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用软X射线二极管阵列可以很容易地探测到在等离子体内部形成的软X射线辐射扰动的锯齿振荡波形,根据观测到的锯齿振荡的某些特征可以定性地确定等离子体芯部的磁场位形。在托卡马克等离子体加热过程中,电子加热和电流穿透使得电流分布不断峰化、中心磁轴附近的安全因子下降,当中心安全因子q(O)<1时在q=1磁面附近形成磁岛,磁岛的增长
The sawtooth oscillation waveform of perturbations of the soft X-ray radiation formed inside the plasma can be easily detected using a soft X-ray diode array. Based on some observed characteristics of the sawtooth oscillation, the magnetic field configuration of the plasma core can be qualitatively determined . During tokamak plasma heating, electron heating and current breakthrough cause the current distribution to peaking, and the safety factor near the central magnetic axis decreases. When the central safety factor q (0) <1 is near the q = 1 magnetic surface The formation of magnetic islands, magnetic island growth