[time-nuts] temperature stability basics

[Alan Melia]

I believe there is a reflective/foam insulator that is sold for setting
behind (what we in UK call ) CH radiators when the are mounted on outer
walls. That would meed Poul-Henning's temperature difference criteria, I
think. Interesting topic may me revise some 50 year old very rusty physics
:-))

Alan G3NYK

----- Original Message ----- 
From: "jimlux" <jimlux at earthlink.net>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Friday, November 26, 2010 11:41 PM
Subject: Re: [time-nuts] temperature stability basics


> Hal Murray wrote:
> > namichie at gmail.com said:
> >> Find some closed cell polyethylene that is quite thin and some very
light
> >> aluminium foil and you could make many layers.
> >
> > How about aluminized Mylar?
> >
> > If the many-reflective-layers idea really works, I'd expect somebody to
sell
> > foam built that way.  Why don't they?
> >
> Maybe demand is small for such a product?
>
> They do make thin metal/fabric multi layer stuff (for things like
> exhaust systems) where the fabric is something moderately refractory
> (fiberglass? ceramic wool?)
>
> And, for spacecraft (a very small volume application) look up
> "multilayer insulation" or MLI.
>
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