General EEEMCal Meeting Summary 2/7/25

PARTICIPANTS: Afnan Shatat, Holly, Carlos, Douglas, Tanja, Ethan, Matthew Nguyen, Renee, Rosi, Larry, Justin, Sasha, Vardan, Joerg, Hrachya, Julie, Hamlet,

DESY BEAM TEST PREPARATION

• Overall Goal of the February test: test different readout chains (e.g., discrete vs. ASIC) with Orsay prototype

• Orsay prototype is ready. Will be shipped to DESY with expected arrival on 12 Feb

• some personnel will arrive on Friday 2/14 to start setting up DAQ; assembly of the prototype will follow on Monday after the safety lecture as some personnel need to pass that training

• Discrete readout chain preparation are on track

• PCBs arrived at JLab and were sent on to Gerard after minor modifications
• Larry has been working on the power cables/distribution box and has sent them on to Gerard
• Gerard is planning to do some tests of both
• Justin will pick up all components from Gerard including a LV power supply and bring everything to DESY

• An overall run plan for the February beam test has been discussed - details are still being sorted

• Next beam test preparation meeting is on 11 February at 10:30AM ET

• Looking ahead there are 2-3 additional beam tests planned:

• 24 March++ at DESY: direct comparison of PMT/SiPM, Crytur prototype with different readout and chain, and any additional readout chain tests based on February investigation

• is any pulse shaping needed for the PMTS? Note that the same digitizer (V1725) has been used in previous beam tests with PMT. May need to review the details

• June at DESY: contingency. Need to start coordinating this beam slot as Douglas and Ethan will likely not be available or not available for the entire time
• June/July at JLAB: initial discussions have started on how to integrate the ASIC based readout with the HD infrastructure, but need to follow up on the details

NSF PROPOSAL

• Discussion about possible proposal planning

• Given that the proposal submission deadline is still posted as 19 March 2025 and the review uncertainty it may be wise to give SPOs a heads up

OTHER

• Discussion with ePIC-DSC on 7 Feb

• discussion in EEEMCAL context about the points circulated by ePIC TC
• Carlos/Tanja will report from the meeting

• Discussion about ongoing reports

• European strategy plan is out for review
• pre TDR time line more relaxed - summer to end of year

• Discussion about documentation and upcoming final design review

• Action: need to identify a good way to generate the needed documentation

• how are previous documentations folded in?
• how are recent/ongoing beam tests folded in?

NEXT MEETING: FRIDAY 21 FEBRUARY AT 8:00 AM ET

TC-DSC MEETING 7 Feb 2025 - Notes

• Overall EEEMCAL in good shape and moving along at a reasonable pace

• Workforce

• simulation has been weak. Have expert from UKY and personnel from AANL. Unclear how one would fill in more personnel

• Final design review planning

• mechanical design at the required level
• remaining item is the readout chain details - have beam test planned at DESY and at JLAB and hope to have the information very soon

• Long lead procurement crystals - any specifications still needed?

• No. Had final design review and specifications have been set.

• NSF proposal status

• deadline for full proposal submission (by invitation based on pre-proposal) is on 19 March 2025. Pre-proposal was submitted and awaiting feedback.

• Documentation

• Discussing preparation of a tech note independent of pre-TDR. This written documentation could be used as pre-brief for a final design review and as reference material for pre-TDR or a future EEEMCAL publication

• Cooling

• idea is to have a standalone design to cool the EEEMCAL and some safety margin for external sources
• planned are simulations and prototype tests for the cooling

• Light monitoring/calibration system status

• EEEMCAL will use LEDs for light monitoring, but not calibration
• A concept exists from NPS

• ASIC - any dependence on the ePIC chip development

• No. EEEMCAL uses HCGROC - have all information available for making decisions for EEEMCAL