[d2n-analysis-talk] APS Poster, Version 2

[Brad Sawatzky]

On Tue, 09 Feb 2010, David Flay wrote:

> On Tue, Feb 9, 2010 at 2:39 PM, Brad Sawatzky <brads at jlab.org> wrote:
>
> Thanks -- so, the pumping chamber -- does it then have 3He + small
> amounts of Rb, K? In the poster I noted the double spin exchange, but
> I just want to make sure I understand

That's correct.  Even in the pumping chamber, the gas mix is mostly 3He.
There is a small amount of N2 gas in the mix too (~1%, I think).  As
Zein-Eddine points out, the Rb/K vapour will tend to condense out in the
transfer tube so the gas in the actual target cell is 'purer' 3He than
in the pumping chamber.

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
  Ph: 757-269-5947 -<>- Pager: 757-584-5947 -<>- Fax: 757-269-7848
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov