But isn`t the limit of 200 Torr arbitrary too? Why not setting a bit higher pressure higher yields? Won`t you try it? Have you estimated a function from when ionization disturbs?
BTW, the z=0.4 (cm) for z is arbitrary. Setting up a lower value up to zero (cannot write 0, but 0.00001, or something, you get the idea), doesn`t change the yield. So, isn`t there an insulator tha can do the same job with just 0.3 cm?
