In the latest episode of "Through the Wormhole, with Morgan Freeman", about 20 minutes in, there's a sequence filmed in a university lab where they're firing biological samples at high speed to see if they can survive meteor impacts. By the context, the sequence was apparently filmed recently. Anyway, there is a brief scene showing an equipment rack associated with the "gun", and there are two devices with Nixie tubes. Apparently still in active use!
Robert M Pfingston
pfing...@bellsouth.net