sPHENIX EMCal discussion

[eric thorsland <ericthorslandwork AT gmail.com>]

Hello folks,

       Some photos of the saw tooth and the few blocks we have that are around the block 7 pad. 

        Illinois is shy enough 123 blocks for a row, so the lineup is not really super indicative of the real stack but depending how you start it seems like the two block 7 we have here fit decently. I started with 7, and if I drop in only block 6 and push it to the radius-ed corner it looks like there is some gap. If I start with the imaginary 4 location and work up they line up  with a bit better fit. If I work each way from 8 it is even better.  

         Will have to make some 123 blocks to really do a proper duplication of what you have there. 

         With your set of 96 fitting well it will be interesting to see the survey results. It may just be an effect that diminishes as you fill a full run.

            Eric T.   

On Mon, May 20, 2019 at 8:12 AM Sean Stoll <stoll AT bnl.gov> wrote:

All,

  We did a dryfit of Sector 0 with 96 blocks this afternoon.

(A few of the blocks had wet optical couplant, so we used some spares
for the photo.)

I think all looks good. We are still waiting on the survey numbers for
the sawteeth. So maybe we want to hold off on epoxying things in place
until we see those, but we didn't see any obvious problems with the
fitting that would indicate significant dimensional issues.

"Good work" to all who contributed to the effort.

Sean


--
Sean Stoll
Physics Associate
Brookhaven Nat. Lab
Upton, NY 11973
631.344.5331

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