Hadron Sources and LINACs Physicist; BE-ABP-HSL--GRAP

Employment Type:

Full-time

You will join a team working on sources and LINACs beam dynamics simulations. In this position, you will take charge of Linac4 source extraction studies, design and measurements. This includes the implementation of existing models in Xsuite and benchmark with Trace Win and Travel codes.

• Get familiar with linac beam dynamics codes and the existing machine models under HSL section responsibility.
• Study the Linac4 source extraction. Propose and implement new designs aiming at reducing the transverse beam emittance and increasing the beam current into the RFQ acceptance. Qualify those at the source test stand with beam measurements.
• Implement the existing Linac4 models (Travel, Trace Win, Toutatis) in Xsuite. Proceed to a detailed code benchmark.

• Experience in electromagnetic or accelerator simulations.
• Proven ability to work on both simulations and hands‑on experiments.
• Demonstrated experience of work in the design and/or operation of particle sources for accelerators or a similar scientific field.
• Experience with one of the following codes would be an asset (Travel, Trace Win, Toutatis, IBSIMU, Xsuite).

• Knowledge of beam dynamics simulation.
• Knowledge of electromagnetic simulation tools (Opera, CST, Superfish, etc...).
• Basic programming skills (Python, C++).
• Problem‑solving mindset and ability to learn new tools.
• Spoken and written English, with a commitment to learn French.

• You are a national of a CERN Member or Associate Member State.
• You have a professional background in Applied Physics, Engineering (or a related field) and have either:
  • a Master's degree with 2 to 6 years of post‑graduation professional experience;
  • or a PhD with no more than 3 years of post‑graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Job closing date:
11.03.2026 at 23:59 CET.
Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours:

40 hours per week

Job flexibility:
Hybrid

Target start date: 01-May-2026

This position involves:

• Work in Radiation Areas.
• Stand‑by duty, when required by the needs of the Organisation.
• Exposure to electromagnetic fields under certain exposure conditions.

Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Job reference: BE-ABP-HSL-2026-27-GRAP

Field of work:
Applied Physics

Benchmark job: 200140 - Applied Physicist

• A monthly stipend between  Swiss Francs per month (tax free) depending on your degree.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant and travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 36 months.
• On‑the‑job and formal training including language classes.

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting‑edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe!
TAKE PART!
More information about us, here: careers.cern