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LIU Xiaolong (刘晓龙), Kazuo NAKAMURA, Tatsuya YOSHISUE, Osamu MITARAI, Makoto HASEGAWA, Kazutoshi TOKUNAGA, XUE Erbing (薛二兵), Hideki ZUSHI, Kazuaki HANADA, Akihide FUJISAWA, Hiroshi IDEI, et al.. H Loop Shaping Control for Plasma Vertical Position Instability on QUEST[J]. Plasma Science and Technology, 2013, 15(3): 295-299. DOI: 10.1088/1009-0630/15/3/21
Citation: LIU Xiaolong (刘晓龙), Kazuo NAKAMURA, Tatsuya YOSHISUE, Osamu MITARAI, Makoto HASEGAWA, Kazutoshi TOKUNAGA, XUE Erbing (薛二兵), Hideki ZUSHI, Kazuaki HANADA, Akihide FUJISAWA, Hiroshi IDEI, et al.. H Loop Shaping Control for Plasma Vertical Position Instability on QUEST[J]. Plasma Science and Technology, 2013, 15(3): 295-299. DOI: 10.1088/1009-0630/15/3/21

H Loop Shaping Control for Plasma Vertical Position Instability on QUEST

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  • Received Date: January 15, 2012
  • QUEST has a divertor configuration with a high and a negative n-index, and the problem of plasma vertical position instability control in QUEST is still under extensive study for achieving high efficiency plasma. The instability we considered is that the toroidal plasma moves either up or down in the vacuum chamber until it meets the vessel wall and is extinguished. The actively controlled coils (HCU and HCL) outside the vacuum vessel are serially connected in feedback with a measurement of the plasma vertical position to provide stabilizing control. In this work, a robust controller is employed by using the loop synthesis method, and provides robust stability over a wide range of n-index. Moreover, the gain of the robust controller is lower than that of a typical proportional derivative (PD) controller in the operational frequency range; it indicates that the robust controller needs less power consumption than the PD controller does.
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