LPPFusion Dense Plasma Focus has been around since the 60's including some high power Z machines exploring the science and technology.
https://en.wikipedia.org/wiki/Dense_plasma_focus#Lawrenceville_Plasma_Physics
https://en.wikipedia.org/wiki/Z_Pulsed_Power_Facility
https://en.wikipedia.org/wiki/Dense_plasma_focus#Lawrenceville_Plasma_Physics
https://en.wikipedia.org/wiki/Z_Pulsed_Power_Facility