EVOLUTION OF CURRENT LOOPS IN-SPACE

Ampere's law requires that every magnetic field have an associated cur rent. The analysis of magnetic fields in this paper begins with that c urrent in a circular loop and calculates the forces that make the loop evolve. A circular current generates a dipole field; and a second-ord er, ordinary differential equation represents the evolving magetic fie ld. The theory describes cases where the conductor shrinks as the loop increases in size. The temperature of the conducting ions and electro ns then decreases. The theory also describes cases where the conductor grows as the loop grows. Then the conducting particles heat up.Analys is shows that the magnetic clouds in the solar wind belong to the firs t type. In the provisional model adopted, the Klein-Burlaga clouds at one astronomical unit have a toroidal shape, centered on the sun, with a conductor radius of .125 au, and temperature (same for conducting e lectrons and protons) of 10(5) K. After 26 days the toroid has a radiu s of 7.1 au, the conductor radius is .025 au, and the temperature is 2 600 K.