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Hi:
   I would like to second these modifications. We need to have forward
tracking implemented and the cryostat also. Having the correct
segementation for the S EM calorimeter is also important.
                                                          Uriel

Uriel Nauenberg
Prof. of Physics
Campus Box 390, Physics Dept.,
University of Colorado,
Boulder, CO 80309-390
[log in to unmask]
Phone # (303) 492-7715
FAX   # (303) 492-5119

On Fri, 21 May 1999, Jim Brau wrote:

> Dear Colleagues,
> 
> I have tried to compile a complete list of the "fixes"
> that we have been identifying for August.  That list follows.
> Bruce has helped me with this list.
> These are mostly "corrections" to the S1 and L1 configurations.
> I realize that in August we may want to actually change the
> configurations, such as increasing the tracking volume for Model S,
> or going to a completely different layout in some way.
> That would be outside the "spirit" of this list.
> Please comment on the list, suggest missing items, etc.
> 
>     Jim 
> 
> 
> 
> _______________________
> James E. Brau
> Physics Department 
> University of Oregon
> Eugene, OR 97403-1274
> (541) 346-4766
> 
> 
>  
>    1.  reduce the segmentation of Model S EM to 1 cm x 1 cm
>    2.  reduce the beampipe thickness to 0.5 mm
>    3.  change the CCD layout to Chris' new layout:
>          
>         http://hep.ph.liv.ac.uk/~green/lcfi/techdraw/VXD_col.ps
>         
>    4.  use the same CCD layout for both model S and model L
>    5.  add the VXD cryostat to both detectors
>    6.  add forward tracking to Model L
>    7.  add 1 cm to Rinner for Model S forward tracking (mask clearance)
>  
>       Bruce proposes:
>         
>                z             r_inner (110 mrad + 1 cm)
> 
>              31.2            4.4
> 
>              61.2            7.8
> 
>              91.2           11.1
> 
>             121.2           14.4
> 
>             149.2           17.5
> 
>    8.  increase the inner radius of the TPC.
>    9.  far-forward instrumentation suggested by Steve Magill for QCD tagging
>        and SUSY background rejection.  More specifics required.
>   
>    
>  
> 
>