“…Other models calculating the Vircator power are available in the literature but have not been used to determine the Vircator boundaries [12]- [14]. These models define the system response as a function of the design parameters [11], [14] [Voltage (V ), anode-cathode gap (d), cathode radius (r c ), drift-tube radius (r dt ), and Anode transparency (T a ), see Fig. 1], or as a function of dependent variables [12], [13].…”