Hi Beni, 
 
Maybe you can tuck the TC probe in between the plastic base housings
(up against the plastic block) and seal around all the bases to keep
air flow away. 
 
Tim 
 
beni zihlmann wrote:
Hi Tim,
   
here some pictures of the temperature test setup. I hope that gives
   
a better idea what this test is worth (or not).
   
I checked on Elke's concern that the PMTs might not really draw
   
that much power because if there are no signals then the PMT does
   
not have to do any "work" hence less power consumption.
   
I do see signals because there is enough light leakage that the PMT
   
does some "work". However I found out that exactly the PMT/BASE where
   
I put the temperature probe in stopped working at some point. So
   
I put the temperature probe into the hole of a pmt that works for a
   
fast test and also there I see no  obvious temperature change.
   
Also the test with putting a  cover  (garbage bin) over the whole
assembly
   
is not as good a check as I thouth because that shields also the light
   
and the PMTs have much less to do.
   
Any suggestions what I might "improve" to get a kine of "worst case
szenario"
   
are appriciated.
   
   
   
cheers,
   
Beni
   
   
  
  
   
  
   
   
  
  
   
  
   
   
  
  
   
  
 
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