Re: Notes of Cal working group meeting uploaded.

["Fernando J. Barbosa" <barbosa@jlab.org>]

Hi Matt,

Thanks for checking on this. My preliminary estimates suggest about 2kW 
per BCAL side with the Peltier cells on the SiPMs. Liquid cooling (~room 
temperature) seems to be a very reasonable approach but we may also need 
some better control over humidity in the hall.

Best regards,
Fernando

Matthew Shepherd wrote:
>
> On Apr 3, 2009, at 2:07 PM, Elton Smith wrote:
>
>> #* Matt: Mentioned that CLEO had good success with the following scheme
>> for cooling their drift chamber electronics: Fill space with (dry) 
>> N2. Use
>> polyethelne tubing with cooling liquid (PF200) to cool N2. System was
>> robust and inexpensive.
>
> I looked up the numbers on this -- the total power radiated by CLEO 
> preamps was about 150W.  This seems significantly (about 10x?) less 
> than the numbers I remember for the SiPMs.  So, I'm not sure this type 
> of solution works.
>
> -Matt
>
>
>