Difference between revisions of "Oct 18, 2018 Calorimeter"
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= Minutes = | = Minutes = | ||
− | ''Attending: Elton, Tolga, Colin, Beijiang Liu, Colin, Mark (JLab); Sean (FSU); Christina, George (Athens); Jon, Matt (IU); Tegan, Zisis, Karthik Suresh (UofR) | + | ''Attending: Elton, Tolga, Colin, Beijiang Liu, Colin, Mark, Liping (JLab); Sean (FSU); Christina, George (Athens); Jon, Matt (IU); Tegan, Zisis, Karthik Suresh (UofR) |
# Announcements | # Announcements | ||
#* We welcome Karthik Suresh, new student at Regina, and Beijiang Liu from the Institute of High Energy Physics, China. | #* We welcome Karthik Suresh, new student at Regina, and Beijiang Liu from the Institute of High Energy Physics, China. | ||
# Action Items | # Action Items | ||
− | # | + | ## To be completed along with the efficiency goals for calorimetry working group. |
+ | ## Sean: MC generated with Richard's changes. Sean checked that the pi0 mass was ok in Geant3, but shifted down by up to 10% for Geant4. Richard will investigate with the photon particle gun. | ||
+ | ## Matt: Need a monitoring plot to easily evaluate status of pedestals. Current plots seem to have a normalization that is not understood. Tolga volunteered to take a stab at this problem. | ||
# Goals for Calorimetry Group | # Goals for Calorimetry Group | ||
#* [https://halldweb.jlab.org/DocDB/0037/003757/001/CM_2018_09_WGDicussion.pdf Working Group Discussion] | #* [https://halldweb.jlab.org/DocDB/0037/003757/001/CM_2018_09_WGDicussion.pdf Working Group Discussion] | ||
Line 62: | Line 64: | ||
# Run Updates | # Run Updates | ||
## FCAL | ## FCAL | ||
+ | ##* A smaller group will meet with Paul Smith and Fernando Barbosa on Monday to discuss possible changes to hardware to improve reliability. | ||
## BCAL | ## BCAL | ||
# Calibrations | # Calibrations | ||
− | # | + | ## [https://halldweb.jlab.org/DocDB/0034/003475/013/OCT10nonlinearmc_postcorrection.pdf BCAL MC nonlinear shower energy correction] (Tegan) |
+ | ##* Checking the non-linearity of BCAL showers in MC. | ||
+ | ##* Currently not using SiPM saturation code. | ||
+ | ##* Finds non-linearity correction ~1% above 1 GeV. Below 1 GeV larger corrections are needed. | ||
# Reconstruction and Simulation | # Reconstruction and Simulation | ||
#* Efficiency Updates [https://halldweb1.jlab.org/wiki/index.php/File:GlueX_cal_10_18_18.pdf (Jon)] | #* Efficiency Updates [https://halldweb1.jlab.org/wiki/index.php/File:GlueX_cal_10_18_18.pdf (Jon)] |
Revision as of 15:26, 18 October 2018
Meeting Time: 11:00 a.m.
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Contents
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
Action Items
-
BCAL and FCAL: Develop standard fiducial volume cuts for the calorimeters.Will be completed as part of the goals for efficiency measurements. - FCAL: Cross check MC changes by Richard to make sure that gains are not affected in both Geant3 and Geant4 (Matt/IHEP)
- Fix FCAL online monitoring plugin to properly plot low level digi quantities in 2D displays. 2D display of pedestal is hard to get because occupancy plot is filled in a different loop. (Matt)
MC check not to be forgotten
- 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.
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%.
References
- FCAL HDFCAL log book
- BCAL HDBCAL log book
Tentative Agenda
- Announcements
- Action Items
- Goals for Calorimetry Group
- Run Updates
- FCAL
- BCAL
- Calibrations
- Reconstruction and Simulation
- Efficiency Updates (Jon)
- nan in bcal showers (From Beni)
- NIM articles
- Any other business
Minutes
Attending: Elton, Tolga, Colin, Beijiang Liu, Colin, Mark, Liping (JLab); Sean (FSU); Christina, George (Athens); Jon, Matt (IU); Tegan, Zisis, Karthik Suresh (UofR)
- Announcements
- We welcome Karthik Suresh, new student at Regina, and Beijiang Liu from the Institute of High Energy Physics, China.
- Action Items
- To be completed along with the efficiency goals for calorimetry working group.
- Sean: MC generated with Richard's changes. Sean checked that the pi0 mass was ok in Geant3, but shifted down by up to 10% for Geant4. Richard will investigate with the photon particle gun.
- Matt: Need a monitoring plot to easily evaluate status of pedestals. Current plots seem to have a normalization that is not understood. Tolga volunteered to take a stab at this problem.
- Goals for Calorimetry Group
- Working Group Discussion
- The proposed goals were discussed briefly, with a consensus that they were important and timely.
- Run Updates
- FCAL
- A smaller group will meet with Paul Smith and Fernando Barbosa on Monday to discuss possible changes to hardware to improve reliability.
- BCAL
- FCAL
- Calibrations
- BCAL MC nonlinear shower energy correction (Tegan)
- Checking the non-linearity of BCAL showers in MC.
- Currently not using SiPM saturation code.
- Finds non-linearity correction ~1% above 1 GeV. Below 1 GeV larger corrections are needed.
- BCAL MC nonlinear shower energy correction (Tegan)
- Reconstruction and Simulation
- Efficiency Updates (Jon)
- nan in bcal showers (From Beni)
- NIM articles
- Any other business