Jed,
Can you point us to a schematic of the vacuum/deuterium supply plus exhaust to the RGA/mass spec. From the photo, it appears that there is only a single gas/vacuum outlet on the conflat cylinder.
I assume the unit gets pumped down before bakeout from the single line. It is then baked out under vacuum several times until there is no water in the RGA/mass spec (which is output from the turbopump).
The question I am having is how does Mizuno keep the unit in a D2 atmosphere at relatively stable partial vacuums, i.e. 2 Pa, or 300 Pa or whatever. I have natural concern about air being drawn into the conflat under vacuum and then catalytically supporting combustion of the D2 on the hot metal surfaces. It is my hope that the schematic can rule that out, or instead monitoring output from the RGA/mass spec showing only very small amounts of H2O or D2O in the output.
If the D2 and the turbo pump are controlled by valves, how are they regulated, i.e. automatically or by hand? Alternatively, is the unit pumped down, then loaded with D2 for the time necessary to achieve optimal D2 loading in the mesh, and then the valve sealed off while the pressure gauge monitors the slow yet steady rise as there is microleakage through the seals or outgassing.
Note: a relatively simple way to measure the amount of microleakage is to pump the unit down to highest vacuum under operating temperature, close off all valves, and then measure the rate of rise of the vacuum over the fixed volume in the conflat cylinder. It can then be readily established that the quantity of O2/air and the D2O that could have possibly entered the conflat is limited to that which would cause the pressure to rise. Once the leakage rate is established, one can put an upper bound on the maximum heat from chemical reaction between O2 and D2 in the unit, thereby ruling that out in the results.
It would also be helpful if the unit is under continuous D2 supply if a rate of D2 added per unit time (i.e. mol/s) can be computed from the instrumentation so again to rule out chemical heat from the supply.
Thank you (and thank you for translating Mizuno's work to us over the years). Good work Jed -- you are a benefit to the LENR scientific community.