Derek Mitchell wrote:
> Any implications in having a 31 litre fusor chamber as opposed to more common 1 ~ 2 litres?
1. Lots more surface area to hold gases and moisture, not to mention more volume. So it will need a bigger pump, or more time to pump down, and (indirectly) consume more D2.
2. More damage if it implodes from inadequate strength.
Not a problem with [edit] your "ISO 250 by 580mm high full nipple" SS cylinder.
But things like rail car tanks can be downright hazardous when evacuated...
http://www.youtube.com/watch?v=2WJVHtF8GwI
Fusor in a stainless dustbin with a plastic lid
- Rich Feldman
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- Real name: Rich Feldman
- Location: Santa Clara County, CA, USA
Re: Fusor in a stainless dustbin with a plastic lid
All models are wrong; some models are useful. -- George Box
Re: Fusor in a stainless dustbin with a plastic lid
in this case the "Dustbin" is direct from Edwards in Crawley.
My other smaller "dustbin" is a casing from a large 1979 turbopump.
Although in my case quality of materials and construction are not a issue (see note on British rail engineering) your points are generically apposite.
My other smaller "dustbin" is a casing from a large 1979 turbopump.
Although in my case quality of materials and construction are not a issue (see note on British rail engineering) your points are generically apposite.
Re: Fusor in a stainless dustbin with a plastic lid
I think I can do without the water cooling for an initial stage with a little bit of clever but simple construction.
The feedthroughs for this approach are of course all metal . So the challenge is how to make a good enough thermal insulator in metal to protect the acrylic
The idea is to have a SS flange with a stainless thin walled tube extending from about 25 mm vacuum side to 75 mm non-vacuum side where it capped with a solid piece of stainless. The electrode held only at this cap runs concentrically in side the tube in to the vacuuum side. Thus the hot electrode conducts thermally only to the cap and not into to the acrylic and the tube acts a heat shield for radiated heat.
Note the tube would extend into the vacuum side at least the thickness of the acrylic..
The scale of this contruction would work well with silver soldering.
The feedthroughs for this approach are of course all metal . So the challenge is how to make a good enough thermal insulator in metal to protect the acrylic
The idea is to have a SS flange with a stainless thin walled tube extending from about 25 mm vacuum side to 75 mm non-vacuum side where it capped with a solid piece of stainless. The electrode held only at this cap runs concentrically in side the tube in to the vacuuum side. Thus the hot electrode conducts thermally only to the cap and not into to the acrylic and the tube acts a heat shield for radiated heat.
Note the tube would extend into the vacuum side at least the thickness of the acrylic..
The scale of this contruction would work well with silver soldering.