2009.10.27 Jason EEMC geometry: effect of removing new SMD layers

Monte-Carlo setup:

  • One photon per event
  • Disabled/Enabled new SMD layers (EXPS EBLS EFLS) in Jason geometry
  • EEMC only and Full STAR geometry configurations with LOW_EM option
    (using Victor's geometry fix)
  • Throw particles flat in eta (1.08, 2.0), phi (0, 2pi), and pt (6-10 GeV)
  • Using A2Emaker to get reconstructed Tower/SMD energy
    (no EEMC SlowSimulator in chain)
  • Vertex z=0
  • ~50K/per particle type
  • Non-zero energy: 3 sigma above pedestal

Geometry configurations and notations (shown in the center of the plot):

  1. eemc-j: EEMC only with Jason geometry file
  2. full-j: Full STAR with Jason geometry file
  3. eemc-j-noL: EEMC only with Jason geometry file (disabled 3-new SMD layers)
  4. full-j-noL: Full STAR with Jason geometry file (disabled 3-new SMD layers)

Effect of removing SMD layers on SMD strips

Figure 1: Average number of SMD-u strips

Figure 2: Average number of SMD-v strips

Effect of removing SMD layers on sampling fraction

Figure 3: distribution of 1x1 sampling fraction

Figure 4: distribution of 2x1 sampling fraction

Figure 5: distribution of 3x3 sampling fraction

Figure 6: 1x1 sampling fraction vs. thrown energy

Figure 7: 2x1 sampling fraction vs. thrown energy

Figure 8: 3x3 sampling fraction vs. thrown energy