Jan 9, 2020 Calorimeter
Meeting Time: 2:00 p.m.
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Goals for Calorimetry Group
- Determine preliminary photon reconstruction efficiencies as a function of E, phi and theta in data and simulation with a point-to-point precision of at least 5%.
- Measure systematics of pi0/eta mass calibration as a function of detector position to a precision of at east 5 MeV.
- Demonstrate agreement of photon reconstruction efficiency and resolution between data and simulation as a function of E, phi and theta to within 5%.
- Proposal for updating BCAL gain constants 2019 / extrapolation to higher energy (Karthik)
- Systematically fix labels on FCAL crates (Colin/Elton)
- Ship back bases to IU that fail repair (Colin)
- Order spare FCAL electronics (Elton)
- Complete Calorimeter work packages
- From Mike's work: -cos(phi) type dependence in the data and a phi dependence at the downstream end of the bcal. See Sep 21, 2017 Calorimeter Meeting.
- FCAL: It has been noticed that the pi0 mass shifts when the LED pulser runs at high rate. This is still not understood. See 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:
- 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
- 50636 - FCAL Blue LED: 1kHz, 15 V, Livetime is 9%, 1.5 M events
- Collaboration Meeting February 13-15, 2020.
- Action Items
- Run Updates
- Quick look at a few pull distributions (Jon)
- post processing (non-linearity, covariance matrices)
- Geant4 BCAL reconstructed energy bad in runs < 40000? See github issue here
- NIM articles
- Any other business