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Re: [Sphenix-tpc-l] Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT)
- From: "Tarafdar, Sourav" <sourav.tarafdar AT vanderbilt.edu>
- To: Klaus Dehmelt <klaus.dehmelt AT stonybrook.edu>, Bob Azmoun <azmoun AT bnl.gov>, Carlos Perez <carlos.perezlara AT stonybrook.edu>, Nils Feege <nils.feege AT stonybrook.edu>, Veronica Canoa Roman <veronica.canoaroman AT stonybrook.edu>, Jeff Spahn <jspahn.04 AT gmail.com>, Thomas K Hemmick <hemmick AT skipper.physics.sunysb.edu>, "Greene, Senta V" <senta.v.greene AT Vanderbilt.Edu>, "Velkovska, Julia A" <julia.velkovska AT Vanderbilt.Edu>, Prakhar Garg <prakhar.garg AT stonybrook.edu>, Jin Huang <jhuang AT bnl.gov>, "sphenix-tpc-l AT lists.bnl.gov" <sphenix-tpc-l AT lists.bnl.gov>
- Subject: Re: [Sphenix-tpc-l] Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT)
- Date: Thu, 16 Feb 2017 23:19:18 +0000
Dear all,
Revisiting the charge cloud formulation in TPC Geant4. Based on discussion amongst the TPC group during October it became clear that one doesn't need to use the effective number of electrons within charge cloud formulation as the formulation of charge cloud provides us it's spatial extension rather than the undertainty in the position of measurement. Bit of details are explained in the slides of Sourav.
Carlos presented effect of gas factor change on clusterizer. Charge cloud size vs drift length in TPC distribution looks what is expected. This leads to the information response of TPC readout pads. The distribution of mean number of electrons per cell on slide #4 it seems reasonable after doing an online check on mean electrons vs layer number profile histogram. As expected the mean number of electrons showed larger electron density in innermost module as compared to the outermost module. Suggestion is to use pure pions event to get rid of statistical fluctuation and to get more clear picture as compared to just picking up low statistics Hijing tracks.
Future plan is to implement digitizer but after sorting out the issue of TPC clusterizer.
Below you can find the sPHENIX tpc software meeting minutes which is also available on the agenda page.
sPHENIX TPC software (16 Feb 2017)
Revisiting the charge cloud formulation in TPC Geant4. Based on discussion amongst the TPC group during October it became clear that one doesn't need to use the effective number of electrons within charge cloud formulation as the formulation of charge cloud provides us it's spatial extension rather than the undertainty in the position of measurement. Bit of details are explained in the slides of Sourav.
Carlos presented effect of gas factor change on clusterizer. Charge cloud size vs drift length in TPC distribution looks what is expected. This leads to the information response of TPC readout pads. The distribution of mean number of electrons per cell on slide #4 it seems reasonable after doing an online check on mean electrons vs layer number profile histogram. As expected the mean number of electrons showed larger electron density in innermost module as compared to the outermost module. Suggestion is to use pure pions event to get rid of statistical fluctuation and to get more clear picture as compared to just picking up low statistics Hijing tracks.
Future plan is to implement digitizer but after sorting out the issue of TPC clusterizer.
Thanks,
Sourav
From: Tarafdar, Sourav
Sent: Wednesday, February 15, 2017 3:39 PM
To: Klaus Dehmelt; Bob Azmoun; Carlos Perez; Nils Feege; Veronica Canoa Roman; Jeff Spahn; Thomas K Hemmick; Greene, Senta V; Velkovska, Julia A; Prakhar Garg; Jin Huang; sphenix-tpc-l AT lists.bnl.gov
Subject: Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT)
To: Klaus Dehmelt; Bob Azmoun; Carlos Perez; Nils Feege; Veronica Canoa Roman; Jeff Spahn; Thomas K Hemmick; Greene, Senta V; Velkovska, Julia A; Prakhar Garg; Jin Huang; sphenix-tpc-l AT lists.bnl.gov
Subject: Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT)
Dear all,
We will resume our weekly TPC software meeting from tomorrow. Below is the indico page with moderation passcode :1008.
Feel free to add yourself into the agenda if anyone wants to discuss/present something.
Best regards,
-Sourav
-
[Sphenix-tpc-l] Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT),
Tarafdar, Sourav, 02/15/2017
- Re: [Sphenix-tpc-l] Weekly Thursday TPC software meeting , 16th February 2017 (12:30 pm EDT), Tarafdar, Sourav, 02/16/2017
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