[Dsg-hallc_nps] [EXTERNAL] Re: responses to comments/corrections (NPS)

[Brad Sawatzky]

Hi Aaron, (et al.),

Thanks very much for the clarifications.  It is clear there is some
confusion here and I really appreciate your notes.  I also really
appreciate all the work that has been done by the DSG -- this is 
a huge job.

-----------------------------------------------
Plans/Goals:
-----------------------------------------------
The longstanding goal for NPS has been to have every system (detector,
DAQ, cooling/chiller, slow-control readbacks, LED ssytem, etc) tested
in EEL/108 before the system goes to the Hall.

The ultimate (practical) deadline for a fully-implemented system in
EEL/108 is January.  That gives us time to debug/troubleshoot before
breaking the system down and beginning installation into the Hall in
spring 2023.

The expectation is for the French group to return to JLab towards the
end of November or early-Dec to complete installation of PMTs and
support any other cabling/internal wiring work needed.  This could
include internal connections to the humidity sensors.  The humidity
sensors did get installed when they were on-site last month.

The intent is that when they are done, we should have a mechanically/
electrically complete NPS detector system.  (To my knowledge the exact
travel dates for the group are still TBD though.)


-----------------------------------------------
Cabling support (not DSG):
-----------------------------------------------
Physically cabling things up is definitely not the responsibility of the
DSG :-)  When I was talking about 'hook-up' support, it was in the
context of advice and troubleshooting.  I think we're on the same page
there.


-----------------------------------------------
LED/VLD support:
-----------------------------------------------
I definitely agree that the as-is drivers for the VLD boards were not
were I had understood them to be back in the summer.  My understanding
from some conversations/emails in August was that you folks were in
touch with Bryan Moffit and William Gu to get the drivers where you
needed them to be.  There were a flurry of emails between Brian E.,
William, and Bryan M. in late August surrounding some VLD firmware
updates and prototype drivers.  The last note that I have was a reply to
Brian Eng on  8/23 confirming use of some hardware and a summary of LED
controls that needed to be exposed to the user.  I guess I assumed that
work was ongoing -- has it stalled out?
- Do we need a separate meeting with the FE/DAQ group on this?


-----------------------------------------------
Chiller:
-----------------------------------------------
I had forgotten to mention the chiller controls in my earlier email.
I'm glad to hear it is basically ready to go.


-----------------------------------------------
Humidity sensor 5V supply:
-----------------------------------------------
The 5V supplies for the humidity sensors will certainly go in the
rack near the MPOD Low-voltage supply.  The new power supply cable (4
twisted-pairs) that we discussed can follow the same path from rack.


-----------------------------------------------
cRIO question:
-----------------------------------------------
I am a little unclear on the cRIO form-factor, where it will need to be
installed (power, network, cabling requirements, etc.)  I'm sure there
are no issues, but I'd feel better if we could move that equipment into
EEL/108 and get it on the Hall C network sometime soon.
- Perhaps we can meet later this week and find a location for the
  cRIO gear and 5V supply in our EEL/108 racks?


-----------------------------------------------
PV Alarms for chiller/HV/LV/humidity/temp etc:
-----------------------------------------------
Thanks for the update on the PV alarms.  I knew BEAST was deprecated,
but I wasn't sure what the current plan was for that.

All the best,
-=- Brad

On Thu, 03 Nov 2022, Aaron Brown wrote:

> Hi Brad,
>
> Attached please find a word document addressing your comment and
> corrections.
>
> Have a great evening!
>
> Best,
> Aaron



-- 
Brad Sawatzky (he/him), PhD <brads at jlab.org> -<>- Jefferson Lab/SciComp/F272
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