International competition for high school students from all around the world organised by CERN, the European Organization for Nuclear Research, in Geneva, Switzerland

The competition invites teams of high-school students to propose a scientific experiment that they want to perform at a particle accelerator. Because of the maintenance of CERN's accelerators since the end of 2018, the winning experiments in 2019 and 2020 ran at DESY in Hamburg, Germany. The first prize for the winning teams is a trip to a particle physics facility 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? Learn more about BL4S and how to apply and get inspired by our latest promotional video:


Take part in hands-on scientific experiments on-site at a particle accelerator! Through BL4S, CERN and DESY offer a great opportunity for students to learn, make new discoveries and apply their knowledge into new settings. Get inspired by our videos and previous winners, join our BL4S Facebook group and stay tuned for news! If you need more information, do not hesitate to get in touch with us at:

Edition 2020

Altogether 198 teams from 47 countries submitted a proposal.

This year the two winning teams have been invited again to DESY and CERN in autumn.

Past Editions

Would you like to see our previous editions? To discover  about the previous winners click  here.

In the picture above: Winner participants from the Beamline for schools competition in 2020 at CERN.


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In the picture above: Winner participants from the Beamline for schools competition in 2020 at DESY.


We are grateful to all our sponsors and supporters whose contributions help us make possible the Beamline for Schools Competition. 

To support the Beamline for Schools project, as well as other CERN projects that have an impact on society, donate through the CERN & Society website.