Difference between revisions of "Apr 23, 2015 Calorimetry"
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# FCAL [https://logbooks.jlab.org/book/hdfcal HDFCAL log book] | # FCAL [https://logbooks.jlab.org/book/hdfcal HDFCAL log book] | ||
# BCAL [https://logbooks.jlab.org/book/hdbcal HDBCAL log book] | # BCAL [https://logbooks.jlab.org/book/hdbcal HDBCAL log book] | ||
− | # | + | # [[BCAL Action Items and Working Tasks]] |
= Tentative Agenda = | = Tentative Agenda = | ||
Line 35: | Line 35: | ||
# Spring Run | # Spring Run | ||
#* [https://halldweb.jlab.org/hdops/wiki/index.php/Spring_2015_6GeV_Commissioning_Plan#Commissioning_time_chart Commissioning Time Chart] | #* [https://halldweb.jlab.org/hdops/wiki/index.php/Spring_2015_6GeV_Commissioning_Plan#Commissioning_time_chart Commissioning Time Chart] | ||
− | # FCAL Update | + | # FCAL Update |
# BCAL Update | # BCAL Update | ||
− | ## [ | + | #* [https://logbooks.jlab.org/entry/3333598 Log 3333598] |
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2695 DRAFT of GlueX-doc-2695] | ||
# Reconstruction and Simulation | # Reconstruction and Simulation | ||
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2694 DRAFT of GlueX-doc-2694] | ||
# Calibration | # Calibration | ||
# Any other business | # Any other business | ||
Line 44: | Line 46: | ||
= Minutes = | = Minutes = | ||
− | ''Attendees: | + | ''Attendees: Elton, Will, Mark (JLab); Tegan, Ahmed, Zisis (UofR), Adesh, Manuel, Matt (IU); George (Athens) |
+ | |||
+ | |||
+ | # Announcements | ||
+ | #* Steady beam to Halls A and B. | ||
+ | #* Tuning started to Hall D, but poor quality | ||
+ | # [[GlueX-Collaboration-May-2015|Collaboration Meeting]] | ||
+ | #* talks by Matt, Elton and Will | ||
+ | # Action Items | ||
+ | # Spring Run | ||
+ | #* [https://halldweb.jlab.org/hdops/wiki/index.php/Spring_2015_6GeV_Commissioning_Plan#Commissioning_time_chart Commissioning Time Chart] | ||
+ | # FCAL Update | ||
+ | ## Calibration | ||
+ | ##* Matt met with Adesh and John Zarling to discuss progress | ||
+ | ##* Most promising scheme is to use electron calibration to seed pi0 minimization scheme | ||
+ | ##* Results in a 12 MeV pi0 width. | ||
+ | ##* John will provide latest constants so that Adesh can check them and then enter them into the CCdB | ||
+ | ## Monitoring | ||
+ | ##* Pi0 peaks are already included in the monitoring plots. | ||
+ | ##* Would like to add plots with electrons to help understand trigger thresholds | ||
+ | ##* Adesh will be working on this and test plugin with files from last fall contrasting FCAL and BCAL triggered files. | ||
+ | ## JInventory update (Manuel) | ||
+ | ##* All information from detector has been added to the JInventory data base | ||
+ | ##* Now adding information about loose bases | ||
+ | ##* Manuel has written a web interface to query the dB with high level information and provide feedback on the consistency of the data it contains. | ||
+ | ## Fixes: | ||
+ | ##* Elton: Has Paul categorized/summarized failure modes of the repaired bases. Matt: Will get that information from Paul when he returns from vacation. To date he has not identified a primary failure mode. | ||
+ | # BCAL Update | ||
+ | ## [https://logbooks.jlab.org/entry/3333598 Log 3333598] | ||
+ | ##* Mark has analyzed scans of pedestal data taken by Will and Noemi | ||
+ | ##* The mean pedestal of each window (100 samples) is subtracted to remove slow time scale fluctutions | ||
+ | ##* General features include: electronic contribution ~1.2 counts; dark hit contribution only at very high over bias; temperature dependence of pedestal | ||
+ | ##* Qualitative features understood. | ||
+ | ## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2695 DRAFT of GlueX-doc-2695] | ||
+ | ##* Reproduces the main features of the pedestal width using nominal values for the gain and rate of SiPM sensors | ||
+ | ##* Increase rate by factor=1.4 to agree with data. This increase can partially be accounted for by cross-talk and after pulsing. | ||
+ | ##* Data and simulation have slightly different behavior as a function of over voltage. | ||
+ | ##* Parameterization was found that roughly fit both the data and simulation. Parameters that best fit the data were also presented. | ||
+ | ##* A single simple parameterization for 10 and 18 deg was attempted, but the two data sets have somewhat different systematics. | ||
+ | # Reconstruction and Simulation | ||
+ | ## Inclusion of dark hits into simulation (Tegan) | ||
+ | ##* Compiled and fixed errors in new code | ||
+ | ##* Current program keeps time history in histograms, but only uses summed energy. Will add pedestal fluctuations to this one. | ||
+ | ##* Next step will be to eliminate history created in HDGEANT and do all the pedestal smearing in mcsmear. | ||
+ | ##* Mark: Suggested that one should move as quickly as possible to change scheme using the time history histograms. This will simplify and speed up simulation. | ||
+ | ## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2694 DRAFT of GlueX-doc-2694] | ||
+ | ##* Note summarizes past calculations updated with as-built parameters. Should be useful basis for discussions and new students. | ||
+ | # Calibration | ||
+ | ## time/veff (George) | ||
+ | ##* Starting from plugin (original from Will, but modified by Elton) finds showers matched to charged tracks. Compare the z coordinate determined by showers with those from tracking to determined time offsets and veff cell-by-cell. | ||
+ | ## efficiencies (Ahmed) | ||
+ | ##* Completed analysis of bias runs. Results are under review by Zisis and will be posted soon. Programs are ready to be used with new scans this spring. | ||
+ | # Any other business |
Latest revision as of 16:55, 24 February 2017
Contents
Video Conferencing Information
Meeting Time: 11 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 F326 is 757-269-6460 (usual room)
- JLab Phone in CC L207 is 757-269-7084
- 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
- Work with Hovanes to activate VME LED pulser setup for FCAL (Elton). Postpone till mid May, after current run.
