[Sneap] He-3

[jim]

  Hi
At Mac we used to mix He4 with the better quality He3 to get the pressure in 
the KN gas bottles to operate the leak. I remember something like a 20% 
mixture of He3 worked well. High purity is not needed.
 Cheers Jim
----- Original Message ----- 
From: "Paul Barker" <p.barker at auckland.ac.nz>
To: "sneap" <sneap at tunl.duke.edu>
Sent: Thursday, May 08, 2008 1:03 AM
Subject: [Sneap] He-3


> The host for the 2008 SNEAP annual meeting is the University of Michigan 
> at Ann Arbor.  The meeting dates are: October: 12 - 17, 2008.
> The meeting web link is: 
> http://www-ners.engin.umich.edu/research/Mibl/Sneap/2008.htm
>
> Sneapers,
> I need a He-3 beam, and so need some He-3 gas to use in the ion
> source. A quote from Chemgas (around 3500Euro for 20
> atmosphere-litres) was more than I could afford. Does anyone have an
> idea about a cheaper provider ? Can one obtain it "secondhand", i.e.
> essentially lying around, unused ? I have had some success buying NIM
> and Camac electronic modules from a secondary supplier, so maybe it's
> possible
> Thanks,
> Paul Barker
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