Evaluation of timing of TpcRS for pp, AuAU, UU M-C events

Status as of Nov 5:

1. Yuri's plan for TpcRS :
   • ADC correction which will be applied for run IX dE/dx calibration
   • Systematics in reconstructed cluster pad position versus no. of pads
     used in reconstruction and cluster position on pad
     I am happy with that.
2. Still TpcRS has missing account for dE/dx calibration (which has to be done for run IX) and
   distortions. This is the highest priority for now.
3. The timing issue is important and I am going to work on that but not now.
   It is clear that it is possible combine generated electrons in pseudo clusters and transport them.
   But I don't want to loose quality of simulation. This will require a lot of tuning.
   The timing is not an issue for embedding.
4. Anybody who wants to to use Trs for TPX can do that
   but this simulation will have no sense at all even this will be done a factor of 13 faster.
   Yuri

Hi Chitrasen, November 12, 2009 10:48:02 AM EST
1. Difference in pT dependence dE/dx for MC and data is just due to
the fact that
GEANT does not describe the data. See slide 5 in http://drupal.star.bnl.gov/STAR/system/files/TpcRS.pdf
2. Difference in sigma dE/dx is also coming from disagreement data and
GEANT/TRS model.
Yuri

Hi Gene, from Jeff/Tonko I got the following txt - files for gains.

~/work/tpx_gain $ ls -1 tpx_gains.txt.*
tpx_gains.txt.02Feb09
tpx_gains.txt.11Dec2008
tpx_gains.txt.15Apr09
tpx_gains.txt.15Jan08
tpx_gains.txt.forFY08
tpx_gains.txt.until15Apr09

My guess is that 2008-12-11 entry corresponds to one of the first
pulser runs with full TPX.
It does not interfere if you will put
the ideal entry for y2009 with time stamp 2008-12-15 00:00:00
Yuri

Dec 3
Simulated cluster shape with y2010 Altro parameters wrt y2009 simulation and data
plots