Accelerator Physicist

**Company Description**

At CERN, the European Organisation for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature.

**Introduction**

You will engage in the design and specification of beam transfer systems across CERN’s accelerator complex, following the systems from initial concept to beam commissioning and operational deployment. An intrinsic part of your work will be to carry out the R&D needed to understand the performance of existing beam transfer systems and to propose improvements or upgrades needed to meet the future needs of CERN’s ambitious research programme.

**Functions**

- Design and specify beam transfer systems (injection, extraction, primary beamlines/transfer lines) in collaboration with internal and external partners, including drafting technical and functional requirements.
- Develop and perform beam dynamics simulations including advanced ML/AI-based models to analyse, predict, and optimise system behaviour and performance.
- Conduct R&D to improve system performance and reliability, including planning and coordinating machine development studies to validate new concepts.
- Commission beam transfer systems with particle beams, diagnose operational issues, and propose solutions to maintain or enhance performance.
- Communicate results through peer-reviewed publications, conference contributions, and clear presentations tailored to both technical and non-technical audiences.
- Supervise students and coordinate postdoctoral research contributions to beam transfer studies and R&D activities.

**Qualifications**

Master's degree or PhD or equivalent relevant experience in the field of Physics, Applied Physics or a related field.

**Experience**:

- Experience in accelerator physics, including beam dynamics and modelling with simulation tools.
- Practical experience at accelerator facilities with machine development studies, beam commissioning and operational support.
- Ability to analyse complex technical problems, evaluate system performance, and develop data-driven solutions.

**Technical competencies**:

- Simulation, design and development of primary and secondary beam lines;
- Knowledge of/ identification and selection of relevant emerging accelerator technologies.

**Behavioural competencies**:

- Demonstrating Accountability: taking responsibility for own actions and decisions.
- Managing Self: remaining objective, focused and productive in a stressful environment; focusing on solutions rather than problems.
- Demonstrating Flexibility: being willing to work on different projects simultaneously.
- Learning and Sharing Knowledge: sharing knowledge and expertise freely and willingly with others; coaching others to ensure knowledge transfer.
- Communicating Effectively: delivering presentations in a structured and clear way; adjusting style and content to the audience; responding calmly and confidently to questions.

**Language skills**:
Spoken and written English, with a commitment to learn French.
**Additional Information**
**Eligibility and closing date**:
**Employment Conditions**

Working Hours: 40 hours per week

Job Flexibility: Fully Onsite

This position involves:

- A valid driving licence.
- Work during nights, Sundays and official holidays, when required by the needs of the Organisation.
- Exposure to electromagnetic fields under certain exposure conditions.

Job grade: 6-7

Job reference: SY-ABT-BTP-2025-262-LD

Field of work: Applied Physics

Benchmark Job Title: Applied Physicist

**Global Benefits**

- A competitive salary (tax free), increasing in line with your years of relevant experience.
- 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, removal, travel expenses) depending on your individual circumstances.
- Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

**Overview of CERN - Discover a world where the impossible is made possible**

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 cutti