Reply To: NIMBY FUD

[asymmetric_implosion]

I’ve worked with SRS RGA’s in the past. You can do gas sampling or leak checking down to the 1E-9 Torr range with ease. The key problems we’ve encountered (not on PF devices) are sensitivity to plasma environment as one might expect, electronics problems with pulse plasmas (200A, 100 ms), disruption of the comm link to the computer and the variable maintenance cycle (depends on what deposits where and when).

I think most of the problems are universal and could be dealt with using proper electronic and vacuum isolation. I don’t know if you could run the RGA with the PF on-line but some sort of He monitoring on-line will probably be required down the road so might as well find the problems now. SRS software is straightforward to use. I learned it in about 20 minutes so I could do leak checking and base vacuum analysis. SRS is pretty good about maintenance but it does cost. I recommend their 100 AMU model for FoFu-1. Most of the key gases are less than 50 AMU.