Scaling of the Plasma Focus – Viewpoint from DynamicsLee, S (1998) Scaling of the Plasma Focus – Viewpoint from Dynamics. In: International Workshop on Plasma Focus Research (PF 98), July 1998, Kudowa, Poland. Full text available as:
AbstractThe gross dynamics of the plasma focus is discussed in terms of phases. The dynamics of the axial and radial phases is computed using repectively a snowplow and an elongating slug model. A reflected shock phase follows, giving the maximum compression configuration of the plasma focus pinch. An expanded column phase is used to complete the post-focus electric current computation. Parameters of the gross focus pinch obtained from the computation, supplemented by experiments are summarised as follows: Deuterium Neon (for SXR) minimum radius rmin 0.13a 0.04a maximum length z 0.7a 0.8a radial shock transit tcomp 5x10^-6a 4x10^-6a pinch lifetime tp 2x10^-6a 1x10^-6a where, for the times in sec, the value of anode radius, a, is in m. For the neon calculations radiative terms are included. The scaling suggests a speed enhancement effect on neutron yield, enhancing from the conventional I^4 to a superior I^8 scaling law.
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