Difference between revisions of "Π polarizability Meeting Apr 14, 2021"
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# [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]. This link points to the draft response to the ERR. | # [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]. This link points to the draft response to the ERR. | ||
## MWPCs (fabrication, testing) (Rory) | ## MWPCs (fabrication, testing) (Rory) | ||
− | ## Trigger rates (beam test analysis, expectation with target pulled back) (Ilya) | + | ## [https://userweb.jlab.org/~ilarin/cpp/trigrate_vs_tgtpos.png Trigger rates (beam test analysis, expectation with target pulled back)] (Ilya) |
## Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David) | ## Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David) | ||
## Analysis (low level reconstruction, monitoring) (David to write paragraph) | ## Analysis (low level reconstruction, monitoring) (David to write paragraph) | ||
Line 60: | Line 60: | ||
## Microscope move (Elton) | ## Microscope move (Elton) | ||
##* Meeting with Richard and Jim on April 12 @ 1:30 pm. | ##* Meeting with Richard and Jim on April 12 @ 1:30 pm. | ||
− | ##* | + | ##* By straddling the vacuum chamber support, we can move the microscope downstream by 280 cm. |
## Timeline to publication | ## Timeline to publication | ||
## Table of responsibilities | ## Table of responsibilities | ||
Line 71: | Line 71: | ||
== Minutes == | == Minutes == | ||
− | '' Attending: | + | '' Attending:Elton, Albert, Andrew, Beni, Ilya, Mark, Rory |
+ | |||
+ | # Previous CPP meeting: [[π polarizability Meeting Apr 14, 2021|Apr 14, 2021]] | ||
+ | # Announcements | ||
+ | # Action Items | ||
+ | # [[CPP and NPP Readiness Review]] | ||
+ | # [https://drive.google.com/drive/folders/1aiSOVh4zWwnObV5fA0eF-OXG8YbE14pO?usp=sharing Responses to the ERR]. This link points to the draft response to the ERR. | ||
+ | ## MWPCs (fabrication, testing) (Rory) | ||
+ | ##* Good progress. Two more sections more. | ||
+ | ##* Started stringing the 8th (last) MWPC last week, now that students are back on campus | ||
+ | ##* Elton: We should create single-page summary of MWPC, as was done for all previous GlueX detector systems. See [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2376 GlueX-doc-2376] | ||
+ | ## [https://userweb.jlab.org/~ilarin/cpp/trigrate_vs_tgtpos.png Trigger rates (beam test analysis, expectation with target pulled back)] (Ilya) | ||
+ | ##* Ilya presented new calculations showing that the rates increase by about 15% when the target is retracted from 65 cm (nominal GlueX) to 1 cm. | ||
+ | ##* He continues to run MC studying the target dependence for the signal. | ||
+ | ## Hdgeant4 (initial setup and plan for running simulations) (Beni) | ||
+ | ##* The orientation of the MWPC wire planes has been implemented. Bugs in the code have been fixed related to incorrect units (mm vs cm). Pull request should fix them. | ||
+ | ##* The geometry xml files have been created, but not yet loaded into ccdb. The program hangs, but Richard has been notified. | ||
+ | ##* Mark and Beni will take a look at the program output. | ||
+ | ## Analysis (low level reconstruction, monitoring) | ||
+ | ##* Text has been added to the response to address the committee's concerns | ||
+ | ## [[Media:CDC Crate1 4 CPP.pdf | CDC Coverage of electronics by one crate]] (Beni) | ||
+ | ## MWPC gas system | ||
+ | ##* A new gas mixing system will be some effort. | ||
+ | ##* Buying premixed gas might be more straightforward, but carries schedule risk and direct cost. | ||
+ | ##* Rory estimates that we would consume 1 bottle every 2 days. Experience shows that there is several week delivery time. | ||
+ | ## Tracking / extrapolation to MWPCs (Simon) | ||
+ | ##* No report. Needs working MC. | ||
+ | ## Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory) | ||
+ | ##* Text has been added to the response to address the committee's concerns | ||
+ | ## Rates in MWPCs (Ilya) | ||
+ | ##* Estimates can be taken from the work to study the effect of joints in the iron casing for the Pb. The estimate for beam leakage is about 1 KHz. | ||
+ | ##* Ilya will collect information into one place. | ||
+ | ## Microscope move (Elton) | ||
+ | ##* [[Π polarizability Meeting Apr 12, 2021 | Meeting with Richard and Jim on April 12 @ 1:30 pm.]] | ||
+ | ##* By straddling the vacuum chamber support, we can move the microscope downstream by 280 cm. | ||
+ | ## Timeline to publication | ||
+ | ##* Updated version was reviewed. The main change was to increase the time for the CPP publication by 1 quarter relative to NPP, since the goal of 1% on the CPP cross section is likely require more time than the 5% NPP measurement. | ||
+ | ## Table of responsibilities | ||
+ | ##* Table revisited. Beni suggested adding a line for the testing in the EEL | ||
+ | # GlueX Data Analysis (Andrew) | ||
+ | #* Presented an update on the discrepancy (~4%) of elasticity between data and MC. The discrepancy increases with track momentum. | ||
+ | #* Andrew will use his data to determine a non-linear correction, which could be used to correct the e+e- data. | ||
+ | #* Ilya: Note that the FCAL response to electrons is slightly different than to photons at the percent level. It is still useful to determine the corrections for electrons (positrons). | ||
+ | #* This correction will be presented at the next calorimeter meeting. | ||
+ | # CPP Software | ||
+ | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=5011 Amplitude errors using bootstrap method] (Elton) | ||
+ | # PID + AI | ||
+ | # Other business | ||
+ | # Next meeting |
Latest revision as of 12:12, 14 April 2021
Meeting Time And Location
09:00 EST (JLab time) Weekly Meeting
REMOTE during Covid-19
Connecting
You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 949 429 419
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via iOS or Android App:
- Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: (408) 740-7256 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Action Items
Preliminary Agenda
- Previous CPP meeting: Apr 7, 2021
- Announcements
- Action Items
- CPP and NPP Readiness Review
- Responses to the ERR. This link points to the draft response to the ERR.
