General EEEMCal Meeting Summary 9/9/22

PARTICIPANTS: Renee, Sasha, Tanja, Richard, Carlos, Hrachya, Irina, JMU, Joerg, Larry, Rosi, Silvia, Hamlet, Vardan,

MSRI PROPOSAL SCIENCE CASE DISCUSSION

• Overall Science Case - for EM calorimeters (electron endcap and barrel) --> detection and identification of scattered electron

• Inclusive saturation --> access to gluon distribution, nuclear PDFs
• Inclusive adding polarization --> access to gluon helicity
• Inclusive with low-x extension
• Technique Rosenbluth separation connects all these (also includes DCVS and deep exclusive channels) --> need for acceptance and resolution

• Purely inclusive physics - even without polarization

• Look at saturation - flagship measurement
• Reduced cross section gives access to F2 and FL (access to gluon distribution)

• The way the measurement is done is through Rosenbluth separation

• requires wide kinematic coverage
• need large acceptance

• Saturation Plots:

• Inclusive R: shows how measurements constrains
• better focus on inclusive and make that strong

• When outside saturation can look at nucear PDFs

• same thing, but different regime
• nice thing to tie together calorimeters
• Plot from YR: gluon helicity

• Adding polarization to mix - add gluon distribution, same electrons, but now take into account polarization

• now can constrain deltaG
• extension

• Low x connection to deltaG - connect helicity with saturation

• same tools used to get into saturation sector
• Not clear where it is - use kinematic plots and mark where detectors are

• Can also look at coherent diffraction (need scattered electron, BUT also need forward nucleus or proton; if don't have that need rapidity gap)

• requires detectors other than calo detectors
• Plot: different saturation models
• nice thing: first day measurement
• probably better to omit it as requires other detectors
• Plot: FL diffractive - needs other detectors

SCIENCE CASE DISCUSSION AND ACTION ITEMS

• Science case overall good
• Need to shape the science case for non-experts
• next step: polish the science case, write it down
• Aim for presenting strategy to the NSF in October

BROADER IMPACTS DISCUSSION

• Broadening participation in STEM
• Education
• Outreach
• Technology

• Next steps:

• polish, write
• mini task force: Rosi, Larry, Joerg, JMU

PROTOTYPE BEAM TESTS

• Update from Crytur on prototype JLab beam tests preparations

• SiPM: Hamamatsu 15um pixel, 3mm x 3mm

• can instrument five blocks at the moment - waiting for delivery for additional pieces

• electronics re-designed with fewer components

• same time resolution
• less power consumption

• JLab 40cm prototype preparations ongoing - anticipate running in October

UPDATE FROM PROJECT

• Monitoring system

• NPS existing system based on fibers and LEDs
• can be adapted from NPS to EIC
• IJCLab-Orsay can start working on that

• EEEMCAL simulation meetings

• post meetings on Indico

NEXT MEETING: FRIDAY 30 SEPTEMBER AT 8AM ET