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[Daniel A Cebra <dacebra AT ucdavis.edu>]

Hello TPC experts, We just started taking 4. 5 GeV FXT data yesterday at about noon. I have been comparing the Online and L4 performance plots from the new run to those from 4. 5 GeV FXT data taken in 2020. I see a few performance/calibration

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Hello TPC experts,

   We just started taking 4.5 GeV FXT data yesterday at about noon. I have been comparing the Online and L4 performance plots from the new run to those from 4.5 GeV FXT data taken in 2020. I see a few performance/calibration issues that raised some concern and I wanted to check with the experts. I have attached a few slides to show the issues. These might be related to the calibrations that L4 is using or they might be related to the fact that we are missing many iTPC RDOs. Please take a look.

Best, Daniel

Attachment: TPC_issues_Jan_2026.pdf
Description: TPC_issues_Jan_2026.pdf