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http://dx.doi.org/10.1016/j.net.2016.02.003

Study of Lower Hybrid Current Drive for the Demonstration Reactor  

Molavi-Choobini, Ali Asghar (Department of Physics, Faculty of Engineering, Islamic Azad University)
Naghidokht, Ahmad (Department of Physics, Urmia University)
Karami, Zahra (Department of Engineering, Islamic Azad University)
Publication Information
Nuclear Engineering and Technology / v.48, no.3, 2016 , pp. 711-718 More about this Journal
Abstract
Steady-state operation of a fusion power plant requires external current drive to minimize the power requirements, and a high fraction of bootstrap current is required. One of the external sources for current drive is lower hybrid current drive, which has been widely applied in many tokamaks. Here, using lower hybrid simulation code, we calculate electron distribution function, electron currents and phase velocity changes for two options of demonstration reactor at the launched lower hybrid wave frequency 5 GHz. Two plasma scenarios pertaining to two different demonstration reactor options, known as pulsed (Option 1) and steady-state (Option 2) models, have been analyzed. We perceive that electron currents have major peaks near the edge of plasma for both options but with higher efficiency for Option 1, although we have access to wider, more peripheral regions for Option 2. Regarding the electron distribution function, major perturbations are at positive velocities for both options for flux surface 16 and at negative velocities for both options for flux surface 64.
Keywords
Current Drive; Demonstration Reactor; Fokker-Planck Equation; Lower Hybrid Waves;
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