[Sneap] UHV microdot connectors

[Van Deusen, Stuart B]

Hello Ian
 
For bakable UHV applications we've only used alumina bead insulated
cables made by ISI (but I think Ceramaseal makes them as well).  I've
attached a picture of one.  In our application the detector end has a
Microdot connector, the other end a "type-A" connector.  The "type-A"
connector attaches to the feedthrough, which has a BNC on the outside.
These cables consist only of the center conductor, the alumina beads,
and the stainless steel braid shield.  They are kind of pricey ($500 USD
six years ago for the one in the picture) but they work really well.
They may be able to put on an SMA connector instead of the "type-A."
 
Good luck and happy holidays.
 
Best regards,
Stuart Van Deusen
 
----------------------------------------------------------- 
Stuart B. Van Deusen 
Radiation Solid Interactions and Processing 
Dept. 1111, M/S 1056 
Sandia National Laboratories 
P.O. Box 5800 
Albuquerque, NM  87185-1056 
PH (505)844-7782 
FAX (505)844-7775 
e-mail:  sbvande at sandia.gov 

 

 
________________________________

From: sneap-bounces at tunl.duke.edu [mailto:sneap-bounces at tunl.duke.edu]
On Behalf Of Ian Vickridge
Sent: Tuesday, December 18, 2007 8:37 AM
To: Sneap at Daytona. Tunl. Duke. Edu
Subject: [Sneap] UHV microdot connectors


Hi there,
 
I have a couple of bakeable detectors in a UHV (10e-11 mbar) chamber. I
need to connect them to the outside world via 50ohm SMA feedthroughs.
The detctors are fitted with 'microdot' connectors for which the part
number from Tyco was given some time ago on SNEAP. 
 
However I need to be sure that my 'microdot to SMA' UHV cable is
bakeable - so I wonder if anyone has experience using the Tyco or indeed
any other compatible microdot connectors with Kapton coaxial cable in
ultra-high vacuum?
 
Thanks for your collected wisdom
 
IV
 
Ian Vickridge
Institut des NanoSciences de Paris
SAFIR, sous-sol 24-23, UPMC, Campus Jussieu, et
Campus Boucicaut, 140 rue de Lourmel 75015 Paris
+33 1 44 27 47 10 (phone)
+33 1 44 27 47 11 (fax)
 
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