oscilloscope turning off during pulsed power tests
A high power pulse generator is effectively an EMP device. You need to shield both the computer and UPS from the EMP, both electrostatically (e.g. screen Faraday shield) and magnetically (e.g steel or mu-metal enclosure). It would also be useful to shield the input cables, but since at least some part of them must extend outside the enclosure, they should connect only through feed-through ports with a solid common ground to the enclosure. You'll also need to calculate how much energy the cables pick up -- you may need to create some means to bypass common-mode pickup or to route the cables through metal conduit.