[dsg-hallb_rich] [EXTERNAL] Re: Verify RICH gas systems set up and dimensions

Fri Feb 25 07:42:26 EST 2022

Hi Tyler and Marco,
about cooling ,attached the details of the terminals adobted for the 
1/2" inox tube.
They were buyed on Mac Master Carr.

Best regards,
Dario

Il 2022-02-25 12:00 Marco Mirazita ha scritto:
> Hi Tyler,
> I discussed with Dario and Sandro your questions, I try to answer here.
> Anyhow, for rich-2 we wand to do the same we did for rich-1, unless
> there are specific reasons to change something.
> The rich-1 system in the clean room was designed by George and perhaps
> you can cross check with him my answers. And in case of doubts, I
> suggest to go in the Hall B to have a direct look at the real things,
> they might be different from the original drawings.
> 
> - Nitrogen
> We have one 1/2" OD tube from main supply, split in two 1/2" OD
> connect to the two inlets manifolds, one per side.
> There is one manyfold left from rich-1 in the cabinet.
> Each manyfold has 6 connectors 1/4" OD for the internal distribution.
> The 6 tubes are routed inside the rich and fixed with 3D printed parts
> that are in the clean room. I attached a picture.
> The total length of the internal pipes should be around 20 m per side.
> The detector has 2 outlet, one per side. But, as long as we can
> remember, in the Hall we closed the lower outlet and only the upper
> one was connected to the bubbler.
> There should be one outlet connector left from rich-1 in the cabinet
> in the clean room. The diameter of the outlet connector looks larger
> than the pipes we remember connected to the bubbler, so there should
> be some adapter somewhere between the outlet and the bubbler. You can
> check this point with George.
> The bubbler was made by two bottles, one after the other.
> 
> Please be sure that all the nitrogen tubes connected to the detector 
> are black.
> 
> 
> - Cooling
> If you remember, the last part of the air distribution was modified
> together with you guys because we couldn't get approval of what we
> originally designed.
> So, please contact George for more details.
> We can confirm the dimensions of the steel tube you attached. The end
> part was threaded to screw some steel cap to close tube. On the other
> side, there was a connector to a 1/2" OD plastic tube.
> The size and position of the holes to distribute the air in the panel
> is one of the things we would like to optimize and we planned some
> test as soon as the whole system will be ready.
> The air cooling panel distributor should have 2 independent lines
> connected to the two sides of the EP.
> For the water drain in the EEL, having a system that brings the water
> outside the EEL would be definitely better, but I can't remember why
> we didn't do it for rich-1.
> 
> Best regards,
> Marco
> 
> 
> 
> 
> Il 2022-02-21 15:45 Tyler Lemon ha scritto:
>> Hello,
>> 
>>  From meetings, it sounds like we'll plan to repeat the nitrogen and
>> air-cooling distribution set up for RICH-II that was used for RICH-I.
>> Before we proceed with buying things, can someone review set up below,
>> specifically the highlighted items and questions?
>> 
>>  _Nitrogen (N2) supply set up:_
>> 
>>  	* One 1/2" outer diameter (OD) nylon tube for main N2 supply
>> 	* Main N2 supply line branches off into two 1/2" OD lines at detector
>> 	* Two lines enter RICH N2 volume, one at the right cable raceway, the
>> other at the left cable raceway
>> 
>> 	* Immediately inside the N2 volume on both sides, there is a small
>> store-brought manifold that splits the 1/2" OD line into ???? 1/4" OD
>> lines of equal length
>> 	* The ???? 1/4" OD lines are routed down the front panel of the RICH
>> to blow N2 across aerogel tiles
>> 
>> 	* 1/4" OD lines are held in place by a specially designed bracket
>> 
>> 	* One bubbler is attached to detector shell through a connector at
>> one of the cable raceways for N2 exhaust
>> 
>>  _N2 supply questions:_
>> 
>>  	* How many 1/4" OD tubes do we want for final, internal,
>> distribution?
>> 
>>  	* I seem to remember six from the previous RICH, is this correct?
>> 
>>  	* For the manifold that splits the 1/2" OD line into the 1/4" OD
>> lines, do we have any on hand or left over from RICH-1?
>> 
>> 	* Is there a specific part that should hold the 1/4" OD lines inside
>> the detector? Or adhesive cable mounts and zip ties sufficient?
>> 
>> 	* Should the bubbler connect to only one cable raceway exhaust point?
>> Or should the exhaust mirror the input with exhaust points being on
>> both cable raceways and then tied to a T connection and then the
>> bubbler.
>> 
>>  _Air-cooling supply set up:_
>> 
>>  	* Two ???? OD nylon supply tubes from air-cooling panel to detector
>> with disconnect at detector
>> 	* One supply line goes to right cable way on detector shell, second
>> supply line goes to left cable way on detector shell
>> 	* On each side ???? OD supply line continues down cable way to
>> electronic panel (EP)
>> 	* In EP, the nylon supply lines connect to a stainless steel pipe
>> manifold that directs airflow over electronics
>> 
>> _Air-cooling supply questions:_
>> 
>>  	* In RICH-1, we used 1/2" OD nylon tubing for main supply lines from
>> panel to detector. What size will be used for RICH-II?
>> 	* Do we want some sort of disconnect at the detector to make it
>> easier during to move to Hall B?
>> 	* Should same dimensions from RICH-I air-cooling manifold in EP be
>> used for RICH-II? Dimensional drawing from RICH-I is attached.
>> 
>> _General questions:_
>> 
>>  	* I know Hall B Engineering is taking care of any changes to the
>> air-cooling panel and N2 panel to accommodate RICH-II. Does this
>> include taking care of providing the piping from distribution panels
>> to RICH (item 1 in both N2 supply set up and air-cooling supply set up
>> sections)?
>> 	* Is there any plan for air-cooling compressor's water drain in the
>> EEL?
>> 
>>  	* Refresher on drain: the compressor's drain is a forceful ejection
>> of water that happens every few minutes while the compressor is
>> running.
>> 	* Last time we used a 5-gallon water jug with a tube connected to the
>> compressor that had to be emptied every morning
>> 
>> 	* Would there be a way we can get a "permanent" drain installed, as
>> in something where we don't have to empty a container every day, like
>> a drain line running outside or to an existing floor drain in the EEL?
>> 
>> -Tyler
>> _______________________________________________
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>> dsg-hallb_rich at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rich
> 
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