Applied Physicist (Radiation Environment)

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


Applied Physicist (Radiation Environment) in the Experimental Physics (EP) Department, LHCb Coordinators Office (LBO) Group, Detectors Operation (DO) Section.

You will join:

  • The Experimental Physics (EP) Department that carries out basic research in the field of experimental particle physics. It aims at providing a stimulating scientific atmosphere and is an important reference centre for the particle and nuclear physics community at large. It contributes to the education and training of young scientists.

  • The LHCb experiment, one of the four large experiments at the LHC at CERN. The experiment is specialised in investigating the tiny difference between matter and anti-matter and searching for hints of new physics. The LHCb experiment has been taking data for several years and a major upgrade of its detector is being prepared which will be installed in 2019/2020.

  • The LHCb Detectors Operation section in the Coordinators Office Group (LBO-DO) that is responsible for the support of the detectors' design, installation and operation as well as decommissioning. The group also liaises with other groups in EP and other departments at CERN to provide general infrastructures and services to the experiment and ensure its safe operation and maintenance in accordance to CERN safety rules and regulations.


As an Applied Physicist with expertise in Radiation Environment in the LBO-DO Section, you will provide the assessment of the radiation environment of the LHCb experiment both in its current running conditions and for future upgrades.  The knowledge of this aspect of the experiment is essential for the technology choices to be carried out for several sub-systems as well as the planning of installation, maintenance and decommissioning of the experiment with strong implications on the reliability of the detector and safety of personnel.

You will ensure necessary studies and measurements will be carried out and work closely with the project leaders so that such information is properly taken into account in the construction and operation of the LHCb experiment over the next years.

You will:

  • Carry out simulation of both prompt and residual radiation levels for the upgrades of the LHCb experiment.

  • Monitor prompt radiation levels in the LHCb cavern during operation and determine the evolution of the existing system for the LHCb upgrade.

  • Ensure that coherent up-to-date information on radiation levels is provided to all LHCb sub-systems.

  • Contribute to the determination of the amount of radioactive material to be handled in the next Long Shutdown as well as the radiological environment and the amount of radioactive material expected from operation of the LHCb upgrade.

  • Fulfil the role of Radiation Protection Expert assuming responsibility for the organization of low-risk regular activities in the experiment in collaboration with the relevant CERN safety groups.

  • Support the Technical Coordination team, taking an active role in safety activity, in particular working closely with the LHCb Radiation Safety Officer to address in the safety procedures for the LHCb Upgrade the radiological risk according to the ALARA principle.


PHD/Doctorate in the field of physics, or equivalent.

Experience and competencies

The experience required for this post is:

  • Extensive experience in the simulation of the radiation environments of a Particle Physics Experiment.

  • Good understanding of the operation of a Particle Physics Experiment and its detector.

  • Proven experience in the use, measurement and evaluation of ionizing radiation devices.

  • Some experience in carrying out operational radiation protection activities.

  • An initial experience in organizing activities of small groups of people will be appreciated.

The technical competencies required for this post are:

  • Simulation of radiation environments: good knowledge of the FLUKA software.
  • Detector performance simulation and analysis: in particular of devices used for radiation measurements.
  • Knowledge of nuclear structure: including radioactive decays and spectroscopy.
  • Knowledge of measurement techniques for ionising radiation.
  • Detector design, construction, testing and operation: some knowledge will be beneficial.

The behavioural competencies required for this post are:

  • Demonstrating accountability: working conscientiously and reliably; delivering on promises.
  • Managing self: working well autonomously; taking on activities and tasks without prompting; remaining objective, focussed and productive in a stressful environment; focusing on solutions rather than problems.
  • Communicating effectively: delivering presentations in a structured and clear way; adjusting style and content to the audience; responding calmly and confidently to questions; leveraging support networks across the Organization.
  • Demonstrating flexibility: adapting quickly and resourcefully to shifting priorities and requirements; being able to demonstrate flexibility whilst abiding by all applicable rules.

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/or 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 31.03.2017.

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:

  • Work during nights, Sundays and public holidays.
  • Work in radiation areas.
  • Interventions in underground installations.
  • A valid driving licence.
  • Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Grade 6 or 7