Fig. 1. Core soft X-ray (SXR) intensity ISXR of plasma with sawtooth oscillation in the EAST device. t1 and t2 are the time point before and after sawtooth crash, respectively, and t₃ is the time point just after the next sawtooth crash

Fig. 2. The SXR profile curve of the moment just before and after the sawtooth crash (the X-coordinate is the Z-direction on the cross section of EAST)

Fig. 3. Changing curve of the soft X-ray intensity and neutron yield flux and other parameters of the EAST device #111906 shot under ICRF heating: time sequences curve of (a) plasma current, (b) electron density, (c) electron temperature, (d) the ICRF power, (e) neutron yield flux, and (f) soft X-ray intensity and (g) zoomed figure of the signal in the rectangular box in (f)

Fig. 4. Sawtooth period, amplitude, and other parameter changing with time before and after ICRF heating in the EAST device # 111906 shot: variation curve of

Fig. 5. Plasma current density profile of the moments before and after ICRF heating in the EAST device #111906 shot. Curve marked by squares represents the total current density before injecting ICRF, while the one marked by triangles stands for the total current density after injecting 0.8 MW ICRF

Fig. 6. Changing curve of soft X-ray intensity, neutron yield flux, and other parameters of the EAST device #109016 shot with ICRF heating: time sequences curve of (a) plasma current, (b) electron density, (c) electron temperature, (d) power of ICRF, (e) neutron yield flux, and (f) soft X-ray intensity and (g) zoomed figure of the signal in the rectangular box in (f)

Fig. 7. Sawtooth period, amplitude, and other parameters changing with time under different ICRF heating power in the EAST device #109016 shot: variation curve of (a) sawtooth period, (b) sawtooth amplitude, (c) plasma pressure gradient at q=1 surface, and (d) q=1 surface radius

Fig. 8. Under different heating conditions in the EAST device, the curve of (a) sawtooth period, (b) sawtooth amplitude, (c) plasma pressure gradient at q=1 surface, (d) q=1 surface radius changing with ICRF power