Development of an Innovative Mix-Probe for Spatio-Temporal Measurements of Vorticity Fluctuations in the IR-T1 Tokamak

Abstract In this paper, Mix- Probe is designed and fabricated for the first time in IR-T1 Tokamak. The spatio-temporal variation of vorticity fluctuations (\({~}{ω })\), blob size, velocity, radial turbulent transport ( \({{~}{{Γ }}}ᵣ)\), and electron temperature can be measured by this probe. The emphasis of this paper is on measuring. \({{~}{I}}ₛₐₜ\) at the edge of the IR-T1 tokamak. The data collected by a Mix- Probe was analyzed using various methods such as Fast Fourier Transport (FFT), spectrogram, and cross-correlation. \({{~}{I}}ₛₐₜ\) behaves differently compared to \({~}{ω }\). Roughly in the region where \({~}{ω }\) have maximum amplitude, amplitude of \({{~}{I}}ₛₐₜ\) is reduced. By calculating the shearing rate ( \({γ }E× B\)), it was observed that the typical patterns of \({~}{ω }\) and \({γ }E× B\) are similar. \({{~}{I}}ₛₐₜ\) exhibits distinct behavior when compared to \({γ }E× B\). When \({γ }E× B\) reaches its maximum, \({~}{ω }\) also reaches its peak, but \({{~}{I}}ₛₐₜ\)remains at a minimum. Moreover, the cross correlation between \({~}{ω }\) and \({{~}{{Γ }}}ᵣ\) was higher than the cross correlation between \({{~}{I}}ₛₐₜ\) and \({{~}{{Γ }}}ᵣ\), as observed by calculating cross correlation.