Difference between revisions of "Tracking-9-9-2021"
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(Created page with "# [https://halldweb.jlab.org/wiki/index.php/Connect_to_Bluejeans_Meetings Instructions for Bluejeans meeting connection] # Meeting ID: 290664653 # To join via a Web Browser, g...") |
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# Run preparations | # Run preparations | ||
#* CDC | #* CDC | ||
− | #* FDC | + | #* FDC [http://www.jlab.org/Hall-D/detector/fdc/Tracking_Sep9.pdf FDC1 C1] |
#* fADC125 | #* fADC125 | ||
# Tracking | # Tracking | ||
+ | #* Simluation of FDC tilt (θx=-0.0275, θy=0.0265), reconstruction with nominal geometry (Alex) | ||
+ | #** [https://halldweb.jlab.org/talks/2021/rho_pulls/PiMinusKinFitPulls_blacktilt_reddata.png π<sup>-</sup>] ,comparison to real data in red | ||
+ | #** [https://halldweb.jlab.org/talks/2021/rho_pulls/ProtonKinFitPulls_blacktilt_reddata.png proton] ,comparison to real data in red | ||
+ | #* Ongoing: study effect on [https://halldweb.jlab.org/wiki/index.php/File:Fdc_tilt_p2pi.PNG PΣ] and SDMEs | ||
# Other | # Other | ||
== Minutes == | == Minutes == | ||
+ | # Run preparations | ||
+ | #* CDC - the CDC bubbler stopped, Beni will look at it, most likely needs oil. | ||
+ | #* FDC - In addition to what was posted at the last tracking meeting as an action plan: the FDC spare package was moved to EEL126. Tim proposed as another option to use a pump at the supply line combined with reversing the gas flow. Beni - might be dangerous as the foils bend in the other direction. As a last resort, if reversing doesn't unclog the line, we can use the gauge line (that is used to measure the pressure inside the cell) as an exhaust - requires a very delicate pressure balance, but should work. We should plan to replace the FDC MFCs with rotameters - discussed the effects of the pressure variation as a result of the pressure cycle in the mixing tank (10-12 psi). | ||
+ | # Tracking | ||
+ | #* Alex set the efforts to find the FDC rotations from real data aside and focused on MC simulation instead. He generated a 'flat' rho signal sample with a slightly rotated FDC and reconstructed it with the nominal geometry. Some of the features in the pulls, especially in x and z, look similar to the ones observed in real data. In addition, the reconstructed beam direction appears rotated, just like observed in [https://github.com/JeffersonLab/halld_recon/issues/531 issue #531]. He will generate samples with angular distributions and study the effect on the decay polarization and SDME extraction next. |
Latest revision as of 10:28, 13 September 2021
- Instructions for Bluejeans meeting connection
- Meeting ID: 290664653
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Thu 9/9/2021 2pm
Agenda
- Run preparations
- CDC
- FDC FDC1 C1
- fADC125
- Tracking
- Other
Minutes
- Run preparations
- CDC - the CDC bubbler stopped, Beni will look at it, most likely needs oil.
- FDC - In addition to what was posted at the last tracking meeting as an action plan: the FDC spare package was moved to EEL126. Tim proposed as another option to use a pump at the supply line combined with reversing the gas flow. Beni - might be dangerous as the foils bend in the other direction. As a last resort, if reversing doesn't unclog the line, we can use the gauge line (that is used to measure the pressure inside the cell) as an exhaust - requires a very delicate pressure balance, but should work. We should plan to replace the FDC MFCs with rotameters - discussed the effects of the pressure variation as a result of the pressure cycle in the mixing tank (10-12 psi).
- Tracking
- Alex set the efforts to find the FDC rotations from real data aside and focused on MC simulation instead. He generated a 'flat' rho signal sample with a slightly rotated FDC and reconstructed it with the nominal geometry. Some of the features in the pulls, especially in x and z, look similar to the ones observed in real data. In addition, the reconstructed beam direction appears rotated, just like observed in issue #531. He will generate samples with angular distributions and study the effect on the decay polarization and SDME extraction next.