sPHENIX HCal discussion

[Megan Connors <meganEconnors AT gmail.com>]

Hi Edouard, all,

Attached is the tile/sipm mapping file I have. It would be good to cross check this with the list they made when taking the tiles out of the prototype too. 

Best,

-Megan

On Mon, Nov 14, 2016 at 10:38 AM, Edouard Kistenev <kistenev AT bnl.gov> wrote:

Hi, Megan, Abhisek and everyone,
just before the tiles were extracted from t1044 prototype I took few runs with self- and external- cosmic triggers in HInner and HOuter. While HOuter looks reasonably stable between run 2029 (April 11) and now (one tower is different by x2), the changes to mu-peaks in HInner are too random to explain by for example global change in applyied bias.
All tiles are already on the desk in HB - I am sure you know how to find those which belong to specific towers and reestablish the ordering - please help - I would like to have a closer look on outliers.

The first one to see is #7 (2/1) in HOuter, maybe (0/0 and 2/0) in HInner (first moved up by x1.5 second down by the same factor).

We would also need to pay more attention to the gain of electronics - probably need someone to look into preamp gains at least in towers which changed the mu-peaks too much. It is simple - find single pixel value connecting different preamps to the same SiPM (maybe to different inputs on bad preamps if found).

                        Edward

Attachment: hcalprototypemapping.xlsx
Description: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet