dewar connector light leak

[roger smith x294]

Reply to Paul Jorden, RGO

Paul,

Thanks for pointing out the light leak through the amphenol hermetic connector.
We are presently using Bendix PT02H-20-41P 41 pin hermetic connectors.
As soon as I read your message a focused a bright light (from a fiber optic
illuminator) on the green glassy substrate of the connector and - guess what
- it is quite translucent.  Though there is an O-ring seal to the mating
connector it is very plausible that a leak by this path could invalidate
our results when comaparing dark current from various windows.
I will measure the ease of ingress of light via this path and
take steps to attenuate it.  I find this kind of discussion on the net
very helpful...

Roger Smith, CTIO