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

[Marco Mirazita]

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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