Job Descriptionbr/br/pThe a n_TOF facility /a at CERN provides high-intensity, wide-energy neutron beams for high-precision studies in nuclear astrophysics and medical applications. /ppThis position will focus on simulation studies with the aim of optimising the facilities performance. You will contribute to neutronics validation and benchmarking of the latest neutron data libraries. The work will include the redesign of a collimation system as well as the design of a dedicated neutron transmission measurement station. /ppYou will also have the opportunity to gain experience in the operations experimental facilities as part of the local support team for n_TOF. /ppstrongYour responsibilities /strong /pulliSimulation studies for n_TOF facility physics performance optimisation and future program. /liliRedesign of a collimation system as well as the design of a dedicated neutron transmission measurement station. /liliQuantifying and mitigating secondary radiation through optimised shielding configurations and design modifications. /liliUse of FLUKA for advanced Monte Carlo modelling, including refinement of low-energy neutron transport, such as self-shielding effects in the unresolved resonance region and Doppler broadening corrections. /liliNeutronics validation and benchmarking of the latest neutron data libraries. /li /ulpstrongYour profile /strong /pulliExperience in using Monte Carlo transport codes for physics experiments. /liliExperience performing studies in the field of neutron physics / neutronics. /li /ulpuSkills /u /pulliNeutron physics knowledge. /liliMonte Carlo simulation. /liliFluka knowledge would be an advantage. /liliSpoken and written English, with a commitment to learn French. /li /ulpuEligibility criteria: /u /pulliYou are a national of a a CERN Member or Associate Member State /a. /liliYou have a professional background in Physics (or a related field) and have either:ullia strongMaster's degree with 2 to 6 years /strong of post-graduation professional experience; /lilior a strongPhD with no more than 3 years /strong of post-graduation professional experience. /li /ul /liliYou have never had a CERN fellow or graduate contract before. /li /ulbrAdditional Informationbr/br/pJob closing date: strong at 23:59 CEST. /strong /ppContract duration: 24 months, with a possible extension up to 36 months maximum. /ppWorking hours: 40 hours per week /ppJob flexibility: Hybrid /ppTarget start date: 01-September-2026 /ppThis position involves: /pulliWork in Radiation Areas. /liliInterventions in underground installations. /liliStand-by duty, when required by the needs of the Organization. /liliWork during nights, Sundays and official holidays, when required by the needs of the Organization. /li /ulpJob reference: SY-STI-BMP- -GRAP /ppField of work: Applied Physics /ppBenchmark job: - Applied Physicist /p pstrongGlobal Benefits /strong /pulliA monthly stipend between Swiss Francs per month (tax free) depending on your degree. /lili30 days of paid leave per year plus 2 weeks annual closure. /liliCoverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund. /liliFamily, child and infant monthly allowances depending on your individual circumstances. /liliA relocation package (installation grant and travel expenses) depending on your individual circumstances. /liliPossibility to extend your contract up to 36 months. /liliOn-the-job and formal training including language classes. /li /ulpstrongOverview of CERN - Discover a world where the impossible is made possible! /strong /ppAt 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. /ppEvery 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. /ppIf 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! strongTAKE PART! /strong /ppstrongMore information about us, here: /stronga strongcareers.cern /strong /a /p