Beamline for Schools (BL4S)is a physics competition open to high-school students from all over the world. The participants are invited to submit their proposals for an experiment that uses a beamline. Beamlines are facilities that provide fluxes of subatomic particles that scientists use to conduct experiments in different fields spanning fundamental physics, medicine and material science. Operating a beamline requires particle accelerators like those running at CERN and DESY..
Find out more about the beamline and the facilities available for the competition at http://cern.ch/bl4s.