To Submit your proposal for BL4S 2021:
Click here

General information about the proposal submission

Students must work together to create a proposal in two parts:

  • Proposal
    • A written proposal of up to 1000 words
      that may be supported by diagrams or pictures
      (acknowledgements, references, formulas etc. and a
      reasonable amount of words in figures are
      not counted). It should contain:
      • Why you want to
        come to DESY
      • Your experimental idea and how you
        would like to use the particle
        beamline for your experiment
      • What you hope to
        take away from
        the experience
    • A one-minute video that summarizes
      your written proposal in a creative,
      entertaining way and that
      introduces the members of the team.

In 2021, the one-minute video is not mandatory for taking part in the competition, but the best video will receive a special prize. The winners will be selected according to the written proposal only.

The evaluation will take into account the following criteria:

  1. Feasibility of the experiment
  2. Ability to follow the scientific method
  3. Motivation of the experiment and to come to a particle accelerator
  4. Creativity of the experiment

Note that all of the above points are important for the judgment. We are not expecting a fully developed experimental proposal with a detailed setup and hypothesis. An idea of what you and your team want to find out, or how you want to use the beamline communicated in a creative way is enough to take part. Do not worry if the technical details of the beamline facilities look a little daunting at first. We have provided several example experiments and people to contact for help.

Adults are encouraged to help students understand what the particle beam is capable of, but the students must create the proposal themselves. The winning teams will have the opportunity to work with DESY and CERN scientists to refine their ideas before they come to facility.

Please note that the CERN and DESY logos are legally protected and any use by third parties is forbidden. However, the BL4S logo can be used if desired.


Details of the CERN Privacy Notice governing the processing of personal data by CERN in the context of the Beamline for Schools Competition submission of proposals is available at: