Accelerator Physicist (BE-ABP-LNO-2026-138-GRAP)

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An Accelerator Physicist role at CERN focuses on the layout and optics design of the Linear Collider Facility at 380 GeV, contributing to a future collider. You will perform beam dynamics simulations, study interaction regions and damping rings for a possible dual beam delivery system, and help write the summary design report. Strong candidates combine lepton beam dynamics and optics knowledge, synchrotron radiation, tracking, and experience with MAD, Xsuite, ELEGANT, pyAT and GuineaPig plus HPC. In your application highlight relevant projects and quantified simulation gains, demonstrate clear writing and presentation skills, confirm eligibility as a CERN member or associate member state, and indicate willingness to learn French and work in a hybrid setup.

Job Description

You will contribute to a proposal covering the layout, optics design, performance optimisation and evaluation of a potential future collider at CERN, the Linear Collider Facility @ 380 GeV (LCF380).

Your responsibilities

• Work on various design aspects of LCF380.
• Perform beam dynamics simulations to demonstrate its performance.
• Investigate the interaction regions (optics design, layout, for a possible dual beam delivery system) and the damping rings to optimise performance.
• Contribute to writing the summary design report.

Your profile

• Knowledge and understanding of lepton beam dynamics and optics design, including synchrotron radiation.
• Knowledge and experience in the setup, analysis and interpretation of particle tracking studies.
• Analysis of experimental data.

Skills

• Accelerator physics codes like MAD, Xsuite, ELEGANT, pyAT, GuineaPig, etc.
• Running simulations on an HPC.
• Good presentation skills.
• Spoken and written English, with a commitment to learn French.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• You have a professional background in Physics (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.

Additional Information

Job closing date: 09.09.2026 at 23:59 CEST.

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-November-2026

Job reference: BE-ABP-LNO-2026-138-GRAP

Field of work: Applied Physics

Benchmark job: 200140 - Applied Physicist

Global Benefits

• A monthly net stipend of either 6372 or 7004 Swiss Francs per month 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.

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