[Dsg-rich] Interlock sensors - internal lengths of last two cables

[Tyler Lemon]

Hello Marco, 

The set of six interlock cables with the lengths you provided to be used in the nitrogen body are almost complete. 

The six almost ready are: 
2 for inlet (3.5 m) 
2 on the aerogel (4 m) 
1 for outlet (1 m) 
1 close to the EPanel (5 m) 

We do not have the internal lengths for the remaining two cables (for a total of 8 cables for the nitrogen body). 

Please let us know these lengths so the cables can be fabricated. 

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. 
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