I thought this was about the other Z-Machine at first: https://en.wikipedia.org/wiki/Z_Pulsed_Power_Facility
(used at Sandia for inertial confinement fusion)
(used at Sandia for inertial confinement fusion)
[1] https://youtu.be/lix-vr_AF38?t=3m12s
[2] https://lod.org