|
|
| (14 intermediate revisions by 2 users not shown) |
| Line 1: |
Line 1: |
| − | # FCAL: [orphan item] 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. | + | # Covariance matrices for photons; need pull distributions (Regina could help); add these to best practices page [Mark] |
| − | ##50634 - FCAL Green LED: 1kHz, 29 V, Livetime is 9%, 1.7 M events | + | # BCAL hot channels. Investigate and see if baseline or other improvements are possible; Regina students could help. |
| − | ##50635 - FCAL Violet LED: 1kHz, 22 V, Livetime is 9%, 1.4 M events
| + | |
| − | ##50636 - FCAL Blue LED: 1kHz, 15 V, Livetime is 9%, 1.5 M events
| + | |
| − | # Tegan's work on comparing G3 (HADR1 and HADR4) and G4: he has run photon, pi+, pi-, proton particle guns, ρ events and π-Δ++ events. 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. Data vs MC tails look ok (in G4 and G3H4). Work is ongoing: Tegan will look at Gaussian part of peaks (to see if tighter cuts can be used). See plots at [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4878 GlueX-doc-DB] and [https://halldweb.jlab.org/wiki/index.php/HDGeant4_Meetings HDGEANT4 meeting] notes.
| + | |
| − | # Neutrons: revisit this work; could look at neutron efficiency in hyperon channels, etc.
| + | |
