On Tue, 21 Sep 2004, William Chops Westfield wrote:

> On Sep 21, 2004, at 4:53 PM, Peter L. Peres wrote:
>> 
>> But they claim to have run tests to specifically exclude this
>> possibility in a vacuum chamber and they say they're not ions.
>> 
> Got a specific page with photos and/or measurements of one of the
> lifters operating in vacuum?  I think you have to get pretty hard
> vacuum before you do away with ion effects.  Sputtering, radiometers,
> vacuum depositation, and others are examples of significant ion effects
> in partial vacuums...

I agree fully but the last time I saw that site (months ago) they claimed 
to use a vacuum chamber rented from somewhere to perform such testing. The 
link must be on their site (maybe it did not succeed so they removed it ? 
- just snickering).

Peter
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