Plasma Core Power Balance

The figure below shows the flow of power as calculated by the code.

Figure 1: Machine build for D-shaped major components

The primary sources of power are the fusion reactions themselves, ohmic power due to resistive heating within the plasma, and any auxiliary power provided for heating and current drive. The power carried by the fusion-generated neutrons is lost from the plasma, but is deposited in the surrounding material. A fraction f_alpha_plasma of the alpha particle power is assumed to stay within the plasma core to contribute to the plasma power balance. The sum of this core alpha power, any power carried by non-alpha charged particles, the ohmic power and any injected power, is converted into charged particle transport power ($P_{\mbox{loss}}$) plus core radiation power, as shown in the Figure. The core power balance calculation is turned on using constraint equation no. 2 (which should therefore always be used).