- MWPCs (fabrication, testing) (Rory)
- Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
- Hdgeant4 (initial setup and plan for running simulations) (Mark and Beni + moral support from David)
- Analysis (low level reconstruction, monitoring) (David to write paragraph)
- CDC Coverage of electronics by one crate (Beni)
- MWPC gas system
- Tracking / extrapolation to MWPCs (Simon)
- Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
- Rates in MWPCs (Ilya)
- Microscope move (Elton)
- Meeting with Richard and Jim on April 12 @ 1:30 pm.
- By straddling the vacuum chamber support, we can move the microscope downstream by 280 cm.
- Timeline to publication
- Table of responsibilities
- GlueX Data Analysis
- CPP Software
- PID + AI
- Other business
- Next meeting
Minutes
Attending:Elton, Albert, Andrew, Beni, Ilya, Mark, Rory
- Previous CPP meeting: Apr 14, 2021
- Announcements
- Action Items
- CPP and NPP Readiness Review
- Responses to the ERR. This link points to the draft response to the ERR.
- MWPCs (fabrication, testing) (Rory)
- Good progress. Two more sections more.
- Started stringing the 8th (last) MWPC last week, now that students are back on campus
- Elton: We should create single-page summary of MWPC, as was done for all previous GlueX detector systems. See GlueX-doc-2376
- Trigger rates (beam test analysis, expectation with target pulled back) (Ilya)
- Ilya presented new calculations showing that the rates increase by about 15% when the target is retracted from 65 cm (nominal GlueX) to 1 cm.
- He continues to run MC studying the target dependence for the signal.
- Hdgeant4 (initial setup and plan for running simulations) (Beni)
- The orientation of the MWPC wire planes has been implemented. Bugs in the code have been fixed related to incorrect units (mm vs cm). Pull request should fix them.
- The geometry xml files have been created, but not yet loaded into ccdb. The program hangs, but Richard has been notified.
- Mark and Beni will take a look at the program output.
- Analysis (low level reconstruction, monitoring)
- Text has been added to the response to address the committee's concerns
- CDC Coverage of electronics by one crate (Beni)
- MWPC gas system
- A new gas mixing system will be some effort.
- Buying premixed gas might be more straightforward, but carries schedule risk and direct cost.
- Rory estimates that we would consume 1 bottle every 2 days. Experience shows that there is several week delivery time.
- Tracking / extrapolation to MWPCs (Simon)
- No report. Needs working MC.
- Higher level analysis (e.g. PID, efficiencies and reconstruction) (Rory)
- Text has been added to the response to address the committee's concerns
- Rates in MWPCs (Ilya)
- Estimates can be taken from the work to study the effect of joints in the iron casing for the Pb. The estimate for beam leakage is about 1 KHz.
- Ilya will collect information into one place.
- Microscope move (Elton)
- Meeting with Richard and Jim on April 12 @ 1:30 pm.
- By straddling the vacuum chamber support, we can move the microscope downstream by 280 cm.
- Timeline to publication
- Updated version was reviewed. The main change was to increase the time for the CPP publication by 1 quarter relative to NPP, since the goal of 1% on the CPP cross section is likely require more time than the 5% NPP measurement.
- Table of responsibilities
- Table revisited. Beni suggested adding a line for the testing in the EEL
- MWPCs (fabrication, testing) (Rory)
- GlueX Data Analysis (Andrew)
- Presented an update on the discrepancy (~4%) of elasticity between data and MC. The discrepancy increases with track momentum.
- Andrew will use his data to determine a non-linear correction, which could be used to correct the e+e- data.
- Ilya: Note that the FCAL response to electrons is slightly different than to photons at the percent level. It is still useful to determine the corrections for electrons (positrons).
- This correction will be presented at the next calorimeter meeting.
- CPP Software
- PID + AI
- Other business
- Next meeting