Radiation Physicist FCC-ee; SY-STI-BMI--GRAP

What you'll do

In this role, you will perform Monte Carlo radiation transport studies for the FCC-ee technical insertions, quantifying the radiation exposure of equipment installed in the FCC-ee tunnel. In addition, you will perform energy deposition studies for the design of different FCC-ee accelerator systems, in particular the collider and booster dump systems and protection devices.

• Carry out particle-matter interaction studies with the FLUKA Monte Carlo code and implement geometry models for FCC-ee machine studies.
• Assess the expected radiation levels due to regular beam losses and synchrotron radiation emission in the FCC-ee technical insertions.
• Perform energy deposition studies for accidental beam losses in FCC-ee and actively participate in the conceptual design of FCC-ee protection devices (absorbers, collimators) and dumps.
• Closely collaborate with beam physicists and mechanical engineers, in order to translate absorber and dump concepts into technical specifications

• Knowledge of particle-matter interactions;
• Experience with Monte Carlo radiation transport simulations and transport codes (FLUKA, Geant4, etc.);
• Proficiency in scientific computing;
• Knowledge of accelerator physics is an advantage

• Basic programming skills (e.g. Python, C++) for data analysis and code development;
• Familiarity with numerical methods and scientific computing;
• Problem-solving mindset and ability to learn new tools quickly (e.g. auxiliary tools for particle transport simulations);
• Excellent team-working attitude, with colleagues from different fields of applied physics and engineering (multidisciplinary and international environment)

Ideal start date: 01/03/2026
Contract duration: 24 month contract
Job flexibility: Fully Onsite

• You are a national of a CERN Member State or Associate Member State.
• By the Final date to receive applications, you have a master’s degree with 2 to 6 years of professional experience since graduation or a PhD with a maximum of 3 years of professional experience since graduation. You are not eligible with only a bachelor’s degree.
• You have never had a CERN fellow or graduate contract before.
• Please pay attention to the additional criteria and requirements for this specific position and mentioned above.

• Your CV (English or French)
• Any document you consider relevant to your application
• A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)