- 100 -


                    F(C2) - 1 = 0                   (5.62)

where

                        +                 c_2 K(
F (C 2  VIR /W(C2 + C 2 +                 CCK+
                     3     RC2)            K

                       C2
                    +   e + C 2)                    (5.63)
                       K1


The positive root of equation (5.62) gives the concentration of atomic hydrogen. R is then evaluated from (5.61) and the electron concentration from (5.60). The remaining constituents of the hydrogen plasma are calculated from (5.59). Equation (5.62) is solved by iterating on C2 until IF(C2) - 1 < -2, where E2 is the desired convergence.


High Temperature Equations

        The solutions to the intermediate temperature

equations (5.53) and (5.54) become divergent above sufficently high temperatures, the value of the temperature limit depending on the pressure. Above this limit, the errors in the particle concentrations increase rapidly as the temperature increases. The errors are associated with the difficulty of accurately calculating the H2 density, since most of the diatomic hydrogen is dissociated at high temperatures. The concentrations of all other hydrogen species are very sensitive to the H2 concentration,