Dr. Yitzhak Fouxon ，Ben-Gurion University， Israel

We will consider the problem of the growth of small seed
fluctuations of the magnetic field in the turbulent flow of a conducting
fluid. We will demonstrate that the so-called sonic scale plays a
crucial role and provide some theoretical results obtained in the frame
of the Kraichnan model. The case where the seed fluctuations are
concentrated at the smallest scales of turbulence (below the viscous
scale) allows consideration that does not use any model and applies to
the Navier-Stokes turbulence.