The Influence of Physics Parameters on Tokamak Reactor Design

Multiple wave radio frequency current driven tokamak reactors in the first stability regime

“…The electron and ion densities and temperatures are expected to be major determinants of PCD > needed to generate a reactor equilibrium. These plasma parameters are obtained using a profile averaged, steady state power balance as found with the TRAC-II computer code [17]. The density and temperature profiles of the j-th species are simple functions:…”

Economic comparison of MHD equilibrium options for advanced steady state tokamak power plants

“…Only at temperatures substantially above 20 keV does the increase of R 0 and I 0 withT e tend to set an upper limit to Q E . (We note that pulsed tokamaks, unlike steady state power plants, are not burdened by the RFCD power requirement, and they would tend to optimize [18] at lower temperatures, 6 < ∼Te (keV) < ∼ 10, where fusion reactivity and MPD maximize. )…”

“…At lowT e the RFCD input power is large (due to small γ B values), which results in strongly driven fusion plasmas which need only modest values of τ E e ; for our assumptions, a value of Q E = 1.78 corresponds to P CD ∼ = 725 MW, which equals the alpha heating power. However, higherT e operation increases the radiation power losses and reduces the RFCD power so that, as with ignited plasmas [18], the required τ E e increases quickly. The role of toroidal current in confinement may further affect the design point optimization.…”

Plasma-gun fueling for tokamak reactors

“…where U is in joules, L^ and r^ are in centimeters, p is in g/cm 3 Of greater concern is possible cathode sputtering and vaporization from energetic particle bombardment during the discharge of the gun. Cathode erosion and impurity generation can be minimized by properly programming the (23) gas injection and current discharge in the gun, and the detrimental effects of impurity generation can be lessened by the judicious choice of cathode materials (e.g., low-Z metals such as beryllium).…”