Spent this evening attempting fusion with the Fusor. No bubbles in the detector, but I got these photos of the deuterium plasma:
As you can see it’s a more of a blue color than the air plasma.
The pump is running fantastically… whisper quiet.
I tried for several hours. The main variable is gas flow rate. The more gas, the more current and a brighter plasma.
I may need a higher voltage power supply.
Judging from the reduced PSI of the deuterium bottle, I put a dent in the supply tonight.
All in all it was a good day. Nothing broke. We tool a step forward. I plan to regroup and spend some time working with the air plasma.
Prometheus Fusion Perfection 
[…] https://prometheusfusionperfection.com/2009/10/13/deuterium-plasma/ a few seconds ago from xmpp […]
The deuterium plasma should be a red/pink color which makes me suspect you have pump oil backstreaming which will also make it blue or an air leak.
http://www.fusor.net/board/view.php?bn=fusor_images&key=1255486080
The last pik shows the color.
Ok. I’m using a brand new diaphragm pump + turbopump, so there should not be any pump oil.
As far as a potential air leak… it’s pulling a deep vacuum 5e-6 torr when I’m not letting deuterium into the chamber so that seems unlikely.
I guess I should take another crack at the RGA to rule out contamination.