1. [1] O. Mitarai “A D-3He spherical tokamak reactor with the plasma current ramp-up by vertical field” in Nuclear Reactors, Nuclear Fusion and Fusion Engineering (Nova Science Publishers, Inc., 2009), Edited by A. Aasen and P. Olsson.
2. [2] O. Mitarai et al., Plasma Fusion Res. 2, 021 (2007).
3. [3] O. Mitarai et al., Plasma Fusion Res. 5, S1001 (2010).
4. [4] J. Mandrekas et al., Fusion Technol. 19, 57 (1991).
5. [5] T. Watanabe et al., Plasma Fusion Res. 9, 3403089 (2014).