Dedx status Zoltán Fodor KFKI – Research Institute for Particle and Nuclear Physics.
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Transcript of Dedx status Zoltán Fodor KFKI – Research Institute for Particle and Nuclear Physics.
Dedx status
Zoltán Fodor
KFKI – Research Institutefor Particle and Nuclear Physics
Zoltán Fodor 208.06.11
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
Zoltán Fodor 308.06.11
pC thin target
negativespositives
Zoltán Fodor 408.06.11
pp 30 Gev
negativespositives
Zoltán Fodor 508.06.11
-C 158 GeV
negativespositives
Zoltán Fodor 608.06.11
pC 30 thin target 2009
1.5 GeV 4.5 GeV 7.5 GeV 10.5 GeV
positives
negatives
Zoltán Fodor 708.06.11
pp 30 GeV
1.5 GeV 4.5 GeV 7.5 GeV 10.5 GeV
positives
negatives
Zoltán Fodor 808.06.11
-C 158 GeV
1.5 GeV 4.5 GeV 7.5 GeV 10.5 GeV
positives
negatives
Zoltán Fodor 908.06.11
pC 30 thin target 2009
14.5 GeV 18.5 GeV
positives
negatives
Zoltán Fodor 1008.06.11
pp 30 GeV
14.5 GeV 18.5 GeV
positives
negatives
Zoltán Fodor 1108.06.11
-C 158 GeV
14.5 GeV 18.5 GeV
positives
negatives
Zoltán Fodor 1208.06.11
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/
Zoltán Fodor 1308.06.11
• Gauss function fitted to the peaks around the peak value
Zoltán Fodor 1408.06.11
• Changes of peak positions
pionspc2009/pc2007
protonspc2009/pc2007
pionspp30/pc2007
protonspp30/pc2007 pions
-C30/pc2007
Zoltán Fodor 1508.06.11
• The peak position is not changing with WFA cut
• The peak position is not changing with TOF selection /pC2007 and pC2009/
Zoltán Fodor 1608.06.11
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
Zoltán Fodor 1708.06.11
Diffx: no change
Difft: no change
Threshold: 6
Zoltán Fodor 1808.06.11
Diffx: no change
Difft: -20%
Threshold: 6
Zoltán Fodor 1908.06.11
Diffx: -20%
Difft: no change
Threshold: 6
Zoltán Fodor 2008.06.11
Diffx: no change
Difft: no change
Threshold: 5
Zoltán Fodor 2108.06.11
Diffx: -25%
Difft: -25%
Threshold: 6
Zoltán Fodor 2208.06.11
Diffx: -25%
Difft: -25%
Threshold: 5
Zoltán Fodor 2308.06.11