Author(s)

Ali Asghar Molavi Choobini^1*, Ahmad Naghidokht², Zahra Karami³

¹Shahrekord Branch, Sama Technical and Vocational Training College, Islamic Azad University, Shahrekord, Iran.
²Department of Physics, Isfahan University of Technology, Isfahan, Iran.
³Zanjan Branch, Department of Engineering, Islamic Azad University, Zanjan, Iran.

Lower hybrid (LH) wave is not only convenient to generate a flat or reversed magnetic shear profiles, but also helps one to explore scenarios for steady-state tokamak operation with improved confinement. Here with LSC code (lower hybrid simulation code), we calculate density and temperature profiles, relative power of injected wave and current wave lunch for two options of DEMO at the launched LH wave frequency 5 GHz. Two plasma scenarios pertaining to two different DEMO options, known as pulsed (option 1) and steady-state (option 2) models, have been analyzed. We perceive that power deposition by using lower hybrid wave injection mainly takes place near the edge of plasma and approximately in more peripheral region for both of options but has approximately higher efficiency for option 1 compared to option 2. About current wave lunch, a major part of that is close to the plasma edge for both of options. We have some considerable parts that reach to internal layers for option 1 and then current drive mainly takes place in a wider, more peripheral region for option 1.

Lower Hybrid Waves, Tokamak, Current Drive, Fokker-Planck Equation

Choobini, A. , Naghidokht, A. and Karami, Z. (2014) Simulation of Lower Hybrid Current Drive for DEMO. World Journal of Nuclear Science and Technology, 4, 189-194. doi: 10.4236/wjnst.2014.44024.