CCD/Dewar contamination

[Paul.Jorden at eev.com]

Posted to CCD-world:
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Willie,

I read your detective story with interest!

In answer to your queries, I hope perhaps Paddy Oates may add to what I say 
here.  Anyway, basically at RGO things were cleaned, but never by holding 
components in gloves, whilst in solvents.  Can't you manage with an 
ultrasonic solvent bath, and stainless tongs as you suggest later?
Also, we only baked cryostats extensively when trying to get good results 
with Loral/Lesser-thinned CCDs.  Baking will help to get a good vacuum more 
quickly of course. We used heating tape (to less than 100C, I think).

In your case, it seems that extensive cleaning caused the problem- what an 
irony!

Best Regards,
Paul
_______________________________________________________________
Dr Paul Jorden,  CCD Applications, EEV
Waterhouse Lane, Chelmsford, Essex, CM1 2QU, UK
Tel:      44 (0) 1245 -453458 (direct), -493493 (switchboard)
Fax:      44 (0) 1245 453224


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