Applied Physicist

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a leading scientific research institution established in 195

• It is headquartered in Geneva, Switzerland, and employs over 2,500 staff members, along with thousands of scientists and engineers from around the world. CERN operates in multiple countries, collaborating with numerous international institutions to advance the field of particle physics. The organization is renowned for its groundbreaking research and the development of the Large Hadron Collider (LHC), the world's largest and most powerful particle accelerator, which has significantly contributed to our understanding of the fundamental structure of matter and the universe.

Job Overview:
The position of Applied Physicist at CERN focuses on the development and research of particle detectors, specifically for the ALICE experiment, which studies strongly interacting matter. The successful candidate will engage in the design and construction of the next-generation silicon vertex detector, known as ITS3, which will be crucial for future experiments. This role requires a multidisciplinary approach, combining physics modeling with engineering challenges to innovate and enhance detector technologies. The Applied Physicist will be involved in various stages of the detector's lifecycle, from prototype characterization to commissioning and operation, ensuring that the detector meets the high standards required for cutting-edge research in particle physics.

Duties and Responsibilities:
The Applied Physicist will have a comprehensive set of responsibilities, including:

• Prototype Characterization: Planning and executing laboratory and beam-test campaigns, developing and operating test benches and data acquisition systems, and performing calibration and data analysis to assess noise, charge collection, efficiency, and radiation tolerance.
• Sensor and Test-System Development: Contributing to the design, prototyping, and qualification of new sensor components and test systems, including front-end/readout systems, interconnects, and cooling mechanisms.
• System Integration and Installation: Preparing integration procedures, coordinating installation with ALICE subsystems, and ensuring all interfaces are properly managed.
• Commissioning and Operation: Defining commissioning strategies, ensuring subsystems are ready for operation, and developing monitoring systems for performance follow-up during data collection.
• R&D for Future Upgrades: Specifying requirements for future upgrades, evaluating new concepts, and prototyping novel solutions.
• Project Coordination and Reporting: Leading technical meetings, planning schedules, tracking risks, and reporting progress to management.
• Supervision and Knowledge Transfer: Mentoring students and post-docs, providing technical coaching, and producing high-quality documentation to facilitate knowledge sharing within the team.

Required Qualifications:
Candidates must possess a PhD or equivalent relevant experience in detector systems for particle physics or a closely related field. They should have postdoctoral experience in the development and construction of particle physics detectors, with hands-on expertise in assembly, integration, and testing of such systems. Familiarity with detector hardware and software, including Detector Control Systems (DCS) and Data Acquisition (DAQ), is essential. Experience with silicon pixel detector technologies, particularly MAPS, is advantageous. Technical competencies should include simulation, design, and development of particle accelerators, as well as analysis and optimization of detector performance through calibration and data analysis using programming languages such as C++ and Python.

Educational Background:
A doctoral degree (PhD) in physics, engineering, or a related field is required for this position. The educational background should encompass a strong foundation in particle physics, detector technologies, and relevant engineering principles. Candidates should have a comprehensive understanding of the theoretical and practical aspects of particle detection and the ability to apply this knowledge in a research environment.

Experience:
The ideal candidate should have substantial postdoctoral experience, ideally in the field of particle physics detectors. This includes practical experience in the assembly, integration, and testing of detector systems, as well as familiarity with the operational aspects of experiments. Candidates should demonstrate a proven track record of successful project involvement and the ability to work collaboratively in a multidisciplinary team setting.

Languages:
Fluency in spoken and written English is mandatory for this position, as it is the primary language of communication at CERN. Additionally, candidates should be committed to learning French, which is beneficial for integration into the local community and workplace.

Additional Notes:
This position is a limited duration contract for 5 years, with the possibility of extension up to 8 years and eligibility for an indefinite contract thereafter. The job requires a commitment of 40 hours per week and may involve work in radiation areas, interventions in underground installations, and occasional work during nights, Sundays, and official holidays as required by organizational needs. The job grade is classified as 6-7, and the reference for this position is EP-AID-DT-2025-181-LD. CERN offers a competitive, tax-free salary that increases with relevant experience, along with 30 days of paid leave per year, comprehensive health insurance, and a relocation package depending on individual circumstances.