Latest revision as of 08:21, 19 November 2024

Connection

Meeting time and location:

• 9:30 am EST (JLab time) remote only
• Connection information

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

• Implementing ECAL into the GlueX DAQ [3]

- 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

• Repairing a few ECAL LMS optical fibers [27][28]
• Preparing for the installation of the insulation on the detector face

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

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

• FCAL2 Engineering Meetings
• Remaining installation tasks

- 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

Minutes

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