A proton (positive charge, red) and an anti-proton (negative charge, blue) move in a magnetic field B = 10-3 T i. At t = 0 both particles are at x = y = z = 0. You can choose the initial velocity components of the particles in units of 103 m/s. The tick marks on the axes are spaced in units of cm, and at a screen refresh rate of 60 Hz one second of real time represents ~ 0 microseconds of animation time.
Use the mouse to change your viewing angle and zoom in or out.