Connection

Meeting time and location:

Agenda

Preparation of parts for ECAL -- Sasha

Expected delivery date of the ECAL HV distribution boards 11/18/2024 [1][2]

Meeting with Fernando and Chris regarding updating the LMS light source, a few new LEDs have been ordered

Installation of the FCAL2 detector & integration to GlueX -- Sasha, All

- rocecal3 crate was fixed [4] (initial DAQ implementation [5])

- implementing flash ADC scalers [6][7]

- translation table for the ECAL (finalize/check translation DB, generate xml file, import to the CCDB) - done [8]

- implementing and verifying ECAL LMS trigger [9]

- implementing and verifying the ECAL physics trigger. First event reconstructed using the GlueX software [10]

- Start implementing VTP trigger modules. Requires modification of firmware. The trigger crates may be unavailable for 1 - 1.5 months.

- The VTP was installed in the D2-1-TOP crate, IP address assigned, and can be booted now

- New version of DAQ, VTP included as a DAQ component [11]

Installation of scintillating paddles for cosmic tests [12] [13][14]
ECAL HV interlock check [15]
Cable map of the ECAL LG modules after installing ECAL [16]
Reinstalling cables on the ECAL LV distribution board [17]
Safety briefings - Vlad, Sasha
Detector installation page
Commissioning north part of the ECAL (instrumented with 2 temporary HV distribution boards) [18][19][20][21]
First cosmic event in the ECAL [22]
Temperature scan in the ECAL divider region [23][24][25][26]

Meeting with Tim, additional fans will be installed

- Removing Tedlar from the face of the detector [29]

- ECAL flash ADC scalers before removing detector face cover [30]

- Installing additional fans

- Installing insulation on the detector's face

Restoring PS test setup [31]

ECAL commissioning -- Sasha, All

Laveen update[[32]]

Calibrations

-First look on cosmic data -- Zhikun

Analysis/Simulation

Update from Zhikun

Attendees: Bill, Igal, Liping, Sasha, Zhikun, Laveen, Phil, Jane, Vlad, Axel, Olga, S.T.

No change in delivery date for HV boxes
- Mounting location to be determined
- Installation in December?
Still working on increasing light output for LMS
- Increase number of LEDs to 25 in existing design
Working on improving fan implementation to reduce heat in ECAL divider region
- Some regions where air flow is low increase to >125F when the dividers are at HV
- Heat can transfer from PMT divider region to crystals
- Decreasing chiller temperature did not obviously change the temperature profile
- Receiving new/bigger fans will take about 2-3 weeks
Some fibers delivering small amount of light, added additional fibers to faces of some crystals
- After fixing a few, decided to move forward with sealing the front face of the FCAL
Laveen presented COMCAL drawings for reference PMT apparatus, to be modified for ECAL
- Need to add soft iron housing
- Also working on restoring TAC (had used Crytur crystals, now using SICCAS crystals)
Zhikun showed results of looking at data from cosmic runs
- Holes seen that were fixed over the course of multiple runs over several days
- Fit pulse integral distributions with Landau+polynomial background
- Also looked at peak positions using amplitudes
- Found mean values, see variations from channel to channel due to fixed 1040 V high voltage setting for all channels
- Plan to adjust HV settings and check with more cosmic runs