An International physics competition for high school students organised by CERN, the European Organization for Nuclear Research, in Geneva, Switzerland and DESY, Hamburg, Germany

Beamline for Schools (BL4S) invites teams of high-school students from all around the world to propose a scientific experiment that they want to perform at a particle accelerator. The three 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 2023 the experiments will be performed at one of the beamlines of the CERN Proton Synchrotron accelerator as well as at a beamline of the DESY-II synchrotron. 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! 

You won't be alone during the preparation of the competition, a new version of the technical documentation will be released soon and you will have the opportunity to get in touch with scientists from all around the world willing to help you. 

Pre-Register Now to BL4S 2023


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.