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Zhe WANG, Zhen SUN, Guizhong ZUO, Kai WU, Yao HUANG, Wei XU, Ming HUANG, Zhitai ZHOU, Yanhong GUAN, Haotian QIU, Rajesh MAINGI, Jiansheng HU. Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall[J]. Plasma Science and Technology, 2024, 26(12): 125105. DOI: 10.1088/2058-6272/ad811f
Citation: Zhe WANG, Zhen SUN, Guizhong ZUO, Kai WU, Yao HUANG, Wei XU, Ming HUANG, Zhitai ZHOU, Yanhong GUAN, Haotian QIU, Rajesh MAINGI, Jiansheng HU. Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall[J]. Plasma Science and Technology, 2024, 26(12): 125105. DOI: 10.1088/2058-6272/ad811f

Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall

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  • A feedback control of fuel recycling via real-time boron powder injection, addressing the issue of continuously increasing recycling in long-pulse plasma discharges, has been successfully developed and implemented on EAST tokamak. The feedback control system includes four main parts: the impurity powder dropper (IPD), a diagnostic system measuring fuel recycling level represented by Dα emission, a plasma control system (PCS) implementing the Proportional Integral Derivative (PID) algorithm, and a signal converter connecting the IPD and PCS. Based on this control system, both active control and feedback control experiments have recently been performed on EAST with a full metal wall. The experimental results show that the fuel recycling can be gradually reduced to lower level as PCS control voltage increases. In the feedback control experiments, it is also observed that the Dα emission is reduced to the level below the target Dα value by adjusting boron injection flow rate, indicating successful implementation of the fuel recycling feedback control on EAST. This technique provides a new method for fuel recycling control of long pulse and high parameter plasma operations in future fusion devices.

  • This research was funded by the National Key Research and Development Program of China (Nos. 2022YFE03130000 and 2022YFE03130003), National Natural Science Foundation of China (Nos. 12205336 and 12475208), The Strategic Priority Research Program of Chinese Academy of Sciences (No. XDB0790102), the Provincial Natural Science Foundation of Anhui (No. 2408085J002), and Interdisciplinary and Collaborative Teams of CAS.

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