Lec 13 MIT 8 02 Electricity and Magnetism Spring 2002

Description: the radius, of course, is even larger and so very gradually every time that it reaches the gap the potential difference is changed in direction to accelerate the proton and so it gradually spirals out, then, to the largest radius that you have. So during one full rotation it gains 20 kilo electron volts once, and 20 kilo electron volts twice, so it gains 40 kilo electron volts. And so the electric fields are doing the work. They accelerate the particles. Magnetic fields cannot accelerate ...