Lead Applied Physicist

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a leading scientific research institution established to probe the fundamental structure of the universe. It employs physicists and engineers who utilize the world's largest and most complex scientific instruments to study the basic constituents of matter. CERN's mission is to advance knowledge and understanding of the universe through groundbreaking research and innovation. The organization has a diverse workforce and operates in multiple countries, fostering an environment of collaboration and inclusion.

Job Overview:
The position of Lead Applied Physicist within the Beam department at CERN involves overseeing the Linac3 ion source, which is crucial for the delivery of heavy ion beams. This role integrates various physics domains and requires expertise in beam dynamics, high voltages, high magnetic fields, and plasma heating. The successful candidate will be responsible for ensuring the high-performance delivery of particle beams, managing daily operations, and contributing to the long-term technical development of the system. The role also includes coordinating assembly and maintenance activities, optimizing performance, and mentoring a multidisciplinary team. The candidate will engage in advanced beam measurements and contribute to design studies for upgrades to the CERN ion injector complex, making this a pivotal role in the ongoing research and development at CERN.

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.
• Act as the expert in charge of commissioning and operating the ion source, tuning it for optimal performance and stability in compliance with beam quality specifications.
• Design and implement technical solutions to validate the production of various ion species for future physics programs.
• Be part of the machine expert team, contributing to broader beam operations and participating in the on-call service rotation for 24/7 reliable 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 (LEBT).
• Engage in beam dynamics design, simulations, and commissioning for present and future hadron linacs and sources under the section’s responsibility.

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 or similar scientific equipment, including high-voltage equipment and microwave generators, is essential. Familiarity with multi-particle simulation codes for sources and linacs is also required, with specific experience in codes such as IBSIMU, SIMION, TRAVEL, TRACEWIN, PARMTEQ, and RF-TRACK being advantageous. Additionally, candidates should have experience in experimental techniques and analysis of beam measurement data.

Educational Background:
A Master's degree or PhD in Applied Physics, Engineering, or a related field is required for this position. The educational background should include a strong foundation in physics principles, particularly those related to particle physics and accelerator technology.

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

Languages:
Fluency in spoken and written English is mandatory, with a commitment to learn French being a valuable asset for the position.

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 tenure. The working hours are 40 hours per week, and the job offers hybrid flexibility. The role involves working in radiation areas, interventions in underground installations, and exposure to lead and electromagnetic fields under certain conditions. A valid driving license is required, and the selected candidate must obtain medical clearance before a contract offer is confirmed. The job grade is 6-7, and the reference for this position is BE-ABP-HSL-2026-133-LD. The compensation includes a competitive salary, 30 days of paid leave per year, comprehensive health insurance, family allowances, and a relocation package depending on individual circumstances.