1. Sustainable Energy Technologies Center; King Saud University; P.O. BOX 800 Riyadh 11421 Saudi Arabia
2. Department of Chemical Engineering, College of Engineering; King Saud University; P.O. BOX 800 Riyadh 11421 Saudi Arabia
3. Tokamak Design Division, Institute of Plasma Physics; Chinese Academy of Sciences; Hefei P.R. China