A megawatt-level 28 GHz heating system for the National Spherical Torus Experiment Upgrade oleh Taylor G., Ellis R.A., Fredd E., Gerhardt S. P., Greenough N., Harvey R. W., Hosea J. C., Parker R., Poli F., Raman R., Shiraiwa S., Smirnov A. P., Terry D., Wallace G., Wukitch S.