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

1. Details of analysis are given here.

2. Input: one-electron events.
   Generated electrons have fixed pT and varied: uniform zVertex [-40,+40] cm eta range [0.8,2.2] , and phi distribution, 30K events total.

3. 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 UPGR13 FGT geometry: Z1=60cm, Z6=150cm :
   

4. 2D charge reco efficiency using all detectors (Vertex, IST1+2, SSD, 6-disk FGT, truncated TPC(nHit>=5), ESMD)
   The ~horizontal black lines mark Endcap covarage. Vertical dashed line mark expected size of the interaction diamond.
   

5. 2D charge reco efficiency without IST and SSD (Vertex 6-disk FGT, truncated TPC(nHit>=5), ESMD)
   UPGR13 FGT geometry: Z1=60cm, Z6=150cm
   

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6. Change FGT geometry: shift to the left, Z1=24cm, Z6=114cm
   
   

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7. Change FGT geometry: spread wider Z1=30cm, Z6=150cm
   
   

   Conclusions so far:
   * Without IST & SSD we have problem for zVertex in [-30,0] cm and eta in [1.6,1.8]
   * Shiftig whole FGT from Z1=60 to Z1=24 cm gives more uniform efficiency in comparison to spreading disks more appart.