Thanks for the tips Skulemate! Yeah, I think I'm going to add a gap between the top of the copper block. Hopefully this ceramic insulation that Robotech mentionned is machineable. Two o-rings...
As for the radiated heat, I could try coating the inside of the vacuum chamber with that thermal blanket stuff, you know, the kind we find in emergency roadside kits? What do you think?
I'm still waiting for the vacuum gauge, and it's hard for me to figure out any kind of preliminary idea as to what my vacuum pump can do right now (it's built into the chiller, and was originally part of a "dryer"). I'm hoping for 10" Hg under atmospheric, but that may be optimistic.
Wa_Juk: Interesting stuff! (You got PM)
Quote:
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Thermal conductivity at mean temperature of: 300°C 0·12W/m.k
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[edited out: wrong unit!]
Robotech's linked stuff (the 360) has a thermal conductivity of 0.45 "BTU-in. /Hr. ft^2 deg F" (@500 deg F). Let's see if I can convert that... (anyone?)