You might be interested to learn about a couple actual trained spies. guess what they were accused of?
Treason is not what you think it is. Its a nice word to throw around when you are angry at someone but it has a very specific meaning.

In the image of the discharge you can clearly see that the device has no cladding. That means a discharge would be limited to a duration of a few seconds, otherwise the material ablated from the wall would lead to extreme heat losses of the plasma. Did they include a future vessel cladding to the plasma volume calculation in the article?

The newer designs that use very long, filament-attached LEDs in a large helium filled glass bulb also work quite well, even in a classical light fixture. The helium filling helps with cooling because helium has higher convective heat transfer than air.

doesn’t work if you have AltGr