[Halld-tracking-hw] [GlueX] Hall D cables

[Yves Van Haarlem]

Hi Fernando,

Here is our feedback on the proposed cabling:

- The HV configuration looks fine

- Signal cables: we think 146 Amphenol cables are not enough, you can 
check with Slava how many HV-boards the CDC needs but we are pretty sure 
it is more than 150 and it is good to have some spares.

- What about cables for pre-amp test signals? As the LV cabling still has 
to come and LV + test signals end in a single connector on the 
HV board, we assume test signals will be done together with the LV.

Cheers,
 	Yves



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                          /   Yves Van Haarlem
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On Sat, 13 Mar 2010, Fernando J. Barbosa wrote:

> Hello everyone,
>
> I have attached a pdf with a list of signal and HV cables for use in Hall D. 
> This list will be later expanded to include the LV and optical fiber cables 
> and it will form the basis of a formal specifications document. The cables 
> listed connect the various detector sub-systems to instrument racks.
>
> The cable lengths, with routing allowances for trays and racks, have been 
> checked with the Hall D mechanical group; the suggested actual length of the 
> cables have been rounded up to allow grouping among different sub-systems and 
> minimize cost and part numbers. The nominal cable rating is NEC UL CL2 and 
> cable part numbers are suggested.
>
> The types of connectors (no actual part numbers at this time) are included 
> for the source and destination (the readout modules use Lemo-style 
> connectors).
>
> Due to accelerated procurement initiatives by the 12GeV management team, I am 
> requesting the following information and feedback, where appropriate, by the 
> end of next week (3/19/2010) from the collaboration and from the various 
> detector subsystems:
>
> 1. Cable type & ratings (with anticipated HV operation levels of PMTs, for 
> example)
> 2. Length
> 3. Connector types (source and destination)
>
> My plan is as follows:
>
> 1. Request info/feedback from collaboration (this)
> 2. Finalize specifications document
> 3. Submit formal specifications document to Dianne (12GeV Integration) for 
> submission to the JLab Electrical Safety Committee and approval
> 4. Outline procurement plan with the JLab procurement dept.
> 5. Procure cable assemblies from vendors.
>
> I note that some detectors are not completely defined for the final 
> configuration in the hall but the number of cables from these detectors is 
> relatively small. I would appreciate if you could provide information as to 
> the procurement readiness for such sub-systems.
>
> Thanks for your prompt feedback in advance.
>
> Best regards,
> Fernando
>