# Tag Info

This is not an answer it's a long comment, followed by advice. First of all let me say that IMHO this is a very specialized topic (and I've worked at a high power (20 GW) attosecond laser facility, and the lowest pressure I've come across in an experiment was at about $10^-7$ mbar). IMHO you are approaching it from the wrong angle. I think you should first :...