Difference between revisions of "Jun 14, 2018 Calorimeter"
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# Calibrations | # Calibrations | ||
#* [[Calibration_Dashboard#Spring_2018_Calibrations | Calibration Dashboard]] | #* [[Calibration_Dashboard#Spring_2018_Calibrations | Calibration Dashboard]] | ||
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3644 Consideration of SiPM Saturation] | ||
# Monitoring | # Monitoring | ||
# Reconstruction and Simulation | # Reconstruction and Simulation | ||
+ | ## [https://halldweb.jlab.org/DocDB/0036/003642/001/finestructuresimpresentation.pdf Fine-Grained BCAL in GEANT4 (Colleen)] | ||
+ | ## (Hopefully) some discussion of progress on reaction simulations for Photon/Neutron separation (Tolga) | ||
# NIM articles | # NIM articles | ||
# Any other business | # Any other business | ||
= Minutes = | = Minutes = | ||
− | ''Attending: | + | ''Attending: Elton, Colin, Mark (JLab); Zisis, Tegan, Colleen, Ahmed, Dhillon, James (UofR); Sean (FSU); Matt (IU); Tolga (FIU); Will (CMU); George (Athens). |
+ | |||
+ | # Announcements | ||
+ | # Action Items | ||
+ | #* SiPM saturation will be reported on later | ||
+ | # [https://halldweb.jlab.org/wiki/index.php/GlueX-Collaboration-June-2018 Collaboration Meeting Spring 2018] | ||
+ | #* Tegan will not be able to give the BCAL report. Zisis volunteered. Tegan will provide latest on gain calibrations. Mark will provide updates on other calibrations, and Elton a summary on hardware issues. | ||
+ | # Run Updates | ||
+ | ## FCAL | ||
+ | ##* No new updates. Summary on calibrations, efficiencies, etc., will be given at the collaboration meeting | ||
+ | ## BCAL | ||
+ | ##* Hot TDC channel. See [https://logbooks.jlab.org/entry/3577352 Log Entry 3577352]. Will investigate next week, but low threshold may be responsible for increased rate. | ||
+ | # Calibrations | ||
+ | #* [[Calibration_Dashboard#Spring_2018_Calibrations | Calibration Dashboard]] | ||
+ | #* Colin has updated table based on the latest status. May need to repeat some of the calibrations once the 4ns timing shifts are completed. | ||
+ | #* Colin for Jared: 4ns timing shifts have been completed for most of the 2018 runs. Will report at the collaboration meeting. | ||
+ | #* Sean: Request that everyone take a look at the most recent monitoring launch and verify output, as we are starting serious quality control. Report issues to Sean. Colin: Has looked briefly at the FCAL plots and finds no anomalies. | ||
+ | #* Zisis: Has Marouen completed the PS calibrations? Sean: He has promised but not yet delivered. Elton: Should be encouraged to save calibration code to standard repository. | ||
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3644 Consideration of SiPM Saturation] (Elton) | ||
+ | #* Elton gave a quick overview of the impact of SiPM saturation and what steps will be taken to study and address it. | ||
+ | # Monitoring | ||
+ | # Reconstruction and Simulation | ||
+ | ## [https://halldweb.jlab.org/DocDB/0036/003642/001/finestructuresimpresentation.pdf Fine-Grained BCAL in GEANT4 (Colleen)] | ||
+ | ##* Using GEANT4 implementation of the fine-grained BCAL MC to study response to cosmic-rays. | ||
+ | ##* Compare distributions to Andrei's and Irina's previous work. Preliminary comparisons look reasonable. | ||
+ | ##* Next steps are to look at 2018 data and match MC to data. | ||
+ | ##* Elton: Is the analysis within the GlueX software? Colleen: No, it is completely separate. Zisis: Plan is to incorporate it into github for general use. | ||
+ | ## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3645 GlueX-doc-3645] Discussion of progress on reaction simulations for Photon/Neutron separation (Tolga) | ||
+ | ##* Generating gp->ppi0 and gp->pi+n as a start to study gamma/neutron identification | ||
+ | ##* Tolga showed various kinematic distributions, but some are not understood | ||
+ | ##* Elton: Suggest you make a scatter plot of p_proton vs p_angle for the gp->ppi0 sample. This might indicate the nature of the two peaks in the distribution. We expect only one at about 60 degrees. | ||
+ | ##* Zisis: Look at the multiplicity and time dispersion delta t as a discriminator (studied previously by Andrei). Tolga: This is in the plan. | ||
+ | ##* Tolga: FIU has had a local workshop to work through analysis questions, which has been helpful. | ||
+ | # NIM articles | ||
+ | # Any other business |
Latest revision as of 15:06, 14 June 2018
Contents
Video Conferencing Information
Meeting Time: 11:00 a.m.
