Menno Lauret William Wehner Eugenio Schuster Christopher T. Holcomb Timothy C. Luce John R. Ferron Michael L. Walker 0004 David A. Humphreys Benjamin G. Penaflor Robert D. Johnson Current profile and energy control in DIII-D plasmas using discrete-time variable-structure control. 99-104 2017 MED https://doi.org/10.1109/MED.2017.7984102 conf/med/2017 db/conf/med/med2017.html#LauretWSHLF0HPJ17