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

Beamline for Schools invites teams of high-school students to propose a scientific experiment that they want to perform at a particle accelerator. The two teams that prepare the best proposals will win a trip to a particle accelerator facility to perform their experiments at a fully-equipped beamline. In 2022 the experiments will be performed at one of the beamlines of the CERN Proton Synchrotron accelerator. There are additional prizes for a shortlist of teams and certificates for all participants. Learn more about BL4S and how to apply and get inspired by our promotional video:


Through BL4S, CERN offers 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!

How to take part?

Form a team and think about an experiment that can be performed at a test beam facility.

Read carefully the invitation to the competition.

Technical information

Start learning about the properties of the beam and the detectors available for BL4S.

Download our technical document!


The proposals submission for BL4S 2022 is over.

The evaluation is on going and the results will be announced in June.




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.