Difference between revisions of "Minutes-6-30-2016"
(→Agenda) |
|||
| (9 intermediate revisions by 2 users not shown) | |||
| Line 14: | Line 14: | ||
#* CDC update (Naomi/Mike/Beni) | #* CDC update (Naomi/Mike/Beni) | ||
#* FDC update (Lubomir/Alex) | #* FDC update (Lubomir/Alex) | ||
| − | #** Position | + | #** Position resolution continued: [https://halldweb.jlab.org/wiki/images/d/dd/Residual_2D.pdf Residual_2D] [https://halldweb.jlab.org/wiki/images/2/2d/Residual_Slice_Fit.pdf Slice_Fit] [https://halldweb.jlab.org/wiki/images/7/7f/Residual_Profile_Fit.pdf Profile_Fit] |
| − | #** Timing Reconstruction [https://halldweb.jlab.org/wiki/images/8/8d/Old_timing.pdf Pseudo_old] [https://halldweb.jlab.org/wiki/images/1/16/New_timing.pdf Pseudo_new] | + | #** Timing Reconstruction: [https://halldweb.jlab.org/wiki/images/8/8d/Old_timing.pdf Pseudo_old] [https://halldweb.jlab.org/wiki/images/1/16/New_timing.pdf Pseudo_new] |
| + | #** FDC tracking with timing using GenFit with Event Visualization Environment (EVE) of Root [http://www.jlab.org/Hall-D/detector/fdc/genfit/eve11055_178.png track], [http://www.jlab.org/Hall-D/detector/fdc/genfit/eve11055_178zoomed.png zoomed in one package], [http://www.jlab.org/Hall-D/detector/fdc/genfit/eve11055_178zoomed_nolr.png after left/right decision], [http://www.jlab.org/Hall-D/detector/fdc/genfit/resX_Y_11055_ev178.pdf X vs Y residuals], [http://www.jlab.org/Hall-D/detector/fdc/genfit/resX_11055_ev178.pdf X residuals],[http://www.jlab.org/Hall-D/detector/fdc/genfit/resY_11055_ev178.pdf Y residuals] | ||
# NIM Papers | # NIM Papers | ||
#* svn ls https://halldsvn.jlab.org/repos/trunk/publications/GlueXCDC | #* svn ls https://halldsvn.jlab.org/repos/trunk/publications/GlueXCDC | ||
| Line 21: | Line 22: | ||
# fADC125 meeting (Naomi, Cody, Beni) | # fADC125 meeting (Naomi, Cody, Beni) | ||
# Other | # Other | ||
| − | + | #* [https://halldweb1.jlab.org/wiki/index.php/Minutes-6-23-2016 TRD meeting] | |
| − | + | ||
= Minutes = | = Minutes = | ||
| − | Participants: Sean (NU), Naomi, Mike (CMU) Luke | + | Participants: Sean (NU),Curtis, Naomi, Mike (CMU) Luke, Alexander A., Simon, Sergey, and Lubomir (JLab). |
== CDC == | == CDC == | ||
| − | - Naomi is working on the | + | - Naomi is working on the gain calibration, Mike on the straw deformation effects and corresponding errors. |
| − | + | ||
| − | + | ||
== FDC == | == FDC == | ||
| − | - Alex | + | - Alex continued his presentation (linked above) from the last meeting now showing the Y-residuals (along wire) as a function of the X-residuals (first plot), both measured w.r.t. avalanche (hit) position. Since the avalanche is always on the wire, the X-residuals represents the drift distance and the Y-residual the deflection of the drifting electron due to the magnetic field. The linear correlation (third plot) means that the deflection is simply proportional to the drift distance, with a slope also proportional to the magnetic field. Garfield simulations confirm this. The Y-residuals are about 200 microns (second plot). |
| − | - | + | - Alex also worked on the FDC timing both from fADC125s and TDCs(next two plots). The drift time offset calibration has to be done for each run, since it may move. |
| − | + | - Lubomir is working with the GENFIT tracking package to study the FDC performance in magnetic field. The package uses Kalman fitter but also combined with the Deterministic Annealing Filter (DAF) that assigns weights to the hits and thus can solve left/right ambiguity. The package is using the Event Viewer Environment (Eve) for ROOT that offers good control over the fitting track by track (see pictures attached above). Lubomir is working so far with straight tracks but will continue with curved ones. | |
| − | + | == Other == | |
| − | - | + | - There was a meeting (see link) with the detector group (Drew Weisenberger and Brian Cross) for building a TRD prototype. The plan is to build a chamber similar to the spare FDC package used for the TRD prototyping but with only 24x12 cm active area. The main difference is that we will apply negative HV to the upstream cathode that will be made out of thin aluminized Kapton. |
Latest revision as of 18:33, 8 July 2016
June 30, 2016 Drift Chamber meeting
Connection
- Instructions for Bluejeans meeting connection
- Meeting ID: 290664653
Headline text
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Agenda
- Detector updates
- CDC update (Naomi/Mike/Beni)
- FDC update (Lubomir/Alex)
- Position resolution continued: Residual_2D Slice_Fit Profile_Fit
- Timing Reconstruction: Pseudo_old Pseudo_new
- FDC tracking with timing using GenFit with Event Visualization Environment (EVE) of Root track, zoomed in one package, after left/right decision, X vs Y residuals, X residuals,Y residuals
- NIM Papers
- fADC125 meeting (Naomi, Cody, Beni)
- Other
Minutes
Participants: Sean (NU),Curtis, Naomi, Mike (CMU) Luke, Alexander A., Simon, Sergey, and Lubomir (JLab).
CDC
- Naomi is working on the gain calibration, Mike on the straw deformation effects and corresponding errors.
FDC
- Alex continued his presentation (linked above) from the last meeting now showing the Y-residuals (along wire) as a function of the X-residuals (first plot), both measured w.r.t. avalanche (hit) position. Since the avalanche is always on the wire, the X-residuals represents the drift distance and the Y-residual the deflection of the drifting electron due to the magnetic field. The linear correlation (third plot) means that the deflection is simply proportional to the drift distance, with a slope also proportional to the magnetic field. Garfield simulations confirm this. The Y-residuals are about 200 microns (second plot).
- Alex also worked on the FDC timing both from fADC125s and TDCs(next two plots). The drift time offset calibration has to be done for each run, since it may move.
- Lubomir is working with the GENFIT tracking package to study the FDC performance in magnetic field. The package uses Kalman fitter but also combined with the Deterministic Annealing Filter (DAF) that assigns weights to the hits and thus can solve left/right ambiguity. The package is using the Event Viewer Environment (Eve) for ROOT that offers good control over the fitting track by track (see pictures attached above). Lubomir is working so far with straight tracks but will continue with curved ones.
Other
- There was a meeting (see link) with the detector group (Drew Weisenberger and Brian Cross) for building a TRD prototype. The plan is to build a chamber similar to the spare FDC package used for the TRD prototyping but with only 24x12 cm active area. The main difference is that we will apply negative HV to the upstream cathode that will be made out of thin aluminized Kapton.
