Beamline for schools

BEAMLINE FOR SCHOOLS (BL4S) is an official competition powered by CERN, the European Organization for Nuclear Research, in Geneva, Switzerland. It is open for all high-school students around the world. The competition invites teams of high-school students to propose a scientific experiment that they want to perform.
Because of the maintenance of CERN's accelerators starting at the end of 2018, the winning experiments in 2019 will be run at DESY in Hamburg, Germany, a world-leading accelerator centre. The first prize for two winning teams is a trip to DESY to carry out their proposed experiments at a fully-equipped accelerator beamline. There are additional prizes for shortlisted teams and certificates for all participants.

How to take part? Register now:

Prizes: All participants receive a certificate. Short-listed teams win a BL4S T-shirt for each team member, a cosmic-ray detector (CosmicPi) for the school, and – for some – the chance to visit a nearby physics laboratory. For the winning teams, nine members and up to two adult coaches per team will be invited, all expenses paid, to DESY for 10-12 days to carry out the experiments.

Want to know more? For many countries, experienced scientists have offered to help the teams in their native language:


2019 - Submission deadline over


10 days

Minimum age


Maximum Age



English, French


DESY, Hamburg, Germany

How to sign up

Register before 31 March 2019 on

Key dates:

  • July 2018 – Registration Opening Register your team name, country, and coach’s contact details to start receiving email updates.
  • 31 March 2019 – Submission Deadline Submit your 1000-word proposal and 1-minute video (both in English only) by midnight CET.
  • June 2019 – Winners Announcement CERN and DESY announce the winners, who will be invited to DESY, as well as 20 to 30 short-listed teams.
  • September/October 2019 – Winners conduct their experiment at DESY Exact dates will be defined by DESY's accelerator schedule.



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