Figure 1

Radial profiles of the electron temperature when the ECH is applied and not applied for (a) deuterium plasmas and (b) hydrogen plasmas; (c) the peak-to-peak modulation amplitude of the electron temperature gradient and (d) the incremental heat diffusivity as a function of the applied ECH power normalized by the line averaged density. Magnitude of the profile variation \(|\delta T_{\mathrm{e}}|\) defined as difference between the ECH-on and ECH-off profiles is plotted by purple symbols with the Lorentzian fit in (a) and (b).