Theoretical and Experimental Investigation of Effects of Toroidal Field Ripple on Poloidal Beta, Internal Inductance and Shafranov Shift in IR-T1 Tokamak

In this paper we presented an investigation of effects of the toroidal field ripple (TF ripple) (due to finite number of the toroidal field coils) on the poloidal beta, internal inductance, and Shafranov shift in IR-T1 Tokamak. For these purposes, array of magnetic probes and also a diamagnetic loop with its compensation coil were designed, constructed and installed on outer surface of the IR-T1. Amplitude of the TF ripple is obtained 0.01, and also the effects of TF ripple on the poloidal beta, internal inductance, and Shafranov shift were discussed. In the high field side region of tokamak chamber, the TF ripple effects is the decreasing and increasing of the poloidal beta and internal inductance, respectively, whereas the low field side have inverse situations. Also no sensible variation observed in the Shafranov shift due to TF ripple on IR-T1 plasma.