2.25.2019 EC

• Status of the hodoscope construction (Rafo) 

Hodoscope construction is progressing well. Fibers are glued in PMT adapters and have been polished. Assembly of scintillator layers is complete as well. The next step is the final assembly on the frame, on the flange. Unfortunately, during the tests, one of the PMTs was broken. Fortunately, there is a spare from Hall-B BOM that can be used before the replacement will be purchased.  The full assembly will be done by the first week of March.

• Status f the SVT upgrade (Tim)
  

The vendor sent 12 out of 20 sensors. Unfortunately, instead of passivating only the slim edge, they used nitride on a larger area of the back side blocking the normal location for HV connection. That will be fixed by gluing a Al-foil (20-30 um) to extend the bias, making additional work. After assembly of the first hybrids, it was found that somewhat longer pigtails will be needed if we do not end up replacing Layer 1 with Layer 0 modules.  The rest of the hybrids will be built with longer pigtails and the shorter ones will be set aside with the expectation that the plan for Layer 1 will become clear before we need them.

• Simulations with 2019 detector (Maurik)

 Not much progress on MC, although tests are ongoing to finalize the setup. 

• Status of 2016 data processing (Rafo)

Rafo reported that 60% of the data are now processed. Last week was very productive for HPS on the JLAB farm. If it stays that way, he expects 10-15 more days to complete the processing.  About 5-10% of jobs failed and will need to relaunch them after everything is done. The full completion of processing is expected by end of March.

At the end of the meeting, there was a long discussion about track-ECal cluster matching and cluster position corrections. More work will be needed to understand some of the odd distributions seen in data.