[Sneap] Turbo pumps and cesium

[Mueller, Kenneth Alan]

According to sneap-bounces at tunl.duke.edu <>
> ++++++++++++++++++++++++++++++++++++
> 
> Leaves the question, whether it would help to run the pump at elevated
> temperatures (kind of baking system) in order to prevent
> condensing. That
> probably boils down to the question, what is cesium's vapour
> pressure at
> reasonable pump temperatures. Does anyone know where to look
> for a  vapour
> pressure/temperature curve under vacuum conditions for cesium?
> 

I looked for this on the web a number of years ago.  Here is what
I found:

TEMP	VAPOR PRESSURE
C	(millitorr)

50	0.01
75	0.09
100	0.47
144	5.7
150	7.7
160	12.5
170	19.8
180	30.7
190	46.8
200	70.0
250	416.5
300	1815.8
350	6250.2

I can't swear to the accuracy of this, but it's probably a
good estimate.

Good luck.


> 
> Klaus
> 
> _______________________________________________
> Sneap mailing list
> Sneap at mail.tunl.duke.edu
> http://mail.tunl.duke.edu/mailman/listinfo/sneap

                                    Ken

-- 

   ----( AMS )---------     Ken Mueller
  |                    \    USNAIL:     Prime Lab
  | P R I M E   L A B  |                Purdue University
  | PURDUE UNIVERSITY  |                525 Northwestern Avenue
  |                   /                 West Lafayette, IN 47907-2036
                            INTERNET:   kam at purdue.edu
PURDUE RARE ISOTOPE         PHONE:      (765) 494-5382
MEASUREMENT LABORATORY      FAX:        (765) 496-7228