Re: Electrometer insulators (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Mon, 30 Oct 2006 20:09:18 -0500
From: Richard Hull <rhull@xxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Electrometer insulators (fwd)

Sapphire is the normal super insulator of choice in high end electrometer
work.  Polystyrene and teflon are about an equal #2.

Richard Hull

----- Original Message ----- 
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxx>
Sent: Monday, October 30, 2006 4:20 PM
Subject: Electrometer insulators (fwd)


> Original poster: Steven Roys <sroys@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 30 Oct 2006 9:11:32 -0800
> From: David Dameron <ddameron@xxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Electrometer insulators
>
>
> Does anyone know of a web page with characteristics of insulators suitable
> for electrometer work? I am investigating an experiment with a metal box
which
> would hold gel-cell batteries, a motor, rotating magnets, etc. The charge
which
> could be induced on the box is in the range of
>
> 10E-14 Coulomb. This metal box would be enclosed in and insulated from an
> Faraday cage.
>
> One candidate is polystyrene, say 4 columns 10cm long. I know teflon is
> good for small printed-circuit use, but do not know how it would perform
in this
> type of use. The insulator should not be too much piezoelectric, with
> likely vibrations from the rotating elements.
>
> -Dave D.
>
>