I'm working on a SAFIRE analog experiment. Components:
- Large glass bell jar with steel baseplate and gasket. Evacuated with backing pump, and turbomolecular pump as needed.
- There will be a gas tube to feed hydrogen to a hollow anode. Pressure: on the order of 1 atm. The simplest anode will be the gas tube capped by a nickel or nickel alloy flat plate. I will also use hollow sphere anodes.
- The electrode will be surrounded by a cathode.
- Voltage difference: up to 1000 V and 200 mA, or 600V and 4A.
- I hope to heat the anode to ~1000C or higher using trace plasma in the vacuum chamber to exponentially increase hydrogen diffusion through the anode shell. Is this likely to work?
1) What metals should be used for different anodes? Pure nickel for sure, but I also want a nickel alloy. IIRC SAFIRE said to use at least 10% nickel content.
2) I want a "plug and play" type setup for plugging in different anodes. Each hollow anode will be welded to a metal gas tube. How would you suggest I connect this gas tube to the base plate and vacuum/H2 feed system? This is basically a vacuum/gas feed plumbing and connector question and it's the biggest question I have right now.
If I can get this system working and doing something interesting I will graduate to an all-metal chamber with additional instrumentation such as a langmuir probe.