Agenda

Preparation of parts for ECAL -- Sasha
- - HV long cable: Sammy and Mindy have to assemble 10 cables
- - HV distribution boards. Chris has completed the design of the HV distribution boards. We met with Chris, Tim, and Scot regarding location of the boards on the detector frame
- - LED: Started testing the prototype of the LMS (need to make the detector room light tight)
Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen
- Report from students [1]
- Installation of HV cables [2]
- Installation and testing cables and dividers [3]
- Installation of long signal cables [4]
- Installation LV patch panels and cables [5]
- Installation of optical fibers [6]
- Detector installation page
- Safety briefings
Students -- Sasha
- - Expect one student from Wuhan, paperwork is in process.
Beam tests with the PS
- - measure shower beam profile and reconstruction in the crystal/LG transition region
  - (install prototype with 5x5 PbWO4 modules + ? LG)
Other hardware projects
- prototype of the ECAL veto counter (?)
Analysis/Simulation
- What is the optimal incident photon-beam energy range to search for eta to ggpi^0?

Minutes

Attendees: Igal, Bill, Phil, Sasha, Laveen, Vlad, Liping, Zisis, Olga, Ilya, S.T.

Detector support group assembling HV cables (have 26 out of 36)
Design of HV distribution board completed, boards need to be installed in hall
Have prototype for LED driver pcb for LMS
Cabling of detector continues, starting upper part of ECAL
- Goal to finish by end of August
- Plan to check layer-by-layer after row of PMT dividers installed
- Need to think about checking with DAQ, but DAQ won't be fully ready until (perhaps) September
Igal presented an update on his continuing η→π0γγ studies
- Argued that boost argument for background suppression is not valid for this channel
- Argued that running at lower beam energies than nominal GlueX settings might be beneficial for JEF program because the η cross section is higher and 2π0 background appears to be lower
  - Compared data for Eγ>8.3 GeV and 3 < Eγ < 6 GeV
  - Fit using shapes from MC appears to work well
  - No significant signal for η→π0γγ seen in any of M(π0γγ) distributions
Ilya and S.T. exchanged plots showing close shower separation for two showers in insert using two different implementations of island algorithm showing good agreement
Zisis suggested writing an internal report about the current state of analysis/simulation for JEF -- S.T. agreed to start working on a draft