The simulation showed that the ratio of fusion yield/gross input energy rose from 0.067% at 0.75MA to 5% at 1MA to 24% at 1.5MA. The optimum case studied is for a current of 2.0 MA, cathode radius 3.3 cm, and final magnetic field 12 GG. This simulation case produced a beam that carried 97% of input energy and x-rays that carry 57% of input energy. In practical terms this means that if the beam energy recovery efficiency is 90%, which is reasonable, net energy production occurs with x-ray energy recovery rates above 22%, which is easily achievable. Another practical energy-producing combination simulated used an 80% beam recovery and 80% x-ray recovery for an overall efficiency of 43%. In this example, the net electric energy production is 3.1 kJ per pulse or 3.1 MW for a 1 kHz pulse rate.
This is rather grave, if I