General EEEMCal Meeting Summary 6/16/23

Participants: Cristiano, Sasha, Carlos, Larry, Carlos Y., Tanja, Hamlet, Julien, Renee, Hrachya, Julie, Artur, Rosi, Joerg, Olivier (Crytur-USA), Ioana, Vardan, Yeran, Dmitry

SIPM SPECS DISCUSSION (All)

• EIC Project requests SiPM specs table for EEEMCAL: Official spreadsheet at this link

• Voltage is important if light is not mixed up well - for crystals the light is mixed well and uniform and not much sensitivity is expected

• Variation of operating voltage of tray

• Current design has an array of 3x3 or 4x4 SiPMs in a matrix with one output per matrix
• May need to comment on sensitivity to gain variations between individual SiPMs - check JLab studies

• When listing specs keep in mind the variations - tolerances

• Efficiency cannot be changed by changing operating voltage

• SiPM review is expected for July 2023

• Action Item: collect all documentation on tests carried out at IJCLab-Orsay and JLab and check table entries

ENGINEERING UPDATES (Julien)

• One of main focus areas is clearances with other infrastructure, e.g., the beam pipe and the DIRC frame - discussions are ongoing between EEEMCAL representatives (Julien, Jim, Josh) and the EIC Project technical team

• One the integration/installation side of the EEEMCAL into the DIRC frame the rails option is being studied in details

• assembly depends on positioning of the rails

• Overall, need assembly space at BNL for the EEEMCAL

• Discussion about space for cables and stress on cables in the assembly

• general idea is to use stretchers, but more studies are planned

EEEMCAL ORGANIZATION (Tanja, Carlos)

• Request from EPIC to provide a first draft of work packages and organizational structure

• Discussion of two slides put together using existing material and adding in international institutions

• Action items:

• Update the chart directly so it looks nicer (Julie)
• Update the numbers on page 2

ELECTRONICS READOUT (Olivier)

• Collaboration of Czech/US governments

• Aim would be at next generation of prototypes with 6mm x 6mm SiPMs and larger array, e.g., 5x5

• Proposals are due on 19 July and funding starts in early 2024

• Next: need a letter of intent

• Scope of work

• Crytur: electronics, build prototype
• BNL/JLAB: receive prototype, evaluate - possibly with beam, tests

• Action item: follow up on this with EIC management

PERFORMANCE SPECS

• Crystal specs - have been transmitted. Review will be beginning of July

• Dedicated meeting on constant term is being planned - calibration, monitoring etc.

NEXT MEETING: FRIDAY 23 JUNE AT 8AM ET