[1] Univ Alberta, Edmonton, AB, Canada
[2] North Dakota State Univ, Fargo, ND USA
[3] Indian Inst Technol Kanpur, Kanpur, Uttar Pradesh, India
[4] Czech Acad Sci, Inst Plasma Phys, Prague, Czech Republic
[5] Tampere Univ Technol, Tampere, Finland
[6] GE Power & Water, Schenectady, NY USA
[7] Ningbo Inst Mat Technol & Engn CAS, Ningbo, Zhejiang, Peoples R China
[8] Fraunhofer Inst IWS, Dresden, Germany