Hall D Beam Test Daily Meeting

Thursday 7 May 2026, 13:00 → 14:00 US/Eastern

https://uregina-ca.zoom.us/j/98915102548?pwd=6Be10hz7OQ3WLS2NvFGKcenSx5MbF6.1

13:00 → 13:15 Progress report on beam test

Reports on all aspects of the tests (mechanical, ScFi, SiPMs, HGCROC, RCDAQ, etc.)

eLOG: http://localhost:13666/ePIC_BIC/
Run information summary: https://docs.google.com/spreadsheets/d/1A1WHqhv_xIBiuXv_9bHU0ouF-x_MO-xO1tQLETT0LFM/edit?usp=sharing

See minutes added (on the right)

Speakers: Maria Zurek (Argonne National Laboratory), Zisis Papandreou (University of Regina)

Summary of the meeting:

Baby BCAL CAEN channels that were working yesterday after short morning (specifically SA6, and SA7, NA4) stopped working in following data. Zisis and Halen went down and remapped the channels, but more M0 channels stopped working. It might be dying.
Short-Term Hall Access Plan

For a short access window, around 10 minutes:

• Go down to the hall.
• Re-touch/check the cables.
• Power-cycle the CAEN using the button on the back.

For a longer access window:

• Proceed with the recabling plan.

Recabling Options

We have 12 channels available at M1. The possible configurations are:

1. A0, A1, A2, A3 + A5, A6 on both sides, South and North
   • This keeps energy measurements on both sides and preserves timing information.
2. A1, A3 + A4, A5, A6, A7 on both sides, South and North
3. A1, A3 + A5, A6 + A9, A10 on both sides, South and North
   • Note: module S10 may be problematic.

Another possibility is to instrument only one side of M1, but this would create issues for timing, especially for the ΔT measurement.

Beam and Calorimeter Energy

Based on the PS plots, we are likely running with approximately 0.8–1.2 GeV photon energy. This means the energy deposited in the calorimeter will likely be at most about 0.4–0.6 GeV.

The nominal current is set to 110 A. Given the relatively low calorimeter energies, leakage may not be too severe, but this should be checked in simulation.

Disk Space

Disk space is the next priority.

• Martin will try to send SATA disks to JLab.
• If enough SATA connections and physical disk slots are available, this may provide a near-term solution for additional storage.

Paddle Calibration and DAQ

Zisis will contact Sasha about the paddle calibration.

Open questions:

• Are our paddles included in the DAQ?
• Can we quickly obtain the calibration for them?

Halen will look into this.

 

13:15 → 13:20 Analysis Updates

HGCROC, AstroPiX, Baby BCAL, Trigger, Synchronization, Simulations

Speakers: Akshaya Vijay (University Of Manitoba), Bobae Kim (Argonne National Laboratory), Henry Klest (Argonne National Laboratory), Jared Richards (University of Connecticut), Jared Richards (member@anl.gov), Maria Zurek (Argonne National Laboratory), Norbert Novitzky (ORNL), Mr Olaiya Olokunboyo (UNH)

13:20 → 13:25 DAQ Updates

Speaker: Martin Purschke (BNL)