1 / 12

energy resolution and uniformity

energy resolution and uniformity. EMCAL test beam 2007 @cern SPS /PS. Delia Hasch emcal meeting Nantes 15-17/07/2008. SPS-1/2 runs (e data): (AliRoot analysis, using trunk version as of Feb.20).

colby-parsons
Download Presentation

energy resolution and uniformity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. energy resolution @diff. positions EMCAL test beam 2007 @cern SPS/PS run371 @80 GeV run589 @80 GeV Delia Hasch emcal meeting Nantes 15-17/07/2008 ‘good’ calibration ‘bad’ calibration  (relative) re-calibration needed (on ToDo list)

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

  4. energy resolution @diff. positions EMCAL test beam 2007 @cern SPS/PS single position resolution Delia Hasch emcal meeting Nantes 15-17/07/2008 only ‘good’ calibrations: 14  6 positions Alexei’s values (June08) summing all SPS-1 runs after re-calibration

  5. linearity @diff. positions EMCAL test beam 2007 @cern SPS/PS Delia Hasch emcal meeting Nantes 15-17/07/2008 only ‘good’ calibrations: 14  6 positions ~ (still) factor 0.8 off … any idea ?

  6. EMCAL test beam 2007 @cern SPS/PS beam energy resolution Delia Hasch emcal meeting Nantes 15-17/07/2008  determined by position of momentum defining collimators C3, C8: with DC3/DC8 … full width opening of the collimators [mm] factor 19.4% … vertical momentum dispersion of beam at C3 compared to C8  DC3/8 standard settings @SPS: ±30 mm:  0.7% @ ±10 mm rms:

  7. beam energy resolution EMCAL test beam 2007 @cern SPS/PS single position resolution Delia Hasch emcal meeting Nantes 15-17/07/2008  determined by position of momentum defining collimators C3, C8: standard settings: C3/C8 @30 mm  C3/C8 @10 mm (run727,28,34)

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

  9. uniformity of response EMCAL test beam 2007 @cern SPS/PS Delia Hasch emcal meeting Nantes 15-17/07/2008 80 GeV electron beam: position scan  ToDo: (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

  10. EMCAL test beam 2007 @cern SPS/PS for discussion: gain jumps Delia Hasch emcal meeting Nantes 15-17/07/2008 • reconstructed energy > incident energy: run725 @80GeV run726 @60GeV mean: 100 GeV mean: 120 GeV no ‘extreme’ temperature behaviour observed… any hint ?

  11. EMCAL test beam 2007 @cern SPS/PS an interesting point… Delia Hasch emcal meeting Nantes 15-17/07/2008 80GeV incident beam energy ‘MC’ calib data base ‘test beam’ calib data base factor 0.8 off 

  12. EMCAL test beam 2007 @cern SPS/PS ToDo Delia Hasch emcal meeting Nantes 15-17/07/2008 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

More Related