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| − | # FCAL: Fernando and co. converged on a plan for baserepairs: will take 25 weeks to complete the FCAL repair cycle (342 units) during SAD. (See Fernando's email from Sep 18, 2020.] Work is in progress: The first 100 bases are back in the FCAL now (Feb 2021). | + | # Covariance matrices for photons; need pull distributions (Regina could help); add these to best practices page [Mark] |
| − | # FCAL: It has been noticed that the pi0 mass shifts when the LED pulser runs at high rate. This is still not understood. See [https://logbooks.jlab.org/entry/3595928 Log Entry 3595928] and references. Several runs have been taken in raw mode. These runs exhibit the shift in pi0 mass with LED running at 1 kHz. There is a need to analyze these to try to determine the cause. Susan will undertake this task.
| + | # BCAL hot channels. Investigate and see if baseline or other improvements are possible; Regina students could help. |
| − | ##50634 - FCAL Green LED: 1kHz, 29 V, Livetime is 9%, 1.7 M events | + | |
| − | ##50635 - FCAL Violet LED: 1kHz, 22 V, Livetime is 9%, 1.4 M events
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| − | ##50636 - FCAL Blue LED: 1kHz, 15 V, Livetime is 9%, 1.5 M events
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| − | # Tegan's work on comparing G3 (HADR1 and HADR4) and G4: he is running photon, pi+, pi-, proton particle guns. This effort started with Colin's [https://github.com/JeffersonLab/HDGeant4/issues/111#issuecomment-657062174 observations on acceptance for the eta-pi] and continued with Sean's [https://github.com/JeffersonLab/HDGeant4/issues/179 observations on proton timing], which Lubomir reported in J/psi production. Tegan is now looking at Trajectory Point class, with help from Richard, Sean and Beni. Richard checked in a new heavy-no-light branch to GitHub. Next, Alex will provide a ρ data sample to Tegan for a look. This work is reported at HDGEANT meetings since December 1, 2020. See meeting notes: https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meetings
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