- To join via a Web Browser, go to the page [1] https://bluejeans.com/907185247.
- To join via Polycom room system go to the IP Address: 199.48.152.152 (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
Action Items
- Homework from NIM paper. Non-linearity correction of SiPMs (Elton)
- BCAL: Create non-linearity corrections for MC for gain adjustment.
- BCAL fixes: Hot TDC channel
Complete after new launch
- 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.
References
- FCAL HDFCAL log book
- BCAL HDBCAL log book
Tentative Agenda
- Announcements
- Action Items
- Collaboration Meeting Spring 2018
- Run Updates
- FCAL
- BCAL
- Calibrations
- Monitoring
- Reconstruction and Simulation
- Fine-Grained BCAL in GEANT4 (Colleen)
- (Hopefully) some discussion of progress on reaction simulations for Photon/Neutron separation (Tolga)
- NIM articles
- Any other business
Minutes
Attending: Elton, Colin, Mark (JLab); Zisis, Tegan, Colleen, Ahmed, Dhillon, James (UofR); Sean (FSU); Matt (IU); Tolga (FIU); Will (CMU); George (Athens).
- Announcements
- Action Items
- SiPM saturation will be reported on later
- Collaboration Meeting Spring 2018
- Tegan will not be able to give the BCAL report. Zisis volunteered. Tegan will provide latest on gain calibrations. Mark will provide updates on other calibrations, and Elton a summary on hardware issues.
- Run Updates
- FCAL
- No new updates. Summary on calibrations, efficiencies, etc., will be given at the collaboration meeting
- BCAL
- Hot TDC channel. See Log Entry 3577352. Will investigate next week, but low threshold may be responsible for increased rate.
- FCAL
- Calibrations
- Calibration Dashboard
- Colin has updated table based on the latest status. May need to repeat some of the calibrations once the 4ns timing shifts are completed.
- Colin for Jared: 4ns timing shifts have been completed for most of the 2018 runs. Will report at the collaboration meeting.
- Sean: Request that everyone take a look at the most recent monitoring launch and verify output, as we are starting serious quality control. Report issues to Sean. Colin: Has looked briefly at the FCAL plots and finds no anomalies.
- Zisis: Has Marouen completed the PS calibrations? Sean: He has promised but not yet delivered. Elton: Should be encouraged to save calibration code to standard repository.
- Consideration of SiPM Saturation (Elton)
- Elton gave a quick overview of the impact of SiPM saturation and what steps will be taken to study and address it.
- Monitoring
- Reconstruction and Simulation
- Fine-Grained BCAL in GEANT4 (Colleen)
- Using GEANT4 implementation of the fine-grained BCAL MC to study response to cosmic-rays.
- Compare distributions to Andrei's and Irina's previous work. Preliminary comparisons look reasonable.
- Next steps are to look at 2018 data and match MC to data.
- Elton: Is the analysis within the GlueX software? Colleen: No, it is completely separate. Zisis: Plan is to incorporate it into github for general use.
- GlueX-doc-3645 Discussion of progress on reaction simulations for Photon/Neutron separation (Tolga)
- Generating gp->ppi0 and gp->pi+n as a start to study gamma/neutron identification
- Tolga showed various kinematic distributions, but some are not understood
- Elton: Suggest you make a scatter plot of p_proton vs p_angle for the gp->ppi0 sample. This might indicate the nature of the two peaks in the distribution. We expect only one at about 60 degrees.
- Zisis: Look at the multiplicity and time dispersion delta t as a discriminator (studied previously by Andrei). Tolga: This is in the plan.
- Tolga: FIU has had a local workshop to work through analysis questions, which has been helpful.
- Fine-Grained BCAL in GEANT4 (Colleen)
- NIM articles
- Any other business