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Dedx status Zoltán Fodor KFKI – Research Institute for Particle and Nuclear Physics.

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Presentation on theme: "Dedx status Zoltán Fodor KFKI – Research Institute for Particle and Nuclear Physics."— Presentation transcript:

1 Dedx status Zoltán Fodor KFKI – Research Institute for Particle and Nuclear Physics

2 Zoltán Fodor Status Fully reconstructed runs /pC30, pp30,  - C158 GeV/ are calibrated for timedepedence, ydependence, and sector constants using the 2007 BB function and amplitude loss corrections. dedxna61 client is updated for this runs

3 Zoltán Fodor pC thin target negatives positives

4 Zoltán Fodor pp 30 Gev negatives positives

5 Zoltán Fodor  - C 158 GeV negatives positives

6 Zoltán Fodor pC 30 thin target GeV4.5 GeV 7.5 GeV10.5 GeV positives negatives

7 Zoltán Fodor pp 30 GeV 1.5 GeV4.5 GeV7.5 GeV10.5 GeV positives negatives

8 Zoltán Fodor  - C 158 GeV 1.5 GeV4.5 GeV7.5 GeV10.5 GeV positives negatives

9 Zoltán Fodor pC 30 thin target GeV18.5 GeV positives negatives

10 Zoltán Fodor pp 30 GeV 14.5 GeV18.5 GeV positives negatives

11 Zoltán Fodor  - C 158 GeV 14.5 GeV18.5 GeV positives negatives

12 Zoltán Fodor To do Amplitude loss corrections – New simulations /on going/ – then new calibrations for ydep (and sector constants) Chipgain calibration – 2 different calibration for pC and others /because of spikes/ – Modified the dedxna61 client, to reject the chips with spikes – (Then new calibration of sector constants) BB calibrations for low and high momentum region, using all the datasets and selected particles by TOF /started/ – Then new calibration of sector constants Jovan realized the dedx valu not propagate to the rootfiles for secondary tracks /in DSPACK exist/

13 Zoltán Fodor Gauss function fitted to the peaks around the peak value

14 Zoltán Fodor Changes of peak positions pions pc2009/pc2007 protons pc2009/pc2007 pions pp30/pc2007 protons pp30/pc2007 pions  - C30/pc2007

15 Zoltán Fodor The peak position is not changing with WFA cut The peak position is not changing with TOF selection /pC2007 and pC2009/

16 Zoltán Fodor Amplitude loss correction The pC30 thin target and p-C158 are tested with different corrections The effect and corrections very close in the two datasets Checked variation of diffusion on space direction, time direction, thresholds, and several combination – For MTPC we can produce close to 0 absorption – For VTPC relatively high correction also give a negative absorption Could be checked the gas composition dependence Work on progress Thank to Nicolas to producing the new tables

17 Zoltán Fodor Diffx: no change Difft: no change Threshold: 6

18 Zoltán Fodor Diffx: no change Difft: -20% Threshold: 6

19 Zoltán Fodor Diffx: -20% Difft: no change Threshold: 6

20 Zoltán Fodor Diffx: no change Difft: no change Threshold: 5

21 Zoltán Fodor Diffx: -25% Difft: -25% Threshold: 6

22 Zoltán Fodor Diffx: -25% Difft: -25% Threshold: 5

23 Zoltán Fodor


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