References
Tentative Agenda
- Announcements
- Collaboration Meeting
- Action Items
- Spring Run
- FCAL Update
- BCAL Update
- Reconstruction and Simulation
- Calibration
- Any other business
Minutes
Attendees: Elton, Will, Mark (JLab); Tegan, Ahmed, Zisis (UofR), Adesh, Manuel, Matt (IU); George (Athens)
- Announcements
- Steady beam to Halls A and B.
- Tuning started to Hall D, but poor quality
- Collaboration Meeting
- talks by Matt, Elton and Will
- Action Items
- Spring Run
- FCAL Update
- Calibration
- Matt met with Adesh and John Zarling to discuss progress
- Most promising scheme is to use electron calibration to seed pi0 minimization scheme
- Results in a 12 MeV pi0 width.
- John will provide latest constants so that Adesh can check them and then enter them into the CCdB
- Monitoring
- Pi0 peaks are already included in the monitoring plots.
- Would like to add plots with electrons to help understand trigger thresholds
- Adesh will be working on this and test plugin with files from last fall contrasting FCAL and BCAL triggered files.
- JInventory update (Manuel)
- All information from detector has been added to the JInventory data base
- Now adding information about loose bases
- Manuel has written a web interface to query the dB with high level information and provide feedback on the consistency of the data it contains.
- Fixes:
- Elton: Has Paul categorized/summarized failure modes of the repaired bases. Matt: Will get that information from Paul when he returns from vacation. To date he has not identified a primary failure mode.
- Calibration
- BCAL Update
- Log 3333598
- Mark has analyzed scans of pedestal data taken by Will and Noemi
- The mean pedestal of each window (100 samples) is subtracted to remove slow time scale fluctutions
- General features include: electronic contribution ~1.2 counts; dark hit contribution only at very high over bias; temperature dependence of pedestal
- Qualitative features understood.
- DRAFT of GlueX-doc-2695
- Reproduces the main features of the pedestal width using nominal values for the gain and rate of SiPM sensors
- Increase rate by factor=1.4 to agree with data. This increase can partially be accounted for by cross-talk and after pulsing.
- Data and simulation have slightly different behavior as a function of over voltage.
- Parameterization was found that roughly fit both the data and simulation. Parameters that best fit the data were also presented.
- A single simple parameterization for 10 and 18 deg was attempted, but the two data sets have somewhat different systematics.
- Log 3333598
- Reconstruction and Simulation
- Inclusion of dark hits into simulation (Tegan)
- Compiled and fixed errors in new code
- Current program keeps time history in histograms, but only uses summed energy. Will add pedestal fluctuations to this one.
- Next step will be to eliminate history created in HDGEANT and do all the pedestal smearing in mcsmear.
- Mark: Suggested that one should move as quickly as possible to change scheme using the time history histograms. This will simplify and speed up simulation.
- DRAFT of GlueX-doc-2694
- Note summarizes past calculations updated with as-built parameters. Should be useful basis for discussions and new students.
- Inclusion of dark hits into simulation (Tegan)
- Calibration
- time/veff (George)
- Starting from plugin (original from Will, but modified by Elton) finds showers matched to charged tracks. Compare the z coordinate determined by showers with those from tracking to determined time offsets and veff cell-by-cell.
- efficiencies (Ahmed)
- Completed analysis of bias runs. Results are under review by Zisis and will be posted soon. Programs are ready to be used with new scans this spring.
- time/veff (George)
- Any other business