Re: cable order

["C. Cuevas" <cuevas@jlab.org>]

Hi,

I have been following the discussions so far, and the analysis of the 
optimum choice sounds very reasonable to me for the FDC application. 

At one point I had considered using the same type of cable[0.025" 
pitch], but with 34 conductors for the CLAS12 drift chamber 
application.  Given the present cable space allocation with the CLAS12 
drift chamber on board electronics, we have decided to use a 'standard' 
34 conductor 'round-twist-n-flat' cable for the prototype chamber.  The 
center to center length [ measured between flat sections] has been 
optimized for the CLAS12-Region 1 chambers also, so it is not a 
duplicated effort.

I like the idea of having a color coded outer jacket, and if it does not 
cost extra, I think it would be a nice feature especially since there 
will be miles of other cabling that will emit from the detector/rack 
area once installation begins. 

I tried sending a powerpoint drawing of the FlashADC-250 rack, complete 
with details of cabling issues to populate the front of a crate with 256 
RG-58 cables.  The file was blocked by the server, so I will post it to 
the portal today.

Best regards,
Chris
x5053
~~~~~~~~~~~~~~~~~

Joe Beaufait wrote:
> It seems that we have both been talking to Mike about the cable 
> purchase but, you may have missed some emails while you were out of 
> town. The consensus is that we will strip the outer jacket and shield 
> from the standard pvc cable over the last 2 meters and then heat 
> shrink over the foil shield for that distance. This gives us the 
> minimum possible mass in the bore while maintaining the maximum 
> shielding and durability  over the rest of the length.  I was  in 
> process for ordering  but, I will default  to you if you desire.  We 
> shouldn't duplicate effort.
>
> Thanks
> Joe
>