Re: updated geometry

[Matthew Shepherd <mashephe@indiana.edu>]

Hi Richard and Beni,

It would be nice to get these fixed ASAP since Blake and I working  
right now on resolution and reconstruction studies using the BCAL.   
Can the change be made and checked in?

Thanks,

Matt


On Jul 14, 2008, at 10:35 AM, Richard Jones wrote:

> Beni, some work is still needed on this geometry.  The following  
> items are invalid, so that no particle will ever be able to enter  
> their volumes.  This is not a comprehensive list, just the result of  
> a quick spot check I did.  I have a tool that can enables a quick  
> point-and-click check on individual volumes.  I can show you how to  
> use it, if you are interested.
> 	• FDC cables re-routed to run upstream
> 	• 8mm aluminum plate in front of BCAL
> That aluminum 8mm plate will completely wipe out the BCal  
> resolution, once it is in there!  For the moment, however, it causes  
> no problems at all, because particles do not see it. :-)
>
> -Richard Jones
>
>
> Beni Zihlmann wrote:
>>
>> Dear colleagues,
>> I updated the geometry in the repository. The geometry now reflects
>> all the changes and design decisions that have been made lately.
>> 1) remove outer most CDC layer thereby reducing the CDC radius by  
>> 1.6 cm
>>    including the cable runs.
>> 2) re-route the FDC cables to run upstream
>> 3) add an 8mm aluminum plate on the inside of the BCAL
>> 4) the BCAL readout segmentation is 4x6 (sector x layer)
>>
>> all these changes are now available the in geometry file  
>> hddsGeant3.F located in
>> src/programs/Simulation/HDGeant/
>>
>> cheers,
>> Beni
>>
>