Lead Applied Physicist

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a leading scientific research organization established to probe the fundamental structure of the universe. Founded in 1954, CERN employs thousands of scientists, engineers, and support staff from over 23 member states and operates in multiple countries. Its mission is to advance knowledge in the field of particle physics and to provide a unique environment for scientific collaboration and innovation. CERN is known for its large-scale scientific instruments and its contributions to the understanding of fundamental particles and forces.

Job Overview:
The Lead Applied Physicist position at CERN is a pivotal role within the Beam department, specifically in the Accelerator and Beam Physics group. The successful candidate will oversee the Linac3 ion source, integrating various physics domains with beam dynamics. This role requires a deep understanding of high voltages, magnetic fields, plasma heating, and vacuum systems. The physicist will ensure the high-performance delivery of heavy ion beams, which are crucial for the operation of CERN's unique accelerator complex. Responsibilities include coordinating assembly and maintenance activities, commissioning and operating the ion source, and designing technical solutions for future physics programs. The position also involves supervising a multidisciplinary team and conducting advanced beam measurements to optimize performance.

Duties and Responsibilities:

• Coordinate and participate in the assembly and maintenance of the Linac3 ion source during technical stops and shutdowns to ensure readiness for high-availability operation.
• Serve as the expert in charge, commissioning and operating the ion source, tuning it for optimal performance and stability.
• Design and implement technical solutions to validate the production of various ion species for future physics programs.
• Contribute to broader beam operations and participate in the on-call service rotation for reliable 24/7 injector operation.
• Supervise and mentor a multidisciplinary team of physicists, engineers, technicians, and students.
• Conduct advanced beam measurements and data analysis to characterize Linac3 performance and identify optimization areas.
• Contribute to design studies and execution of upgrades for the CERN ion injector complex, focusing on source technology and low energy beam transport.
• Engage in beam dynamics design, simulations, and commissioning for current and future hadron linacs and sources.

Required Qualifications:
Candidates must possess a Master's degree or PhD in Applied Physics, Engineering, or a related field. They should have demonstrated experience in the design and/or operation of particle sources for accelerators or in a related scientific field. Hands-on experience with particle sources, high-voltage equipment, and microwave generators is essential. Familiarity with multi-particle simulation codes such as iBSIM, SIMION, TRAVEL, TRACEWIN, PARMTEQ, RF-TRACK is advantageous. Experience in experimental techniques and analysis of beam measurement data is also required.

Educational Background:
A Master's degree or PhD in Applied Physics, Engineering, or a closely related field is required for this position. Equivalent relevant experience may also be considered.

Experience:
Candidates should have substantial experience in the design and operation of particle sources for accelerators or in related scientific fields. This includes hands-on experience with particle sources and scientific equipment, as well as familiarity with high-voltage equipment and microwave generators. Experience with multi-particle simulation codes and experimental techniques for beam measurement analysis is also necessary.

Languages:
Fluency in spoken and written English is mandatory, and candidates should demonstrate a commitment to learning French, which is considered beneficial for the role.

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. The role requires a 40-hour work week with hybrid job flexibility. Candidates must be prepared for work in radiation areas and underground installations, and must obtain medical clearance due to occupational health risks. The job grade is 6-7, and the reference for this position is BE-ABP-HSL-2026-133-LD. CERN offers a competitive salary, comprehensive health insurance, paid leave, and a relocation package depending on individual circumstances.