A cyclotron is a machine with a pair of large disc magnets that is used to store a beam of protons with a kinetic energy of 3 MeV. The cyclotron radius (the radius of the magnets) is 5 m. What magnitude of magnetic tield is required to store the protons at the outer edge of the magnet? Number Tesla If you are looking down at the cyclotron and the particles are observed to move in the clockwise direction, what will be the direction of the magnetic field? 0 towards the sky 0 towards the ground