimeter (ECAL) is a critical element of the LHCb experiment, enabling the reconstruction of electrons and photons that are needed in many key physics measurements. In order to maintain its current efficiency and momentum resolution in the challenging conditions of High-Luminosity LHC, the ECAL is in the process of a major upgrade. A key aspect of the ECAL upgrade, PicoCal, will be the introduction of precise time measurement with 15 ps resolution at high energies. Under this new paradigm, the calorimeter read-out chain and real-time (trigger) reconstruction need to be revisited, in order to ensure the maximal physics outcome. This work will be a collaborative effort, bringing together a multidisciplinary team with expertise spanning physics, electronics and real-time computing.

Activités

The successful candidates are expected to make a significant contribution to the development of the real-time reconstruction for PicoCal. A particular focus will be the development and benchmarking of AI- or ML-based clustering algorithms, as well as their integration for heterogeneous architectures, such as GPUs and FPGAs. If interested to do so, the successful candidates may also participate in physics analyses with a fraction of their time to be decided together with the hiring institutes.

Compétences

Candidates must have completed a PhD in either particle physics or computer science by the time of the starting date. To qualify you should have strong technical skills and enjoy solving computing as well as physics problems.

Contexte de travail

These positions are funded by the ODISSEE project, an infrastructure grant for the development of AI-based cross-experiment real-time processing solutions. Other participants in ODISSEE include French LHCb groups CPPM and LPNHE, French and Dutch teams on the SKA Observatory, and industry partners specialising in real-time artificial intelligence solutions. The successful applicants will have the opportunity to collaborate with a wide range of participating partners and develop their professional networks and skillsets accordingly.
The Irène Joliot-Curie Physics Laboratory of 2 Infinities (IJCLab) is a UMR under the supervision of the CNRS (IN2P3), the University of Paris-Saclay and the University of Paris is located on the campus of the University of Paris -Saclay in Orsay. The laboratory is located on the campus of the Université Paris-Sud, Université Paris-Saclay in Orsay. The campus is located 20 km south of Paris and easily accessible by RER in 35 minutes.
IJCLab was born in 2020 from the merger of five units (CSNSM, IMNC, IPN, LAL, LPT). The staff is made up of nearly 560 permanent (340 engineers, technicians and administrators and 220 researchers and teacher-researchers) and approximately 200 non-permanent including 120 doctoral students. The research themes of the laboratory are nuclear physics, high energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy and the environment and health. IJCLab has very significant technical capacities (around 280 IT) in all the major fields required to design, develop / implement the experimental devices necessary for its scientific activity, as well as the design, development and use of instruments.
IJCLAB bases its recruitment policy on the promotion of equality, diversity and inclusion. Essential values, they allow the professional development of agents, who are real actors in a collective success, but also the development of the laboratory itself.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.

Contraintes et risques

Regular trips to CERN (Switzerland) for data-taking, meetings and operational purposes will be possible.