Self-organization of the critical state in a two-dimensional multijunctionSQUID under closed boundary conditions

A model of a closed system with self-organization is presented. This is a s implified model of a multijunction SQUID in an ac magnetic field. In our cl osed system, a self-organized critical state is realized on account of the fact that current dumping, which gives rise to self-organization in open sy stems, is replaced here by a fundamentally different mechanism - annihilati on of the currents. (C) 1999 American Institute of Physics. [S0021-3640(99) 00802-6].