sPHENIX Event Plane Detector discussion

["Feder, Russell" <rfeder AT bnl.gov>]

sEPD team,

I have been a little out of the loop on sEPD organizing the past week or so.  We did receive the sEPD supports from Astro and we are working on installation instructions.  We were short four Delrin spacer blocks but we are having those made at a BNL shop.

Can you let me know that status of

1. The sEPD sectors?  When will the 6X north and 6X south sEPD sectors or petals some to BNL?
2. the sEPD SiPM boxes and supports?  What is the status of theses SiPM boxes? Did we settle how and where to mount the SiPM boxes?

Russ

Russell Feder

C-AD Cryo Group Leader

sPHENIX Chief Mechanical Engineer

https://www.linkedin.com/in/russell-feder-engineer-manager/

Cell: 631-655-2491

Office:631-344-2253

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From: Park, JaeBeom <jpark4 AT bnl.gov>
Sent: Friday, February 24, 2023 5:19 PM
To: Rosi Reed <rosijreed AT lehigh.edu>
Cc: Cacace, Daniel <dcacace AT bnl.gov>; sphenix-sepd-l AT lists.bnl.gov <sphenix-sepd-l AT lists.bnl.gov>; Feder, Russell <rfeder AT bnl.gov>; Mannel, Eric <mannel AT bnl.gov>
Subject: Re: [sphenix-sepd-l] support structure for sEPD SiPM Box

 

Hi all, 

Sorry for jumping in but just to give you more clear information. 

We had a chance later this afternoon to discuss some details for the box and for the cables which two are relevant (cc Eric in particular for this task). 

So the summary is as following — and @Micah you can maybe add a summary as well for the meeting on Monday (we can discuss offline as well if you want)

1. Current suggestion of the SiPM box is “WEST” side. It was originally suggested in the East side but that side became a bit packed because of MVTX stuff. 

2. We have more room in the west side and as seen in the picture, the box fits well in the north side. The box will be attached to the two aluminum bars and those will be attached to the rail in the picture where the cables are inserted. We confirmed with the engineer team (Dan) that we have enough space for that and the current cables do not need to be moved. Also confirmed with John Haggerty. 

3. We could not put the mockup box in the southern side because there was some activity ongoing there while we had all relevant people around. We took a picture afterwards and the space is similar to the north side. 

4. One of the check we want to do is to test with a bundle of signal cables (meritec) to see if the length really fits to this position. The north side seems to be obviously fine while the cables should have to around a bit in the south side. 

—> For this, I talked with Eric and will arrange next Monday to find a time to test - label - bundle the meritec cables in highbay next week. 

—> Perhaps then we can test with the bundled four cables to see if the length is good enough or not. 

Best,

JaeBeom

2023. 2. 24. 오후 4:55, Rosi Reed <rosijreed AT lehigh.edu> 작성:

Hi Dan and Russ (sEPD team in cc),

Micah and Jaebeom have taken some nice photos of our mock-up sEPD box in the proposed location, see: https://indico.bnl.gov/event/18317/contributions/73680/attachments/46200/78145/SiPM%20Box%20Model.pdf  (if the link stops working, they'll be posted at - https://indico.bnl.gov/event/18317/ we are still working on our draft).

The frame that they mocked up was designed for the other location, I suspect just from the photos that some design changes will be needed.  Please let our team know if you would like additional photos (and of what) to help with the design.  We will also discuss this further in the sEPD Tuesday engineering meeting.

Regards,

Rosi

--

Rosi Reed
RHIC/AGS UEC member
Associate Professor, Physics Department
Lehigh University
(610)758-3907
16 Memorial Drive East Office 406
Bethlehem, PA 18015
she/her/hers

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