CERN Beamline for Schools 2022

7 december 2021

Great things can happen when high school students get involved with innovative science, and that is exactly the environment that CERN wants to create for them by organizing the Beamline for Schools (BL4S) competition. CERN is well known for the discovery of the Higgs boson and the invention of the World Wide Web, but there is much more to the laboratory than that. A large part of CERN’s research and development is carried out at so-called fixed-target beamlines, where particle beams are available for different types of experiments. These projects range from probing the mysteries of antimatter to the testing of new generations of particle detectors.

From the first edition in 2014 until 2018, the winners of the BL4S competition have
performed their experiments at the PS accelerator of CERN, door to door with senior physicists and engineers. For the professionals as much as for the participants of Beamline for Schools, 2019 brought some change. The PS as well as all other accelerators at CERN had been stopped for maintenance until the end of 2021.

In order to continue BL4S, CERN teamed up with DESY, Hamburg, the German national laboratory for particle physics, accelerators and photon science. Links between CERN
and DESY have traditionally been strong and researchers of either organization participate actively in the research programs of the other. Between 2019 and 2021 the Beamline for Schools winning experiments had been successfully performed at DESY.

In 2022 the competition is back to CERN and the winners will be welcomed again in one of the newly renewed beamlines available at the PS accelerator. The winning teams will be guided and supported by experts from CERN in the implementation of their experiments.

BL4S is open to high-school students of age 16 and older who, if they win, are invited (with up to two supervisors) to CERN to run their experiment. Teams must have at least five students but there is no upper limit to a team’s size, although just nine students per winning team will be invited to CERN. Teams may be composed of students from a single school or from a number of schools working together (even from different countries).

To participate, teams should read carefully the information about the beamline and experimental facilities (, and describe in their proposals why they think they should win the chance to carry out their experiment at one of the world’s leading laboratories for particle physics. The teams are encouraged to ask their teachers or professional physicists (e.g. from a nearby university, or from the list provided here: bl4s-competition/national-contacts) for help in choosing a
subject or/and to discuss with them the feasibility of an idea they had themselves.

Alternatively, the teams can pick one of the example experiments ( and work it out in detail. We are not necessarily expecting to receive fully developed experimental proposals. However, there is no limit for your own ideas and suggestions of alternative experiments.  Experience shows that effort will pay out. BL4S will offer support to teams while they are preparing their proposals. The main objective of the competition is that the students increase their knowledge about physics while working together on their idea.


Online registration (optional) is already open. By registering the name of the team, the country and the email address of the team’s coach, you will give us the possibility to provide you with additional information such as supplementary documentation, mail addresses of physicists that you may contact for help or reminders of deadlines, and invitations to special events that we are organizing before the proposal submission deadline. Please note that you are not supposed to have a proposal ready when you register your team.

Registration will require:
1. Team name
2. Country/countries
3. Email address of the team coaches

Proposal submission
This is the mandatory step for a team to take part in the competition. The teams have to provide information about the team and its members, contact details and, very

I. A written proposal of up to 1000 words that explains:
a. Briefly (around 100 words) why you want to participate
b. In detail (around 800 words) how you would like to use the particle beamline for your experiment.
c. Briefly (around 100 words) what you hope to take away from the experience.

II. A 1-minute video that summarizes your written proposal in an original, creative, entertaining way and introduces the members of the team (get inspired by the videos of previous participants). Note that the video is not mandatory, but encouraged.

The proposal has to be submitted by an adult, usually the team coach. Note that for the selection of the winners, only the written proposal will be judged. The written proposal will be evaluated according to the following criteria:
• Feasibility of the experiment
• Motivation of the experiment and why you want to participate
• Creativity of the experiment
• Your ability to follow the scientific method

The submission must be in English. However, BL4S provides contact persons in several countries to respond to questions in the national language(s). The submission of the proposals will close at midnight CET on 15 April 2022. The proposals will be evaluated by a committee of senior scientists. The winners will be notified in June 2022.

Prizes (intended prizes without liability)

First prize:

The first prize is a trip of about two weeks to CERN to carry out your experiment in autumn 2022. Two teams are selected and each winning team can have a maximum of 11 people (nine students and up to two accompanying adults). BL4S will cover the full costs including travel, accommodation and meals. Members of the team that do not come to CERN will still be able to take part in the data analysis and participate in the experiment via the exchange of web-based data and videoconferences.

Second prize:
The teams that make it with their proposals into the shortlist will receive a selection of prizes that might include: a portable particle detector for their school, and BL4S T-shirts
for each team member. The team that will realize the best video proposal will be included in the short list!

Participation Certificates:
All members of a team that submits a complete proposal receive a certificate of participation.
You can find out more about the prizes here.

All complete proposals that were submitted on time, or extracts from them, may be
showcased on the websites of CERN and used for their outreach purposes after the
competition closes.

Please take the time to read the
terms and conditions applicable to the Beamline for Schools competition.

Intrigued? Discover the competition and join the adventure! Find more inspiring videos
in our Video Section. Enjoy!

Useful information about the BL4S competition at a glance:
Beamline for Schools Website:
Our mail address:
Information in your own language and other useful documents:
How to take part:

Good luck! We are looking forward to meeting you!