Accelerator Physicist

03 Mar 2017
End of advertisement period
09 Apr 2017
Contract Type
Fixed Term
Full Time


Accelerator Physicist in the Beams (BE) Department, Operations (OP) Group, Proton Synchrotron Booster (PSB) section.

The Operations group is responsible for the operation of the entire CERN accelerator complex, which currently consists of four linear accelerators (Linacs), six synchrotrons and seven experimental areas, as well as for the operation of CERN's technical infrastructure. In addition to the varied proton, antiproton and heavy ion experimental programs, the complex also supplies protons and heavy ions to the Large Hadron Collider (LHC). In the Proton Synchrotron Booster section you will be at the heart of the preparation of proton beams for the varied physics programs at CERN.

You will join:

  • The Beams Department (BE), responsible for the beam production, beam and accelerator physics, beam diagnostics, radiofrequency, controls and performance optimization for the entire CERN accelerator complex including the LHC.
  • The Operations Group (OP), responsible for the operation of all CERN's present and future accelerators, their associated Experimental Areas and for monitoring the overall technical infrastructure at CERN. Further details on the operations group can be found at:
  • The Proton Synchrotron Booster (PSB) section, comprising a dynamic team of 8 staff.


As Accelerator Physicist in the Proton Synchrotron Section, you will:

  • Ensure the optimization of the PSB performance, its injector and the transfer lines.
  • Act as PSB machine supervisor and participate as such in the on-call rota on a weekly basis.
  • Act as contact person for the various equipment groups to provide operation- and beam optics-related information.
  • Prepare equipment specifications from the operations point of view.
  • Take a leading role in the beam re-commissioning phases of the PSB after technical stops.
  • Participate in the LHC injector upgrade (LIU) project for the PS Booster and its commissioning:
    • Take responsibilities for the LINAC4 reliability run, its connection to the PSB and the PSB energy upgrade;
    • Take a leading role in the commissioning of the hardware and the commissioning of the whole machine with beam after Long Shutdown 2 (LS2);
    • Lead the effort to increase the PSB beam performance to match the LIU design parameters after LS2.


Master's degree in the field of Physics, or equivalent.

Experience and competencies

The experience required for this post is:

  • Demonstrated experience in accelerator operation;
  • Demonstrated experience in the application of accelerator physics for accelerator performance optimization;
  • Extensive experience in the use of data analysis techniques;
  • Experience with accelerator physics simulations would be an advantage;
  • Experience with project management and related tools would be an advantage.

The technical competencies required for this post are:

  • Accelerator operation.
  • Accelerator performance analysis & optimization.
  • Knowledge of beam optics (rings and transfer lines).

The behavioural competencies required for this post are:

  • Demonstrating flexibility: adapting quickly and resourcefully to shifting priorities and requirements.
  • Communicating effectively: listening actively to others and letting others speak; utilising effective negotiation techniques to achieve long-term results acceptable to all parties involved.
  • Working in teams: contributing to promoting a positive atmosphere in the team through an optimistic and constructive attitude; addressing issues.
  • Achieving results: having a structured and organised approach towards work; being able to set priorities and plan tasks with results in mind.
  • Managing self: taking initiative beyond regular tasks and making things happen; working well autonomously; taking on activities and tasks without prompting.

The language competencies required are:

  • Spoken and written English or French: ability to understand and speak the other language in professional contexts. Ability to draw-up technical specifications and scientific reports and to make oral presentations in at least one of the two languages.

Eligibility and closing date

Employing a diverse and international workforce is a CERN core value and central to our success. We welcome applications from all Member States irrespective of gender, age, disability, sexual orientation, race, religion or personal situation.

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 09.04.2017.

By applying here, you allow CERN to consider your application for any position it considers relevant with respect to your profile. Please ensure you update your profile regularly with any relevant information and that you inform the recruitment service if you wish your file to be removed from the database.

Note on Employment Conditions

We offer a limited-duration contract for a period of 5 years. Limited-duration contracts shall terminate by default on their date of expiry.
Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

These functions require:

  • Participation in a regular stand-by duty, including nights, Sundays and public holidays.
  • Work in radiation areas.
  • Interventions in underground installations.
  • A valid driving licence.