Abstract
Neutron yield is enhanced by reduction of the short-circuit plasma focus inductance $L_{\mathrm { {0}}}$ , which in turn increases the pinch current $I_{\mathrm { {pinch}}}$ . Numerical experiments are carried out to optimize the neutron production using the Lee model on small plasma focus devices (several kilojoules), such as UNU/ICTP PFF, NX2, and LDiana. The maximum neutron yield is obtained for each $L_{\mathrm { {0}}}$ with a combination of gas pressure as well as anode length and radius ( $Y_{n}$ versus $z_{\mathrm { {0}}}$ , $p_{\mathrm { {0}}}$ and $a$ at fixed $L_{\mathrm { {0}}})$ . The numerical experiments confirm the limitation effect of $I_{\mathrm { {pinch}}}$ , and suggest an optimum $L_{\mathrm { {0}}}$ in the range of 10–20 nH. Finally, the neutron yield is scaled with system inductance.
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