CERN Beamline for Schools (BL4S)
Catalog organization: CERN, with DESY and the University of Bonn ELSA accelerator
Compiled by: ExtracurricularHub Editorial Team — editorial policy
Last updated
What Is CERN Beamline for Schools (BL4S)?
BL4S challenges worldwide high-school teams to design a feasible, creative experiment for a real particle-accelerator beamline. Students learn enough particle physics to write an English proposal of up to 1,000 words, guided by an adult coach and optional regional experts. An optional one-minute video and 200-word inclusive science-outreach plan compete for separate awards. Physicists and engineers judge the written experiment on feasibility, scientific method, motivation, and creativity.
Participation is free. For 2026, teams needed at least five students and a coach, and the formal terms described intended entrants as secondary students ages 16-19. CERN's FAQ separately explains how younger students may contribute anonymously or with parental data-processing consent, while all students traveling as winners must be at least 16 for accelerator safety.
CERN Beamline for Schools (BL4S) Key Facts: Cost, Deadline, and Eligibility
| Cost | Free |
|---|---|
| Format | Hybrid |
| Eligibility | Up to grade 12 |
| Application deadline | Dates not announced |
| Listing last updated | August 30, 2026 |
Program details shown here reflect the current catalog record.
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