[Dsg-hallc_nps] Procurement for cabling materials

[Brad Sawatzky]

Hi Aaron,

For 7030 cards there are 36 independent HV channels, 3 returns, and a
safety-loop interlock.  That is 40 conductors.  A couple extra returns
certainly wouldn't hurt so the 42-conductor cable should work well.

We have no plans to buy 48 channel modules at this time.

The safety-loop will need to be exposed at the NPS end in some fashion.
We should talk about how that might be implemented in a future meeting.

The lead times you mention below should be no problem.  We can arrange
for Tech staff support as needed.

-- Brad

On Wed, 12 Aug 2020, Aaron Brown wrote:

> Hello Brad,
> We are ready to procure the wires to make the 140' multi-conductor cables
> for NPS.
> We would like to know just how many internal conductors will be needed, 42
> or 52?
> We have received a price for the 42-conductor wire (which can be used for
> the 36 channel CAEN modules) of $4.45/ft for 6000 ft. of wire.
> We would need to  get a price for the 52-conductor wire. This would be for
> modules that have 48 channels, if in the future you want to use such
> modules.
> At the moment, I believe that all modules to be used will be the 36 channel
> type so the 42-conductor wire should be sufficient, is this correct?
> There is a lead time of 4 to 5 weeks for the wire.
> In regards to the length of the wire, we are investigating if the
> manufacturer (General Wire) can cut the wire to a specified length.
> If this is possible, we would purchase 34 142' spools.
> If the manufacturer cannot cut the wire to length for us, then we would
> purchase six 1000' spools and Hall C technical staff would need to cut the
> wire to length of 142' (leaving ~2 ft. extra for each wire for cable
> fabrication).
> We already have a quote from CAEN for the 52-pin Radiall connectors (40
> connectors totaling $17,587).
> There is a 12 week lead time for the connectors.
> While waiting for a response from the French engineering team regarding the
> SAMTEC connectors, we are researching alternatives that will work for the
> operating voltage of 1100 V.
> If you have any questions or concerns, please feel free to reach out via the
> mailing list.
> Best regards,
> Aaron Brown

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov