[Dsg-rtpc] [EXTERNAL] Re: RTPC Cable Length

Tue Nov 5 09:53:03 EST 2019

For reference, the gas tubing epoxied to the detector front plate are all
at least 20 cm long and have push-pull connectors.   The RTD temperature
probes mounted in the detector have about 40cm of cable length.   I can
send exact lengths and pictures later today.

-Eric

On Tue, Nov 5, 2019 at 9:46 AM Sebastian Kuhn <kuhn at jlab.org> wrote:

> Dear all,
>
> the cables in question are for the temperature sensors that are installed
> on the front face of the RTPC, just like the gas tubing. Hence, the total
> length from the detector to the gas panel will have to be similar to that
> for the TOTAL length of gas tubing. As Bob pointed out, this actually is
> made of 2 parts - from the detector to an interconnect at the SVT mount,
> and from there to the gas panel. I hope that either Bob or Cyril can
> provide us for the actual lengths of BOTH parts, which we will have to add
> together for the total length of cabling needed to the gas panel. I suspect
> it will be a bit more than 15’, because of the “obstacles” that Carlos
> mentioned. We can then have one interconnect on the gas panel and then have
> the 2nd set of cables from there to the electronics, which Bob already has
> the length of.
>
> - Sebastian
>
> On Nov 5, 2019, at 8:52 AM, Bob Miller <rmiller at jlab.org> wrote:
>
> The gas tubing length discussed below is from the gas panel to the SVT
> mount, where the gas lines will have a bulkhead fitting.  There will be
> separate gas lines from the bulkhead fitting to the detector.
>
> I don't know where your detector cables are starting, or ending.
> Therefore, I don't know if basing their lengths off of the gas line lengths
> is appropriate.
>
> Bob
>
>
> On 11/4/2019 9:06 PM, Carlos Ayerbe Gayoso wrote:
>
> NOW we have some numbers!!
>
> Thank you Jiwan!!
> ------------------------------
> *From:* JIWAN POUDEL <jpoud001 at odu.edu> <jpoud001 at odu.edu>
> *Sent:* Monday, November 4, 2019 9:03 PM
> *To:* Carlos Ayerbe Gayoso <gayoso at jlab.org> <gayoso at jlab.org>
> *Cc:* Brian Eng <beng at jlab.org> <beng at jlab.org>; Sebastian Kuhn
> <kuhn at jlab.org> <kuhn at jlab.org>; Bob Miller <rmiller at jlab.org>
> <rmiller at jlab.org>; Nathan Baltzell <baltzell at jlab.org>
> <baltzell at jlab.org>; Eric Christy <christy at jlab.org> <christy at jlab.org>;
> Bill Crahen <wcrahen at jlab.org> <wcrahen at jlab.org>; dsg-rtpc at jlab.org
> <dsg-rtpc at jlab.org> <dsg-rtpc at jlab.org>
> *Subject:* [EXTERNAL] Re: [Dsg-rtpc] RTPC Cable Length
>
> Hello Carlos,
>
> During the test of new gas panel, Bill Crahen sent this about the length
> of the tubing:
>
> "I just talked to Cyril, and he shows a straight line distance of about
> 11', so figure perhaps 15' actual length, and shorten your supply line to
> match.”
>
> So Bill and Bob made the tubing of gas panel at EEL accordingly. I have
> also cc’ed Bill Crahen, so he might answer it correctly if anything
> changed!!
>
> Thank you,
> Jiwan
>
> On Nov 4, 2019, at 8:20 PM, Carlos Ayerbe Gayoso <gayoso at jlab.org> wrote:
>
> allow me to rephrase Brian,
>
> the requested length of the cables SHOULD be (approximately) the same as
> the length of the gas tubing between the detector and the panel. Since that
> distance is not the shortest one due to all the obstacles and provisions
> between those elements (panel and detector), both (cable and tubing) will
> share the same path and will be quite longer than the evident path.
>
> I think that length is already (more or less) well determined, but unknown
> for many, including me.
>
> Cheers
>
> -Carlos
> ------------------------------
> *From:* Dsg-rtpc <dsg-rtpc-bounces at jlab.org> on behalf of Brian Eng <
> beng at jlab.org>
> *Sent:* Monday, November 4, 2019 7:44 PM
> *To:* Sebastian Kuhn <kuhn at jlab.org>
> *Cc:* dsg-rtpc at jlab.org <dsg-rtpc at jlab.org>; Bob Miller <rmiller at jlab.org>;
> Nathan Baltzell <baltzell at jlab.org>; Eric Christy <christy at jlab.org>
> *Subject:* Re: [Dsg-rtpc] RTPC Cable Length
>
> Bob has already provided the length between the electronics and the gas
> panel, so that part is established.
>
> As for the connectors I only ordered enough for 1 level of disconnect.
>
> What we don't have yet is the length from the panel to the detector.
>
> ________________________________________
> From: Sebastian Kuhn <kuhn at jlab.org>
> Sent: Monday, November 4, 2019 7:20 PM
> To: Brian Eng
> Cc: dsg-rtpc at jlab.org; Nathan Baltzell; Narbe Kalantarians; Bob Miller;
> Eric Christy; Hattawy, Mohammad
> Subject: Re: RTPC Cable Length
>
> Dear Brian,
>
> we briefly discussed this issue at today’s BONuS12 engineering meeting.
> Basically, there are several possible intermediate steps to consider: The
> cables that are fixed to the probes should have connectors for easy
> installation together with the RTPC. The second step would be from those
> connectors to the gas panel. Finally, my understanding is that the crate
> containing the electronics for the gas system controllers will be some
> distance away (but on the same space frame level), on the North Side.
> (Nathan, please correct me if I’m wrong). I don’t know what that distance
> is, but maybe some of the other people cc’d on this email can answer.
>
> Greetings - Sebastian
>
> On Nov 4, 2019, at 9:55 AM, Brian Eng <beng at jlab.org<mailto:beng at jlab.org
> <beng at jlab.org>>> wrote:
>
> Hi Sebastian,
>
> Do you have this information? If you have the length between the gas panel
> and the detector I can just add that to the length Bob is providing.
>
> Who is fabricating the RTD cable? I'd assume we (DSG) are, but best to
> make sure before we order anything.
>
> Thanks
> --
> Brian Eng
> Detector Support Group
> 757-269-6018
>
> Begin forwarded message:
>
> From: Bob Miller <rmiller at jlab.org<mailto:rmiller at jlab.org
> <rmiller at jlab.org>>>
> Subject: Re: RTPC Cable Length
> Date: November 4, 2019 at 7:14:43 AM EST
> To: Brian Eng <beng at jlab.org<mailto:beng at jlab.org <beng at jlab.org>>>
>
> Hi Brian,
>
> I can get you a cable length for the gas panel tomorrow.
>
> Please contact Sebastian Kuhn about detector cables.  He was in the Hall
> last week and came up with a plan, I don't know if he considered RTDs.
>
> Thanks,
>
> Bob
>
> On 11/1/2019 6:02 PM, Brian Eng wrote:
> Hi Bob,
>
> Is there a distance for the cables calculated yet?
>
> We need one for the cables between the cRIO (on SFL1N that we moved to)
> and the gas panel and also one for the cRIO to the detector itself (for
> RTDs).
>
> Thanks
>
> --
> Bob Miller
> Hall B Lead Engineer
> Jefferson Lab
> 757 822-9586
>
>
>
>
>
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>
> --
> Bob Miller
> Hall B Lead Engineer
> Jefferson Lab
> 757 822-9586
>
>
>
>
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