Missions

The research activity of the post-doctoral fellow consists of contributions to the international ePIC (electron Proton-Ion Collider experiment) collaboration associated with the construction of the future Electron-Ion Collider (EIC, Brookhaven National Laboratory -BNL, New York, USA). Within the framework of the EICROC project (development and characterization of a large size ASIC, 32x32 channels, dedicated to the readout of AC-LGAD sensors), the successful candidate will work within the “JLab-EIC” hadronic physics team of the “High Energy Physics” (PHE) pole of the Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab) under the supervision of Dominique Marchand, scientific coordinator of the EICROC project involving researchers (2), engineers (3) and technicians from IJCLab, OMEGA (Organization for Advanced General Micro-Electronics, 4 people), from the department of electronics, detectors and computing for physics (DEDIP, 1 person) of the CEA-Saclay/Irfu and BNL.
The work will consist in contributing to the development and the characterization of iterations of ASICs dedicated to the readout of AC-LGAD (Alternating Current coupled Low-Gain Avalanche Diode) sensors, capable of very good timing (~30 ps) and spatial (~20 um) resolutions, which will be exploited by several detectors in the ePIC experiment, notably the Romans Pots located in the Far-Forward region. The hired researcher will work within a collaborative environment and may be required to participate in the supervision of PhD or Master students.

Activités

The recruited person will exploit the existing test benches (Beta source and infrared laser) developed for the first EICROC protype (EICROC0, 4x4 channels) to characterize the electronic response of each channel, to evaluate the jitter, the crosstalk and to determine the charge sharing ratio of the system (EICROC0+AC -LGAD) and the achievable spatial resolution by using a Beta source and an infrared laser test bench. Script development in Python and C++ will be necessary to control ASIC parameters, to automate data collection and to record data for analysis (Python, ROOT). He/she will also take part to beam test campaigns (CERN, DESY, Mainz, FermiLab or BNL) and will be involved in simulation work (GEANT4) of exclusive processes, such as Deeply Virtual Compton Scattering (DVCS), taking into account realistic responses of the system EICROC+AC_LGAD. The results obtained will be the subject of progress reports (presentations, reports) intended for the EICROC international collaboration and dissemination of the results among the ePIC collaboration. These activities will also be presented in dedicated international workshops/conferences and, depending on the progress of the work, will result in publication(s).

Compétences

- PhD in experimental subatomic physics,
- Desired experience in scientific instrumentation / particle detection, ideally solid state detectors,
- Proven skills in data analysis and modeling (GEANT4),
- Assertive proficiency in Python, C++ (or C) programming languages, and in the ROOT software suite,
- Autonomy, organizational capacity and ability to report with pedagogy,
- Ability to work within a team,
- Fluency in English (oral and written) required,
- Proven ability to promote research: oral presentations and publications,
- Ability to work respecting rules and procedures,
- Ability to supervise students (Master interns, PhDs).

Contexte de travail

The Irène Joliot-Curie Physics Laboratory of 2 Infinities (IJCLab, https://www.ijclab.in2p3.fr/) is a UMR under the supervision of the CNRS (IN2P3), the University Paris-Saclay and the University of Paris-Cité. It is located on the campus of the University of Paris -Saclay, in Orsay. The laboratory is located on the campus of the Université Paris-Saclay in Orsay, 20 km South of Paris and easily accessible by RER trains, in about 35 minutes (from center of Paris).
The research themes of the laboratory are nuclear physics, high energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy, environment and health.
IJCLab has very significant technical capacities (~160 engineers and technicians) 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 (accelerators and detectors). Besides, the presence on-site of research infrastructures and technological platforms represents a major asset. In addition, about 90 engineers and technicians from administrative and support departments work in tight collaboration with scientific and technical staff.
The selected person will join the JLab-EIC team which includes around 12 persons (6 CNRS staff researchers, PhDs and post-doctoral fellows). The JLab-EIC team is part of the high energy physics (PHE) pole which accounts for about hundred members.
This position is located in a sector related to the protection of scientific and technical potential (PPST), and thus requires, in accordance with regulations, that your arrival is authorized by the competent authority of the Ministry of Higher Education and Research (MESR).

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

The retained candidate will be based primarily at IJCLab. As part of the international ePIC collaboration, travel abroad is to be expected, particularly to the USA, for work meetings, beam tests and workshops/conferences attendancies.
The recruited person will have to follow regulations (medical visits, trainings) regarding the risks associated with exposure to ionizing radiations and the use of a pulsed infrared laser.

Informations complémentaires

Submission of a cover letter and a CV without any break in date showing diplomas, titles and work (list of publications) and professional experience.
At least 2 letters of recommendation (among which one from the PhD advisor) are to be sent.
The CNRS aims for a balanced distribution between women and men in its staff. For this reason, qualified female candidates are encouraged to apply.
As the position is located in a ZRR (restricted regime zone), recruitment is conditional on obtaining a favorable opinion from the senior defense security official (HFSD). Consequently, the date of taking office, specified above, is specified for information purposes only and may be delayed.