[Dsg-rich] Interlock sensors

[Marco Contalbrigo]

Hi Tyler,
in the previous mail I listed the tentative customized lengths for
each cable of the inner N2 volume. I will verify these with
Dario and Sandro as soon as possible.
Thanks, Marco.


On Fri, 13 Oct 2017, Tyler Lemon wrote:

> Hello Marco,
> 
> Thank you for sending the interlock cable information.
> 
> For the feedthroughs for the new cable bundles mentioned today for the nitrogen body, we have already submitted the PR.
> 
> However, we will need more:
> 1.) four-wire RTD cable and three-wire humidity sensor cable - Once ordered, it will take about one week to be delivered at JLab.
> 2.) temperature and humidity sensors. - We should have enough humidity and temperature sensors. However, we will need to verify the amounts we have
> on hand.
> 3.) PCBs to mount sensors. - If we cannot easily order or find more PCBs to mount the sensors, we can find alternative boards to epoxy the sensors
> too.
> 
> You mentioned the cable lengths from relevant locations to the 15-pin feedthrough could be customized. Could you send us these cable lengths so
> Mindy can begin to fabricate the cables as soon as we receive the components?
> 
> Best regards,
> Tyler
> 
> 
> 
> ____________________________________________________________________________________________________________________________________________________
> From: "Marco Contalbrigo" <mcontalb at fe.infn.it>
> To: "Tyler Lemon" <tlemon at jlab.org>
> Cc: "dsg-rich" <dsg-rich at jlab.org>
> Sent: Friday, October 13, 2017 11:07:16 AM
> Subject: Interlock sensors
> 
> Dear Tyler,
> as anticipated at the meeting, here is the list of
> sensors we have in mind.
> 
> Each PCB station mounts 2 temperature (T) and 2
> humidity (H) sensors. I would suggest we cable
> all of them but connect only one H+T pair per
> station to the cRio, while keeping the second
> as spare. Should a sensor have a problem, we
> would need an access to exchange it with his
> spare at the cRio.
> 
> One option could be to have 4 cables in the
> short (internal RICH) section and only 2 in the
> outer (Hall) section. This implies however to
> access the connectors at the RICH position to
> be able to exchange the sensors.
> 
> -----------------
> Electronic Panel (EPanel)
> -----------------
> Short section: from EPanel to patch panels
> Lenght as the average of the power supply
> cables: 6 m.
> 
> Long section: from patch panel to cRio
> patch panel A: 50 feet
> patch panel B: 65 feet
> 
> Priority is cooling monitor, electronic healty
> and FTOF heat load control. The mimimum would
> be 6:
> 
> 1 for inlet
> 1 for outlet
> 2 on the electronics
> 1 outside the cover
> 1 on the FTOF
> 
> It is clear to have at leat 2 more (for a total
> of 8) would be worth, to have a better control
> of possible hot spots.
> 
> -------------------
> N2 volume
> -------------------
> Short section: internal to the N2 volume, from
> relevant locations to the 15-pin feedthrough
> Lengths can be customized (see below).
> 
> Long section: from feed-through to the cRio.
> Lenghts as for the patch panels.
> 
> We do not need to pass by the patch panels.
> Priority is to monitor the inner volume and
> control the aerogel. The minimum would be 6:
> 
> 2 for inlet (3.5 m)
> 2 on the aerogel (4 m)
> 1 for outlet (1 m)
> 1 close to the EPanel (5 m)
> 
> Again, to have 2 more could be wise.
> 
> All together, the number would be 6+6=12 stations
> (one sensor per type connected) as minimum, with
> 8+8=16 as optimum, given the cRIO capability.
> 
> On top of all, we should not forget to calibrate
> the sensors before installation.
> 
> As anticipated, Luca Barion from INFN-FE is
> supposed to stay at JLab in one week from now.
> He could join the effort of sensor cabling
> and calibration if this helps.
> 
> Thanks, Marco.
> 
> 
>