sPHENIX HCal discussion

["Lajoie, John G [PHYSA]" <lajoie AT iastate.edu>]

Hi Russ,

 

You’ve been in 1008, right? 😊  Nothing will stay clean in there either.

 

I think it’s fine to wipe down the exterior, but if you are going to do that it should be done immediately prior to assembly, otherwise it will be wasted effort. They should be gently wiped, I wouldn’t use a vacuum to avoid static concerns.

 

John

 

From: Feder, Russell <rfeder AT bnl.gov>
Sent: Wednesday, May 26, 2021 10:03 AM
To: Lajoie, John G [PHYSA] <lajoie AT iastate.edu>; sphenix-hcal-l AT lists.bnl.gov
Cc: Pontieri, Chris <cpontieri AT bnl.gov>; stefan.bathe AT baruch.cuny.edu; Toldo, Frank A <fatoldo AT bnl.gov>; Allen, Aron <allena AT bnl.gov>
Subject: Re: action items for oHCAL assembly testing

 

John, Stefan,

The sectors are dirty.  There is pollen and other dust and schmutz on all the sectors.  I think we should add some steps to clean the sectors either in 912 or 1008.  

Maybe just a wipe down with a damp clothe...maybe some kind of gentle vacuum...not sure.

Russ

 

Russell Feder

Brookhaven National Lab

sPHENIX Chief Mechanical Engineer

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

631-655-2491

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From: Lajoie, John G [PHYSA] <lajoie AT iastate.edu>
Sent: Wednesday, May 26, 2021 10:48 AM
To: sphenix-hcal-l AT lists.bnl.gov <sphenix-hcal-l AT lists.bnl.gov>
Cc: Feder, Russell <rfeder AT bnl.gov>; Pontieri, Chris <cpontieri AT bnl.gov>
Subject: action items for oHCAL assembly testing

 

Dear HCAL’ers:

 

Here are some notes and action items on the HCAL barrel assembly sector testing from yesterday’s HCAL meeting. These are from my notes, so please respond on the list if there is anything I am missing:

 

1. Sectors will move in groups of ~four from 912 to 1008, and be tested prior to installation in 1008 using LEDs. Modules will need to be set in 1008 so the electronics boxes are accessible.
2. Need to test the short rack to see if we can first the LEDs for groups of individual tiles. The short rack uses a modified firmware but Steve Boose thinks it should still work if tested properly – Stefan, Dan
3. Need to get a new short rack prepared so we have one in 912 for iHCAL assembly testing.  Stefan notes that for the iHCAL it is very possible that testing may become the bottleneck. Eric notes that setting up a new rack will have to get worked into the already overloaded technician schedule. – Eric, Sa
4. We agreed that it would be best to keep the post-installation testing procedure such that it is as simple as possible and requires as little additional training as possible.  To do this we will have the technicians plug in the cable to the electronics box and have the testers work with the short rack (on the platform).  This assumes we will succeed with testing more often than we will fail, but we will need some people with the additional training to work directly on the sector at height (accessing the electronics box or removing covers).  Need to define the required training for both situations. This will be different for the first 13 sectors and the remaining sectors – Chris Pontieri
5. Workforce is a huge issue. Right now we are not only limited in the number of people we can have onsite (2 per location) but the ROOP only allows them to work in one location. This means we can’t have people in 912 go to 1008 to test for a few hours, and then return to work in 912.  This is highly inefficient of the limited workforce we have available. Once iHCAL assembly starts we will need additional workforce in 912 and the current distancing requirements (even for vaccinated people) interferes with this as well. Housing (apartments) are currently limited to one occupant. Ed has been made aware of these concerns, but there are meetings this week where he can push to have modifications made consistent with safety.  Glenn suggested a summary of concerns be sent to Ed to give him ammunition – Stefan (done)

 

John

 

John Lajoie

he, him, his

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu