EMCAL test beam 2007 cern SPSPS energy resolution

EMCAL test beam 2007 @cern SPS/PS energy resolution and uniformity SPS-1/2 runs (e data): (Ali. Root analysis, using trunk version as of Feb. 20) containing all changes from Jennifer++ energy resolution @different positions: (14) 6 positions 5 -100 Ge. V electrons resolution of beam energy different collimator settings @60 -100 Ge. V uniformity of energy response with 80 Ge. V electrons module&tower centers, module borders caveats: (relative) tower-to-tower re-calibration first point on To. Do list Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS energy resolution @diff. positions ‘good’ calibration ‘bad’ calibration run 371 @80 Ge. V run 589 @80 Ge. V (relative) re-calibration needed (on To. Do list) Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS energy resolution @diff. positions only ‘good’ calibrations: 14 6 positions single position resolution Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS energy resolution @diff. positions only ‘good’ calibrations: 14 6 positions single position resolution Alexei’s values (June 08) summing all SPS-1 runs after re-calibration Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS linearity @diff. positions only ‘good’ calibrations: 14 6 positions ~ (still) factor 0. 8 off Delia Hasch emcal meeting Nantes … any idea ? 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS beam energy resolution determined by position of momentum defining collimators C 3, C 8 : with DC 3/DC 8 … full width opening of the collimators [mm] factor 19. 4% … vertical momentum dispersion of beam at C 3 compared to C 8 DC 3/8 standard settings @SPS: ± 30 mm: 0. 7% @ ± 10 mm rms: Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS beam energy resolution determined by position of momentum defining collimators C 3, C 8 : standard settings: C 3/C 8 @30 mm C 3/C 8 @10 mm (run 727, 28, 34) single position resolution Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS rear view uniformity of response position scan 80 Ge. V electron beam module centers tower centers module/tower borders processing… Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS uniformity of response 80 Ge. V electron beam: position scan To. Do: (relative) re-calibration; correction for time dependence (temp) of gain module centers tower centers module borders 3% variation 2. 4% resolution from Alexei after recalibration Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS for discussion: gain jumps • reconstructed energy > incident energy: run 725 @80 Ge. V run 726 @60 Ge. V mean: 120 Ge. V mean: 100 Ge. V no ‘extreme’ temperature behaviour observed… any hint ? Delia Hasch emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS an interesting point… 80 Ge. V incident beam energy ‘test beam’ calib data base factor 0. 8 off Delia Hasch ‘MC’ calib data base emcal meeting Nantes 15 -17/07/2008

EMCAL test beam 2007 @cern SPS/PS To. Do relative tower –to- tower calibration for both energy scans and uniformity studies : iterative from data at module centers using events with 4 cells per cluster ‘cross check’ with data at tower centers / mip calibration (see Marie’s studies) / re-calib from Alexei … apply temperature gain corrections for uniformity studies using correction routine from David Delia Hasch emcal meeting Nantes 15 -17/07/2008