Chapter 29, Problem 66EAP

Particle accelerators, such as the Large Hadron Collider. use magnetic fields to steer charged particles around a ring. Consider a proton ring with 36 identical bending magnets connected by straight segments. The protons move along a 1.0-rn-long circular arc as they pass through each magnet. What magnetic field strength is needed in each magnet to steer protons around the ring with a speed of $2.5\times {10}^7$m/s? Assume that the field is uniform inside the magnet, zero outside.