Ehst Lower Hybrid

• iefrf/iefrffix = 4 $$ \text{Current drive efficiency [A/W]} = \frac{T_{\text{e}}^{0.77} (0.034 + 0.196\beta)}{R_0 n_{\text{e},20}}\frac{\frac{32}{5+Z_{\text{eff}}}+2+\frac{\frac{12\left(6+Z_{\text{eff}}\right)}{5+Z_{\text{eff}}}}{3+Z_{\text{eff}}}+\frac{3.76}{Z_{\text{eff}}}}{12.507} $$