sPHENIX HCal discussion

[Christopher McGinn <chmc7718 AT colorado.edu>]

Hello,

Please find attached the preliminary analysis of four suspect HCal tiles using the LED test-stand setup here at Boulder. It is preliminary because the two tiles w/ the lowest across-the-board light output were done last, so I worry this might be an inadvertent change in setup rather than a true characterization of the tile output. I am re-running tile B25.2043.5712, which had the highest light-output and was scanned first, to make sure the current setup reproduces my initial test. If the results are comparable then these slides are solid.
 
If you need a reminder of our test setup and previous analysis, my last testing of the 4 good/4 bad tiles can be found in a presentation here:

https://indico.bnl.gov/event/8094/

Let me know if more explanation is needed or if anything looks suspicious. If folks would like a more thorough walkthrough I can present a version of these slides in the bi-weekly meeting (hopefully with the above-mentioned setup confirmation complete).

Chris

Attachment: sphenixHCal_20200731.pdf
Description: sphenixHCal_20200731.pdf