Anode Shape and Hollow Effects on Neutron Yield in a 4.4 kJ Dense Plasma Focus Device*

Dense Plasma Focus (DPF) is a Z-pinch configuration that consists of coaxial electrodes that guide a dynamic plasma sheath along the anode, resulting in a hot dense pinch near the anode tip. A DPF can produce X-rays, energetic ions, and high intensity fast neutron pulses depending on the fill gas. We report on experiments using a 4.4 kJ Mather-type DPF exploring the role of anode geometry with a focus on curved and flat anodes with and without a hollow center, such as highlighted in recent studies^1,2. The dynamics of the collapsing plasma are described in terms of the contribution of anode geometry and deuterium pressure. The resulting pinch structure is quantified optically and neutron yields, as measured by a Be-activation detector, will be described.

1. A. Link et al., AIP Conf. Proc. 1639, 23 (2014)

2. B. H. Shaw et al., J. Appl. Phys. 124, 233301 (2018)