A Model of Solar Dynamo with Alternative Conversion of Large-Scale Magnetic Field and Production of Sunspots

Since the discovery of solar cycle related with magnetic field in 1908, deep seated oscillatory dynamo has been studied extensively. However, there are still open questions on the solar dynamo, e.g., asymmetric conversion between large-scale poloidal and toroidal field as well as physics underlying the butterfly pattern of sunspots. Here we report a new generation of large-scale magnetic field and process of energy release. The inductive action of fluid motions pervading the solar interior is represented by a RLC circuit in which the toroidal field built up through twisting of poloidal field, so called $\omega$-effect, plays the role of a capacitor. Such a RLC circuit not only provides a self-sustained oscillatory system avoiding Cowling's antidynamo theorem, but also site of rapid magnetic reconnection which reproduces quadrupole magnetic field interpreting the behavior of sunspots and moving of foot-point in solar activities. Moreover, parameters of the circuit and the Sun are well consistent with the 22-year solar cycle.