For Run 11, Tpc sector alignment calibration i have started taking all zero inital parameters . Subsequently in each iteration in local Db the parameter like "outerSectorLocalxShift" and "outerSectorRotationAngle" is changed .

Please, find here all sectors Residual_Y vs Local_Y co-ordinate as Y-axis and X-axis respectively.

http://www.star.bnl.gov/~nihar/run11_tpcCalib/

One can check my  macros and procedure in this following path

/star/data07/TPC/nihar/calibration_run11
 

What I observed ?

• Excluding inner and outer 5 pad rows, there is still outer Y-residual are not Zero.
• Outer Residual are not flat.
• In each iteration, it is observed that there is no significant change in residual.
• Inner Residual are very much distorted.

discussing with Maxim: the possible reasons

• outer residuals flat are not probably due to the residual space charge and grid leak