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Observation of non-local effects in ion transport channel in J-TEXT plasmas

  • Author(s): Shi, Y;
  • Yang, Z;
  • Chen, Z;
  • Cheng, Z;
  • Zhang, X;
  • Yan, W;
  • Wen, J;
  • Cai, Q;
  • Zhao, K;
  • Hong, S;
  • Kwon, J;
  • Diamond, PH;
  • Shi, P;
  • Zhou, H;
  • Pan, X;
  • Chen, Z;
  • Yang, S;
  • Dong, Y;
  • Wang, L;
  • Ding, Y;
  • Liang, Y;
  • Shi, Z;
  • Na, YS
  • et al.

In cold pulse experiments in J-TEXT, the ion transport shows similar non-local response as the electron transport channel. Very fast ion temperature decreases are observed in the edge, while the ion temperature in the core promptly begin to rise after the injection of cold pulse. Moreover, the cutoff density is also found for the ion non-local effect. The experimental observed density fluctuation in a high frequency ranging from 500 kHz to 2 MHz is obviously reduced in the whole plasma region during non-local transport phase.

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