Magnetic field generation by periodic helical deformation in RFP

Summary form only given. Effects of periodic helical deformations on the dynamo mechanism in RFP are examined using a simple electric circuit model. Modeling the plasma to toroidal and poloidal current channels, we use the method which switches mutual inductance matrices discontinuously on the condition conserving magnetic flux to simulate periodic onset and extinction of helical deformations. Modeling the plasma to toroidal and poloidal current channels, circuit parameters of mutual inductance matrices in case of symmetric and asymmetric (helical) plasma are derived. To simulate periodic onset and extinction of helical deformations, we use the method of switching these two mutual inductance matrices on the condition conserving magnetic flux of each circuits.