  The Lee model code is used in numerical experiments for characterizing and
optimizing neon soft X-ray (Ysxr) yield of UNU/ICTP PFF machine operated at 14
kV and 30 micro F. The neon Ysxr yield of the dense plasma focus device is
enhanced by reducing static inductance (L0) and anode length (z0) along with
increasing anode radius (a) and cathode radius (b), keeping their ratio (c =
b/a) constant at 3.368. At the optimum combination of the electrodes geometry
and static inductance, the maximum computed value of neon Ysxr yield is 63.61 J
at operating pressure 3.3 Torr with corresponding X-ray yield efficiency 2.16%,
while the end axial speed becomes 6.42 cm/s. This value of neon Ysxr yield is
twelve to thirteen times higher than the measured value (5.4 J) at 3.0 Torr. It
is also found that this neon Ysxr yield is improved around seven times from
previously computed value (9.5 J) at 3.5 Torr for optimum anode configuration
of this machine. Our obtained results of neon Ysxr yield are also compared with
the computed results of AECS-PF2 machine operated at 15 kV and 25 micro F and
is found that our results are about three times better than that from the
optimized AECS-PF2 at L0 = 15 nH.
