All plots on this page are produced for a single electron events with pT of 40 GeV/c.

1. Input: one-electron events.
   Generated electrons have fixed pT and zVertex of -30, 0, or +30 cm, and uniform eta and phi distribution. Sample of high pT electrons thrown from different zVertex location over eta range [1,2] are shown here: Z=-30cm , Z=0cm , Z=+30cm ,
   Combined 3Z locations:
   
   The plot shows 9 electrons with fixed pT=40 GeV/c, Z={-30,0,+30}cm, and eta={1.0,1.5,2.0}

2. Assumptions about resolution of detectors.
   * Use: Vertex, IST1+2, SSD, 6-disk FGT, truncated TPC(nHit>=5), ESMD

   detector	assumed resolution	weight of the point	Remarks
   vertex	200 mu m in X,Y 30 cm in Z	W=1/(200 mu m)^2	added as a hit
   IST1	20 mum in r*phi 0.5 mm in Z	W=1/(20 mu m)^2	-
   IST2	0.5 mm in r*phi 20 mum in Z	W=1/(0.5 mm)^2	-
   SSD	20 mum in r*phi 1 mm in Z	W=1/(20 mu m)^2	-
   FGT	60 mu m in X,Y 1 mm in Z	W=1/(60 mu m)^2	6 disks hit reco eff=100%
   TPC	1 mm along arc 1 mm in Z	W=1/(1mm)^2	* drop padrow #1 and #13 * drop hits at |Z|>197 cm * drop all hits if below 5
   Endcap SMD mock hit **)	1.5 mm in X,Y 5mm in Z	W=1/(1.5 mm)^2	at xPoint of Geant helix w/ SMD plane

   
   **) Based on SMD response study by Jim

3. Hit distribution (Rxy vs.eta) for 3 vertex locations( -30cm, 0, +30 cm), shown for config=A. IST+SSD and FGT are off for configs B,C. Config D has FGT disk at different Z-location and IST+SSD is off.

4. The following detector configuartions have been considered

       CONFIG    
            A :  default 
            B :  no IST, no SSD
            C :  only TPC+SMD+VERT
            D :  no IST, no SSD, variable FGT(Z) 

5. Quality of the reco 3D tracks (fit of circle+line) is defined based on a difference of the reco direction of primary track at the vertex vs. Geant track direction.

   Track reco efficiency is defined as the ratio of# of reco tracks (N1) w/
   * nFitP>=5, including vertex as a hit
   * delPhi<3 mrad
   * delTheta <3 mrad
   to the # of generated electrons (N0).

   Charge reco efficiency requiers additinal
   * the sign of the reco charge is correct. Track counter is N2.
   No cut on reco pT is imposed.

6. Resulting track, charge reco efficiency and contamination for electrons w/ pt=40 GeV/c, flat in eta [0.5,2.5], flat in phi in 2*pi, 5K events per sample
   Note, we do not want to be in the magenta sqare.

   track Eff= N1/N0	charg eff = N2/N0	wrong charge (N1-N2)/N1	Geant Pt - Reco Pt , matched in delEta & delPhi
   Config A : all in: Vertex, IST1+2, SSD, FGT, TPC , ESMD
   Config B : drop IST, drop SSD
   Config C : use only TPC+ESMD+Vertex