[Sneap] Tandem Terminal TMPs

[Pertti O. Tikkanen]

Hello Natko,

We have a Leybold Turbovac 151 with a DN100 CF flange at the terminal  
of our 5-MV tandem. As we use N2 + CO2 -mixture at up to 16 bar, we  
epoxy-molded the power connector feedthrough and made an extra  
weldment on the inlet flange.
We also made a bit thicker bottom plate.
To be sure that the modified pump will stand the high pressure, we  
finally made a pressure test with immersing the whole setup in water  
and pumped-up to 21 bar with hydraulic test pump. No leaks, no  
pressure drop within 15 to 30 min, which time is usually considered  
long enough.
We have run the pump for several thousands hours. It runs at about 400  
Hz by a modified car alternator.

Best regards,

Pertti


-- 
Dr. Pertti O. Tikkanen
Senior Laboratory Manager

Department of Physics                OFFICE:  +358-9-191 50006
Division of Materials Physics        FAX:     +358-9-191 50042
P.O. Box 43 (Pietari Kalmin katu 2)  MOBILE:  +358-9-726 5386
FIN-00014 University of Helsinki
FINLAND

Quoting "Natko Skukan" <Natko.Skukan at irb.hr>:

>
>
>
>
> Dear Sneapers,
> We are considering options for a TMP installation in the terminal of
> our EN. The question is what types of TMPs are installed around the
> world, in other words, what types are proven to sustain 16 bar
> pressure? A few types I know  (Leybold Turbovac 150 & 360) are
> probably obsolete by now. I can't find ATS100 by Alcatel on their
> website as well. Especially interesting would be drag TMPs for better
> pressure difference. A comment on controller/frequency converter (home
> made, original, or special design) would be also appreciated.
> Regards,
> Natko
> --
> Natko Skukan
> Laboratory for Ion Beam Interactions
> Rudjer Boskovic Institute
> Zagreb, Croatia
> nskukan at irb.hr
> http://www.irb.hr/en/str/zef/z3labs/liis/
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>