Issues regarding plasma equilibrium control in helical systems are overviewed focusing on the control of plasma cross-sectional shape and bootstrap current in high-temperature helical plasmas. The role and characteristics of equilibrium control in helical devices are described first, and the definitions of magnetic configuration parameters of three-dimensional helical plasmas are given in the following section. Typical examples of equilibrium control in the present medium-sized helical systems are then described, and the operational domain and the feedback control planning for LHD plasmas are shown in the final section.
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