Numerical experiments using the Lee model code were carried out to compute the total D-D fusion neutron yield versus initial deuterium pressure for nine different plasma focus devices [PF50, AACS, PF400J, PF2.2, UNU-ICTP, PFZ200, PF24, PF78, Poseidon]. The computed data were compared with the published experimental results. In addition, the maximum discharge current, the pinch current and the pinch ion number density as a function of initial deuterium pressure were discussed as well as their effect on the neutron yield. The optimum pressures that correspond to the maximum neutron yield Yn were obtained for all considered devices, with reference to the specific plasma focus properties. The scaling laws for the D-D fusion neutron production, in terms of storage energies E0 and pinch current Ipinch were derived. The scaling of Yn with Ipinch and E0 over the whole range of investigated energies up to 300 kJ has been obtained as follows: (Y_n~I_pinch^5 ,Y_n~E_0^1.95 ). These laws are important for planning and designing a plasma focus as a potentially powerful pulse neutron source.

In this study, numerical experiments on ion beam features emitted from nine Dense Plasma Focus devices were carried out using the Lee model code (version RADPFV5.16FIB). A simulation (numerical experiment) and connected fitting procedure of a total discharge current waveform was presented on the example of the PF-24 device, and summary data concerning simulations and fitting procedures for each device were presented. The full details of the ion beam properties as a function of pressure for the PF24 device were presented. The properties of deuterons such as flux, fluence, flux energy, fluence energy, current density, ion current, damage factor, and energy of deuterons versus pressure were computed and investigated. A comparison between the properties of deuterons computed at fitted pressure and at a pressure where the flux is the highest was presented and discussed according to equations on which the Lee model is based.