IS THE BEAN CRITICAL-STATE SELF-ORGANIZED

A simple one dimensional model to simulate the establishment of the Be an critical state is introduced. It is shown that the dynamics of the flux lines as they enter the superconductor are dominated by 'avalanch es'. The distribution of distances moved by vortices in the avalanches obeys a power law with an exponent of -1. This suggests that the Bean state is a self-organised critical state. The density of flux lines i s parabolic.