2) Tube: cathode radius b = 4.1cm, anode radius 
a =1.9 cm and anode length z0 = 5 cm.
3) Operation: voltage V0 = 11 kV, pressure P0 = 
3 torr Neon, MW=20, A=10, At-Mol=1.4) Model: fm=0.1, fc=0.7, fmr=0.12, fcr=0.68.