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

[Fernando J. Barbosa]

Hi Yves,

Yves Van Haarlem wrote:
> Hi Fernando,
>
> Here is our feedback on the proposed cabling:
>
> - The HV configuration looks fine
>
OK.
> - 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.
You may be right because some of the cards do not have any straws and 
this has changed a bit. I will get the final number from Slava.
>
> - 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.
The Amphenol cable has 25 pairs and one pair is used for the test signal 
which is generated on the fADC125.

Thanks for the feedback.

Best regards,
Fernando




>
> Cheers,
>     Yves
>
>
>
>                           /--------------------------------
>                          /   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
>>
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