SR1 Cosmics Alignment

Global Chi2 Alignment

Results using the SR1 Cosmics Geometry and using our own ntuple (Biased residuals) to procude the plots.

Simulation Data

Results with events simulated without distortions (Nominal means Ideal). Misalignment could be introduced at reconstruction level. One has to be aware about:

• MCS means full energy range simulation where one will have low momentum tracks with Multiple Coulomb Scattering: E = [0.5,200] GeV
• NoMCS means simulation just with high momentum tracks and therefore one can neglect the Multiple Coulomb Scattering effect: E = [20,200] GeV
• Track cuts: requiring at least 5 hits on track
• No momentum cuts

Simulation Data (with residual Φ dependence problem):

Results with the old simulated sample where the Φ-dependence problem was not solved:

Extra information:

• Athena release 12.0.1
• InDetCosmicRecExample-00-00-64
• SiGlobalChi2Algs-00-00-41
• No momentum cuts
• Private production: /castor/cern.ch/user/c/cescobar/cosmics/12.0.1/dig/SimWithPhiBug/

Simulation with release 12.0.1 (Φ-dependent)
# Iter	# events	# tracks	# hits	Setup	Sample	HitCut	ModCut	GlobalPos	LocalPos	Summary plots
0	187k	174669	2225557	Nominal	NoMCS	200	6	()	()

Simulation Data (without residual Φ dependence problem):

Official production by Sofia Chouridou: /castor/cern.ch/user/i/idcosmic/12.0.3_new/setup6/dig/

Results with the new simulated sample where the Φ-dependence problem was solved. Extra information:

• Athena release 12.0.1
• InDetCosmicRecExample-00-00-64
• SiGlobalChi2Algs-00-00-41
• No momentum cuts
• Private production: /castor/cern.ch/user/c/cescobar/cosmics/12.0.1/dig/

Simulation with release 12.0.1
# Iter	# events	# tracks	# hits	Setup	Sample	HitCut	ModCut	GlobalPos	LocalPos	Summary plots
0	187k	180563	2379651	Nominal	NoMCS	200	6	()	()
1	187k	-	-	Nominal	NoMCS	200	6	-	-
2	187k	-	-	Nominal	NoMCS	200	6	-	-
3	187k	-	-	Nominal	NoMCS	200	6	-	-
4	187k	-	-	Nominal	NoMCS	200	6	-	-
5	187k	-	-	Nominal	NoMCS	200	6	-	-
6	187k	-	-	Nominal	NoMCS	200	6	-	-
7	187k	-	-	Nominal	NoMCS	200	6	-	-
Evolution Results (NoMCS):
0	211k	205510	2652402	Nominal	MCS	200	6	()	()
1	211k	-	-	Nominal	MCS	200	6	-	-
2	211k	-	-	Nominal	MCS	200	6	-	-
3	211k	-	-	Nominal	MCS	200	6	-	-
4	211k	-	-	Nominal	MCS	200	6	-	-
5	211k	-	-	Nominal	MCS	200	6	-	-
6	211k	-	-	Nominal	MCS	200	6	-	-
7	211k	-	-	Nominal	MCS	200	6	-	-
Evolution Results (MCS):

Real Data

Results with the following properties:

• 133k events
• Release 12.0.1
• Runs: 2935, 2939, 2986, 2992, 3007, 3013, 3038, 3039, 3080
• Initial modules (masking bad modules from DB): 468
• Number of aligned modules: 452 (2712 DoFs)
• No momentum cuts
• Track cuts: requiring at least 5 hits on track

Real Data Plots
# Iter	# events	# tracks	# hits	GlobalPos	LocalPos	Summary plots	Alignment Constants
0	133k	103927	1267097	()	()		-
1	133k			-	-		-
2	133k			-	-		-
3	133k			-	-		-
4	133k			-	-		-
5	133k			-	-		-
6	133k			-	-		-
7	133k			-	-		-
8	133k			-	-		-
Evolution Results:

Alignment Constants

Alignment Constants - SR1 Cosmics
Description	# Events	Modules (DoFs)	HitCut	VtxFit	ModeCut	# Iters	Alignment Constants	IDAlignDB file
Nominal	133k	452 (2712)	200	No	6	8	(pool.root)	-

Efficiency comparation

Plotting the efficiency and residual plots for the "combined samples" for the different alignment constants with the following properties:

• 125910 events
• Runs used: 3007, 3044, 3055, 3057, 3080, 3098 and 3099
• Unbiased hit-efficiency for roadwidth of 150 μm

SR1 Cosmics Note

Link to CVS where the note is in progress: SR1 Cosmics Note

-- CarlosEscobar - 29 Mar 2007 -- CarlosEscobar - 03 Jul 2007