Applied Physicist for the Muon Cooling Complex of the Muon Collider and muon cooling test facility

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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

The International Muon Collider Collaboration hosted by CERN investigates the feasibility of a muon collider as a most promising sustainable path towards very high collision energies.

This present position is part of a Design Study co-financed by the European Commission. It is focused on the baseline concept of the RF systems for the novel Muon Cooling Complex (MCC) of the high energy muon collider study as well as on the conceptual design of the RF system for the Muon Cooling Test Facility (MCTF) as the next step towards muon collider. Based on the input from the beam dynamics a consistent set of parameters for all RF cavities and associated RF systems will be elaborated creating backbone of the conceptual design of the RF system for the MCC. For certain specific examples of such a cavity which will be used  for the MCTF, more advanced engineering design will be performed including 3D RF design and thermo-mechanical simulations, as well as consideration of integration into the cooling cells for operation at gradients up to 30 MV/m in RF cavities that will be placed in magnetic fields of up to 13 T. The impact of the beam loading on the muon energy spread will have to be investigated and appropriate mitigating measures proposed.


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 applied physics or other related field;
  • You should have a working knowledge of English or French.

Skills and/or knowledge:

  • Electromagnetic theory and Accelerator physics;
  • 3D numerical simulations of electromagnet fields using 3D codes like Ansys EM, CST, COMSOL, or others.

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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Geneva, GE, CH

Genève , Switzerland