Re: Lead glass blocks

[Matthew Shepherd <mashephe@indiana.edu>]

Hi Tim,

No we don't need any special cooling.  We do want to maintain  
temperature stability as much as possible though to reduce gain  
variation of the PMTs although we have done some testing and didn't  
find any significant temperature dependence.  (see GlueX-doc-657)

-Matt

On Jan 24, 2008, at 7:55 AM, Tim Whitlatch wrote:

> Hi Matt,
>
> I spoke with Dave Kashy about the Hall B primex lead glass  
> calorimeter. They used lead-tungsten glass and it had to be cooled  
> in order to perform properly. Do we require any cooling for ours  
> taking into consideration the type of material we will use for the  
> rad hard inner layers?
>
> Thanks,
>
>       Tim
>
>