Ultrafast, Redundant, and Unpolarized DC Energy Extraction Systems for the Protection of Superconducting Magnet Circuits. - Piotr Borkowski; Marek Bartosik; Michal Rodak; Adrian Sienicki; Franciszek Wójcik; Bozhidar Panev; Félix Rodriguez-Mateos; Andrzej Siemko (IEEE Trans. Ind. Electron., 2022)