Post-doctoral researcher in Microelectronics and Instrumentation for Dark Matter Detection (M/F)

Job Description

Missions

The postdoctoral researcher will join the Direct Dark Matter (DDM) research group within the Astroparticles, Astrophysics & Cosmology (A2C) division, which is involved in the DAMIC-M experiment (Dark Matter in CCDs at Modane) at IJCLab. Under the supervision of the project leader, they will be responsible for the development and characterization of a new Skipper CMOS detector.
This work is part of a collaboration with C4Pi (Centre de Compétences de Capteurs CMOS à Pixels Intégrés, IPHC, Strasbourg) and the ARCADIA CMOS platform (INFN, Italy), aimed at adapting Skipper technology (non-destructive multiple readout) from CCDs to standard CMOS processes, in order to reach single-electron detection thresholds with low dark current and short readout times. These detectors will be operated at IJCLab within the PARIS-CMOS platform (Plateforme Avancée de Réception d'Images Skipper CMOS).

Activity

The candidate will be involved across the full development chain, from initial design through to experimental validation. Their main activities will include studying and simulating CMOS pixel architectures optimized for Skipper readout, and adapting designs to the specific constraints of the ARCADIA platform. They will also be responsible for setting up test benches to characterize readout noise, dark current, and charge transfer efficiency. Finally, the role involves processing signals from prototypes to validate performance requirements for DAMIC-M or other applications, coordinating technically with INFN international partners, and disseminating results through publications and conference presentations.

Your Profil

Skills

The position is open to candidates holding a recent PhD (within the last 3 years) in microelectronics, particle physics, or instrumentation. A solid background in CMOS fabrication processes and semiconductor physics is required, together with hands-on experience in integrated circuit design and simulation. Expertise in very low-amplitude signal measurement techniques (sub-electron noise) is strongly desirable. The project requires proficiency in scientific English and the ability to work effectively in a team on complex projects. The researcher must demonstrate autonomy and rigor, while maintaining close collaboration between technical services and local and international research teams.

Your Work Environment

IJCLab (Laboratoire de Physique des 2 Infinis Irène Joliot-Curie) is a joint research unit under the supervision of CNRS, Université Paris-Saclay, and Université de Paris. Founded in 2020 from the merger of five historical laboratories on the Orsay campus, it brings together nearly 700 people working on topics ranging from nuclear physics to cosmology. The laboratory has exceptional technical capabilities, with around 280 engineers and technicians specializing in mechanics, electronics, and instrumentation, making it a first-rate environment for the development of innovative detectors.
Within the A2C division, the candidate will work in a stimulating scientific environment, with access to the resources of the PARIS-CMOS platform and regular interactions with the DAMIC-M collaboration. They will benefit from a unique ecosystem combining high-level expertise, from theoretical physicists to experimentalists. The project will rely on close collaboration with the laboratory's technical services (electronics, mechanics, workshops), providing a comprehensive working framework spanning from fundamental design to experimental realization.
IJCLab bases its recruitment policy on the promotion of equality, diversity, and inclusion. These core values support the professional development of all staff, who are active contributors to collective success, as well as the growth of the laboratory itself.

Constraints and risks

Short-duration travel within Europe is expected, particularly to Italy in the context of the ARCADIA/INFN collaboration (potentially up to several months in total). The position will involve work in a cleanroom and potentially at the Modane Underground Laboratory (LSM).

Applicants must submit a complete application file including a cover letter and a detailed CV with no gaps in dates. A letter of recommendation and the contact details of two scientific references (thesis supervisor or previous supervisor) are strongly encouraged.

Compensation and benefits

Compensation

Based on experience, starting from €3131,32 gross per month

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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