Dec 12, 2019 Calorimeter
Revision as of 07:09, 13 December 2019 by Elton
Meeting Time: 11:00 a.m.
- To join via a Web Browser, go to the page  https://bluejeans.com/907185247.
- To join via Polycom room system go to the IP Address: 126.96.36.199 (bjn.vc) and enter the meeting ID: 907185247.
- To join via phone, use one of the following numbers and the Conference ID: 907185247.
- US or Canada: +1 408 740 7256 or
- US or Canada: +1 888 240 2560
- Upon connection all microphones are automatically muted. To unmute your mike on a Polycom or equivalent unit, enter *4. Unmuting on a computer is trivial as there is a microphone button than can be clicked.
- More information on connecting to bluejeans is available.
Participant Direct Lines
- JLab Phone in CC L207 is 757-269-7084 (usual room)
- JLab Phone: in CC F326 is 757-269-6460
- Phone in the Regina Video-conference Suite is 306-585-4204
- Athens Phone: in Christina's office is 011-30-210-727-6947
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%.
- Take a new noise measurements of the BCAL FADC baselines (Mark and Jon) ✔️
- Evaluate effect of conversions in FCAL efficiency determination with particle gun and reactions (Richard suggestion -> Jon) ✔️
- Proposal for updating BCAL gain constants 2019 / extrapolation to higher energy (Karthik)
- Read calorimeter section of NIM paper and provide feedback (Matt)
- 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
- Action Items
- Run Updates
- BCAL-LED update (Varun)
- FCAL energy resolution
- NIM articles
- Any other business
Attending: Elton, Colin, Rupesh, Jon, Mark (JLab); Varun, Karthik, Ahmed, Zisis (UofR); Tolga (FIU); Sean (FSU); Matt (IU)