Applied physicist (Monte Carlo simulations and code developments)

Geneva, Switzerland
23 Nov 2022
23 Jan 2023

Company Description

At CERN, the European Organization 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. Find out more on

Diversity has been an integral part of CERN’s mission since its foundation and is an established value of the Organization.

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Job Description

Are you interested in radiation transport studies, code development and exciting new particle colliders? Then join the CERN FLUKA team ( and the International Muon Collider Collaboration (!

Monte Carlo particle transport calculations are essential for quantifying the radiation damage, beam-induced background and shower-induced heat load in new high-energy colliders.

This position offers a twofold activity, combining radiation transport simulations for an energy-frontier muon collider with related code developments for the FLUKA package.

You will:

  • Perform FLUKA radiation transport calculations for a muon collider ring;
  • Contribute to the absorber design for detectors and magnets by simulating the propagation of secondary showers in the machine. The muon collider-related work of this position will be carried out in the scope the EU co-financed MuColl study;
  • Be directly involved in the development of the FLUKA code, in particular for the aspects relevant to the aforementioned studies. Among them, you will contribute to the improvement of the new synchrotron radiation emission module as well as of the evaporation module, in order to obtain a more accurate prediction of the isomer production, of importance for radiation protection assessments.


Eligibility criteria:

  • You are a national of a CERN Member or Associate Member State;
  • You have a Master’s degree and between 2 and 6 years’ experience or PhD with up to 3 years of relevant experience in physics or other related field;
  • You should have a working knowledge of English or French.

Skills and/or knowledge:

  • Simulation of radiation environments;
  • Knowledge of particle-matter interactions;
  • Knowledge of programming techniques and languages;
  • Knowledge of at least one Monte Carlo code (FLUKA, Geant4, etc.) is an asset.

Additional Information

What we offer:

  • An employment contract of in principle 24 months, with a possible extension up to 36 months;
  • On-the-job and formal training at CERN as well as in-house language courses for English and/or French;
  • A monthly stipend ranging between 6050 and 6650 Swiss Francs per month (net of tax);
  • Coverage by CERN’s comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund;
  • Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract;
  • 30 days of paid leave per year.

How to Apply:

You will need the following documents to complete your application:

  • A CV;
  • A scanned PDF of your most recent relevant qualification;
  • We recommend to add two recent letters of recommendation, giving an overview of your academic and/or professional achievements. You can upload these letters at the time of application if you have them to hand. You will also be provided with a link as soon as you have submitted your application to forward to your referees to upload their letters confidentially.

The earliest expected start date for selected candidates is May 2023.

Ready to take part? Then please submit your application by 23 January 2023 at  midnight (12.00 AM CEST).

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